Thin-Walled Structures最新文献_第4页

Deep learning-based study of strength variance coefficient for large diameter thin-walled structures

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-02-18 DOI: 10.1016/j.tws.2025.113059

Hongfei Fu, Weixiu Xv, Fan Yang, Liangliang Jiang, Yuhong Shi

{"title":"Deep learning-based study of strength variance coefficient for large diameter thin-walled structures","authors":"Hongfei Fu, Weixiu Xv, Fan Yang, Liangliang Jiang, Yuhong Shi","doi":"10.1016/j.tws.2025.113059","DOIUrl":"10.1016/j.tws.2025.113059","url":null,"abstract":"<div><div>Strength variation coefficient is a basic parameter to carry out structural reliability design and assessment, for the large diameter thin-walled structure test to obtain the strength variation coefficient is expensive, this paper is based on the actual measurement of the product information, the application of finite element simulation and analysis methods, comprehensive consideration of the material properties, structural dimensions and geometrical uncertainty factors, put forward a method for the study of strength variation coefficients of thin-walled structures based on multi-head CNN. Taking the multi-wall panel welded stiffened rocket tank cylinder section as the research object, the geometric imperfection of a single panel is used as a sub-sample, and the particle swarm optimisation based inter-wall panel connection coordination method is used to achieve the geometric imperfection random field construction; relying on a small number of experiments, a multi-head convolutional network structure is used to realise the fusion of uncertain features of material properties, structural dimensions and geometrical imperfections at different scales, to efficiently establish an ‘uncertainty-response’ mapping model, and to realise the prediction of strength variation coefficients at low cost. The research results show that the method is able to identify the complex action law of geometrical imperfection on structural bearing, and the accuracy of the prediction of bearing capacity is more than 99.2%; it can realise the accurate quantitative analysis of the coefficient of variation of the strength of thin-walled structure and its influencing factors, and the predicted coefficient of variation of the structural strength of the structure is reasonably encompassed by the upper limit of the test value.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113059"},"PeriodicalIF":5.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on wind-induced fatigue performance of standing seam metal cladding systems with anti-wind clips

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-02-18 DOI: 10.1016/j.tws.2025.113099

Qingshan Yang, Ze Wang, Min Liu, Qisheng Liang, Shidong Nie, Ruolin Liu, Wei Chen

{"title":"Experimental study on wind-induced fatigue performance of standing seam metal cladding systems with anti-wind clips","authors":"Qingshan Yang, Ze Wang, Min Liu, Qisheng Liang, Shidong Nie, Ruolin Liu, Wei Chen","doi":"10.1016/j.tws.2025.113099","DOIUrl":"10.1016/j.tws.2025.113099","url":null,"abstract":"<div><div>Standing seam metal cladding systems with anti-wind clips are extensively used in public buildings located in regions prone to strong winds. These reinforced seam-clip connections are susceptible to fatigue effects when subjected to long-term fluctuating wind loads. The complex mechanical behaviors of these connections contribute to a complex fatigue-induced failure mechanism, which is crucial for evaluating the fatigue performance of the systems but has received limited attention in existing studies. This study systematically analyzed the fatigue-induced failure mechanism of such systems using an air pressure box and prototype specimens. Quasi-static tests were conducted initially to determine the ultimate bearing capacity of the systems, followed by dynamic fatigue tests involving eight loading scenarios with various amplitudes. The study found significant differences between pull-out failures in static tests and tearing failures in dynamic tests. High stress concentration zones, particularly at metal sheet contacts with anti-wind clips and bending areas, can exacerbate damage accumulation under dynamic loads. These zones can initiate cracks when the cycle reaches 47 % of the fatigue life and expedite their propagation, ultimately leading to tearing failure. The dynamic response has been analyzed, with differences from the static response quantified. To assess the resistance capacity of systems to tearing failures, a fatigue life model was proposed to elucidate the relationship between load amplitudes and cycles. A diminishing trend in the model with the increase of amplitudes indicates that the fatigue resistance capacity is susceptible to high load amplitudes. These findings can effectively evaluate the fatigue resistance capacity of the systems.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113099"},"PeriodicalIF":5.7,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analytical model for stress calculation of ultra-thin cobalt chromium L605 coronary stent

