European Journal of Mechanics A-Solids最新文献

A modified low cycle fatigue Chaboche model for irradiation hardening behaviour of EUROFER97 at elevated temperatures 高温辐照硬化的修正低周疲劳Chaboche模型

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-05-27 DOI: 10.1016/j.euromechsol.2025.105737

Jianxin Liu , Xiaowei Wang , Aleksandr Zinovev , Dmitry Terentyev , Lihua Wang , Magd Abdel Wahab

{"title":"A modified low cycle fatigue Chaboche model for irradiation hardening behaviour of EUROFER97 at elevated temperatures","authors":"Jianxin Liu , Xiaowei Wang , Aleksandr Zinovev , Dmitry Terentyev , Lihua Wang , Magd Abdel Wahab","doi":"10.1016/j.euromechsol.2025.105737","DOIUrl":"10.1016/j.euromechsol.2025.105737","url":null,"abstract":"<div><div>This study investigates the irradiation hardening mechanical behaviour of EUROFER97, a Reduced Activation Ferritic/Martensitic (RAFM) steel, using a modified Chaboche model within the temperature range of 250–350 °C. Structural materials for nuclear fusion reactors must maintain their performance under neutron irradiation. However, EUROFER97 faces challenges such as irradiation-induced hardening and embrittlement at irradiation temperatures below 350 °C, which lead to reduced ductility and toughness. This research incorporates an irradiation hardening factor into a modified Chaboche constitutive model to accurately simulate EUROFER97's behaviour under irradiation. A unified viscoplastic model is employed for finite element analysis, with variable parameters used to better represent the material's stress-strain evolution during cyclic loading and irradiation-induced hardening. Simulations are conducted using ABAQUS, with a UMAT subroutine developed to simulate fatigue, and a hybrid acceleration strategy is adopted to accelerate the calculation of different stages of Low Cycle Fatigue (LCF). Key findings demonstrate that the modified Chaboche model effectively predicts the irradiation hardening and cyclic softening behaviour of EUROFER97 under various irradiation doses and strain amplitudes. The model's predictions are in good agreement with experimental data, capturing the stress-strain hysteresis loops and irradiation-induced changes in mechanical properties, thereby validating its applicability not only to EUROFER97 but also to other nuclear structural materials, such as F82H ferritic/martensitic steel. The contribution of this study lies in refining the Chaboche model by incorporating irradiation effects, providing a robust tool for predicting the mechanical behaviour of structural materials under irradiation, which is crucial for the safety and design of fusion reactor components.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"114 ","pages":"Article 105737"},"PeriodicalIF":4.4,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 macro-slipping in composite single-lap bolted joints with metal inserts 金属镶件复合材料单搭螺栓连接宏观滑移试验研究

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-05-27 DOI: 10.1016/j.euromechsol.2025.105735

Adeline Fau , Julie Lecomte , Jean-Baptiste Duga , Alain Daidié , Michel Leroy , Christophe Bois

{"title":"Experimental study on macro-slipping in composite single-lap bolted joints with metal inserts","authors":"Adeline Fau , Julie Lecomte , Jean