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-02-17 DOI: 10.1016/j.tws.2025.113097

Amr F. Mohamed , Chahinaz A. Saleh , Youngjae Chun , Chang Hun Kum , Jae Hwa Cho , Gyuhyun Jin , Sang Hyun An , Moataz Elsisy

{"title":"Analytical model for stress calculation of ultra-thin cobalt chromium L605 coronary stent","authors":"Amr F. Mohamed , Chahinaz A. Saleh , Youngjae Chun , Chang Hun Kum , Jae Hwa Cho , Gyuhyun Jin , Sang Hyun An , Moataz Elsisy","doi":"10.1016/j.tws.2025.113097","DOIUrl":"10.1016/j.tws.2025.113097","url":null,"abstract":"<div><div>Coronary stents play a vital role in interventional cardiology by preventing artery collapse and ensuring blood flow after angioplasty. These mesh-like devices have seen significant advancements in materials, design, and drug-eluting technologies to minimize restenosis and improve long-term outcomes. Despite extensive research on both balloon-expandable and self-expandable stents, there remains a notable lack of mathematical models specifically tailored to balloon-expandable stents. This study addresses that gap by introducing a novel analytical model based on curved beam theory and geometric relations, providing a rapid and reliable method for evaluating the elastoplastic behavior of balloon-expandable stents, particularly those with curved hinges. This offers a significant advantage in optimizing stent performance. The mechanical behavior of a newly designed ultra-thin cobalt chromium stent, as described in our previous research, is evaluated through comprehensive simulations using ANSYS Workbench. Finite Element Analysis (FEA) offers critical insights into stress, strain, and residual stress, with stress concentrations primarily located at the inner radius of the curved hinges. The close alignment between the analytical model and FEA results validates the model's accuracy. Furthermore, the model is used to examine the effect of geometric parameters, such as the number of circumferential cells and the length of connecting links, on stent performance. These insights help identify optimal design parameters for reducing stress.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113097"},"PeriodicalIF":5.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multistate transitions in bistable composite plates with and without broken orthogonal symmetry

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-02-17 DOI: 10.1016/j.tws.2025.113078

Kasarn Tichakorn, Sontipee Aimmanee

{"title":"Multistate transitions in bistable composite plates with and without broken orthogonal symmetry","authors":"Kasarn Tichakorn, Sontipee Aimmanee","doi":"10.1016/j.tws.2025.113078","DOIUrl":"10.1016/j.tws.2025.113078","url":null,"abstract":"<div><div>Symmetry breaking in the elastic instability of thin-walled structures has become a prominent topic in nonlinear science. In composite structures, this phenomenon can arise from various factors, such as non-uniform thickness, directional anisotropy, and material and geometric imperfections. Typically, symmetry breaking in bistable composite plates and shells manifests through the loss of bifurcation. However, bifurcation can be restored at critical points by precisely tuning external stimuli to counteract asymmetric behaviors. This study investigates the mechanisms behind the loss and recovery of bifurcation, aiming to achieve multistate transitions, including stable and snap-through transitions between two stable equilibria in both square and rectangular thermo-electro-elastic composite plates. The stability relationships are explored using a novel duplex Hamiltonian formalism, which surpasses the previous methodologies by integrating in-plane eigen-solutions from two permutating symplectic spaces. The out-of-plane displacement field is incorporated into the extremum conditions of the Hamiltonian energy density to ensure overall equilibrium. By selecting appropriate ratios of eigen-solutions from both symplectic spaces, this method achieves high accuracy in displacement and stress fields with rapid convergence. The duplex Hamiltonian framework can be utilized to efficiently generate three-dimensional stability diagrams, illustrating the folding equilibrium surfaces of deformation and energy in piezoelectric fiber-reinforced plates. These diagrams reveal the loss of bifurcation in square plates and the occurrence of pitchfork bifurcation in rectangular plates under electrical actions, offering several unintuitive alternative shape-changing strategies. This study provides a robust and adaptable analytical methodology for constructing morphological pathways in multistate transitions, identifying the minimum energy barrier and energy-efficient transition paths within nonlinear structural continua.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113078"},"PeriodicalIF":5.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exact closed-form solution for free vibration of laterally discretely restrained arches with a thin-walled section

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-02-17 DOI: 10.1016/j.tws.2025.113091

Longkai Chen, Chao Zhang

{"title":"Exact closed-form solution for free vibration of laterally discretely restrained arches with a thin-walled section","authors":"Longkai Chen, Chao Zhang","doi":"10.1016/j.tws.2025.113091","DOIUrl":"10.1016/j.tws.2025.113091","url":null,"abstract":"<div><div>Arches are often connected to other structural members, introducing elastic restraints that enhance out-of-plane vibration performance. While existing literature primarily focuses on translational and torsional restraints, warping and minor axis rotational restraints also play a role in practice, yet their influence on vibrations remains underexplored. This paper employs the Laplace transform method (LTM) to derive exact closed-form solutions for the free vibration of discretely restrained arches (DRAs). The study accounts for arbitrary restraint positions, four types of restraints (translational, torsional, warping, and minor axis rotational), and general boundary conditions. The LTM is applied to derive general solutions for the mode shapes and frequencies of DRAs across the entire domain, eliminating the need for beam partitioning, Green's functions, or Lagrange multipliers. Numerical calculations, validated against results from existing literature and finite element methods, confirm the effectiveness of the proposed solution. The study thoroughly examines the influence of restraint parameters (type, stiffness, position, and number) on the modal characteristics of a DRA, with Courant's maximum-minimum principle being demonstrated in the curved beam/arch structures. An exact method is employed to efficiently determine the critical stiffness that maximizes the fundamental frequency in arches with multiple discrete lateral translational and torsional restraints. The findings are significant for optimizing restraint and dynamic analysis of DRA structures.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113091"},"PeriodicalIF":5.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A deterministic method using boundary inclination imperfections for prediction of buckling loads in cylindrical shells

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-02-17 DOI: 10.1016/j.tws.2025.113098

Dan He , Shouyu Zhang , Yunlong Ma , Huiping Wang , Cheng Huang

{"title":"A deterministic method using boundary inclination imperfections for prediction of buckling loads in cylindrical shells","authors":"Dan He , Shouyu Zhang , Yunlong Ma , Huiping Wang , Cheng Huang","doi":"10.1016/j.tws.2025.113098","DOIUrl":"10.1016/j.tws.2025.113098","url":null,"abstract":"<div><div>Thin-walled cylindrical shells are highly prone to buckling under axial compression. Due to their extreme sensitivity to imperfections, experimentally observed buckling loads often fall significantly below theoretical predictions, emphasizing the critical importance of accurate buckling load estimation. This study proposes a novel deterministic approach—the Boundary Inclination Imperfection Method (BIIM)—for predicting the axial compression buckling load of thin-walled cylindrical shells. This method incorporates deviations in end faces or loading platens and accounts for manufacturing tolerances as imperfection amplitudes in finite element models. Using this approach, the elastic and elastic-plastic buckling behaviors of isotropic and stiffened cylindrical shells were analyzed. The results were compared with those obtained from conventional methods, including NASA SP-8007, the Geometric Nonlinear Buckling Analysis (GNBA), and the Single Boundary Perturbation Approach (SBPA), as well as experimental data. The findings demonstrate that the proposed method accurately predicts both buckling loads and buckling modes, showing excellent agreement with experimental results. This methodology overcomes the limitations of traditional approaches, which are unsuitable for elastic-plastic buckling analysis or produce overly conservative predictions.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113098"},"PeriodicalIF":5.7,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental study on flexural buckling of stainless clad steel long columns with welded box-sections under axial compression

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-02-16 DOI: 10.1016/j.tws.2025.113096

Meijing Liu , Shenggang Fan , Daoyang Dong , Jiahui Zhao , Yiwen Wu

{"title":"Experimental study on flexural buckling of stainless clad steel long columns with welded box-sections under axial compression","authors":"Meijing Liu , Shenggang Fan , Daoyang Dong , Jiahui Zhao , Yiwen Wu","doi":"10.1016/j.tws.2025.113096","DOIUrl":"10.1016/j.tws.2025.113096","url":null,"abstract":"<div><div>Due to the extreme lack of reports on the global stability of stainless clad steel columns, axial compression tests were conducted on ten long columns with welded box-sections to investigate the global stability performance and supplement relevant data. The connections between the flanges and webs were made using single-sided V-groove full-penetration welding. Precise 3D scanning and calculations were carried out to assess the global bending, twisting, distortional and local imperfections. The global bending imperfections exhibited an approximate sine wave distribution along the column length, with small amplitudes of less than 1/1000 of the specimen length. The failure modes, load–axial displacement curves, load–lateral displacement curves, load–rotation curves, load–axial strain curves, initial stiffness and ultimate bearing capacity were obtained and thoroughly analysed. All specimens failed due to global bending instability. The load–displacement curves followed a similar pattern, consisting of linear elastic, nonlinear and descending stages. Strain measurements indicated that most specimens reached their ultimate load with plastic deformation occurring across the gross cross section, indicating elastic-plastic instability. Based on the test results, current design methods in the European, Chinese and American standards for stainless steel and carbon steel structures were evaluated. Although, some of the design curves, such as the class b curve in GB 50,017–2017 and design curve for duplex stainless steel in CECS 410: 2015, can better predict the experimental results, most design curves have significant deviations, and the smaller the regularized slenderness ratio, the more obvious the error.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113096"},"PeriodicalIF":5.7,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A model test method of monopile-type offshore wind turbines subjected to floating ice

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-02-15 DOI: 10.1016/j.tws.2025.113095

Yingzhou Liu , Wei Shi , Jijian Lian , Xin Li , Ye Yao , Constantine Michailides , Li Zhou , Peng Lu

{"title":"A model test method of monopile-type offshore wind turbines subjected to floating ice","authors":"Yingzhou Liu , Wei Shi , Jijian Lian , Xin Li , Ye Yao , Constantine Michailides , Li Zhou , Peng Lu","doi":"10.1016/j.tws.2025.113095","DOIUrl":"10.1016/j.tws.2025.113095","url":null,"abstract":"<div><div>Assessing ice-induced vibration is critical in determining safe operation of offshore wind turbines (OWT). However, there is currently a lack of dynamic model experimental method of the fully coupled elastic OWT under combined wind-ice loadings. In the present paper results derived from an ice-monopile-type OWT interaction experimental campaign are presented. Aiming at the mismatch of traditional similar criteria caused by the two scale effects, an 1/75 scale monopile-type OWT physical model has been constructed based on the dynamic ice force similarity criterion which is proposed within the present paper, and model ice is fabricated and verified. Furthermore, the corresponding ice dynamic testing technology is proposed by utilizing fiber grating dynamic ice force sensors, and the wind-ice simultaneous loading simulation test system is developed and used during tests for typical operational and parked states of the OWT. Ice typical failure modes, as well as, the ice-induced vibration response characteristics of OWT structures during the interaction between sea ice and monopile are revealed. We show that the proposed dynamic model test technology of the aerodynamic-ice dynamics-elastic coupled wind turbine can be effectively used as a experimental solution for evaluating the dynamic ice force and revealing the ice-induced vibration mechanism of OWTs.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113095"},"PeriodicalIF":5.7,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical behavior of partially concrete-encased I-beams with corrugated steel webs

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-02-15 DOI: 10.1016/j.tws.2025.113082

Ahmed S. Elamary , I.A. Sharaky , Y. Alharthi , Man Zhou

{"title":"Mechanical behavior of partially concrete-encased I-beams with corrugated steel webs","authors":"Ahmed S. Elamary , I.A. Sharaky , Y. Alharthi , Man Zhou","doi":"10.1016/j.tws.2025.113082","DOIUrl":"10.1016/j.tws.2025.113082","url":null,"abstract":"<div><div>In order to improve the local buckling resistance of the top flange in beams with corrugated steel webs (CSWs), it is common practice to use composite section with concrete slab over the top flange. In case of bare steel girder new techniques presented in this paper by encasing the CSWs with concrete, particularly in areas where the maximum flange outstanding lengths are present. This study examines the behavior of Partially Concrete-Encased CWs in prismatic I-beams (PCECWs) through experimental, theoretical, and finite element (FE) simulation. A new method is suggested in this study to strengthen the flexural zone of CSWs by introducing concrete in specific places. Initial tests were carried out on four specimens with different shear spans to analyze the beams' failure mode. The ultimate capacity of the bare steel specimens was compared with two different standards. Subsequently, FEMs were developed, considering material and geometric nonlinearity, and were validated using experimental data. Additionally, parametric studies were conducted on PCECWs with varying parameters. The results assured that incorporating concrete in both zones could significantly improve the beam's ability to withstand bending moments and shear forces with a load enhancement of 25 % over that of its bare beam. In contrast, the positioning of concrete in the combined of maximum shear and bending area only had a small effect on the ultimate capacity as the failure occurred in the pure bending zone. Furthermore, achieving the maximum flexural strength of PCECWs involves strategically placing concrete along the beam length rather than covering the entire length.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113082"},"PeriodicalIF":5.7,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermo-flexible coupled modeling and active control of thermally induced vibrations for a flexible plate

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-02-15 DOI: 10.1016/j.tws.2025.113092

Xuan Sun, Jiaxi Jin, Zhaobo Chen

{"title":"Thermo-flexible coupled modeling and active control of thermally induced vibrations for a flexible plate","authors":"Xuan Sun, Jiaxi Jin, Zhaobo Chen","doi":"10.1016/j.tws.2025.113092","DOIUrl":"10.1016/j.tws.2025.113092","url":null,"abstract":"<div><div>Flexible spacecraft exhibit thermal-structural coupled effects in space thermal environment, leading to issues such as thermally induced deformations and vibrations. It is crucial to accurately predict the thermally induced dynamic behaviors of space structures and to actively control them. Accordingly, an integrated computational framework is constructed to work out the multi-physics coupled problem by synchronously solving the displacement and temperature fields. Firstly, the coupled thermoelasticity of the model is characterized by the thermo-flexible fully parameterized absolute nodal coordinate formulation (ANCF), wherein temperature gradients, utilized as nodal coordinates, are directly employed to calculate the temperature difference between arbitrary points. The viscoelastic constitutive relationship of the material is considered based on the Kelvin-Voigt model. Secondly, a comprehensive thermal analysis of the complicated space environment is conducted, and the transient heat conduction equation incorporating thermal radiation is derived via the weighted residual method. Furthermore, several numerical examples are analyzed, and corresponding finite element models are established to validate the effectiveness and accuracy of the developed coupling method. Subsequently, the temperature gradient feedback (TGF) control law is established by employing thermal actuators mounted on the structure's surface. Controlling thermal bending moments, generated by the temperature gradients resulting from the heat fluxes of the heaters, are used for active vibration suppression. Finally, the effects of different parameters on thermally induced vibrations in a cantilevered plate and corresponding active control strategies are examined. The findings in this work provide theoretical foundations and practical significance for predicting and actively controlling thermally induced responses in large flexible space structures.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113092"},"PeriodicalIF":5.7,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0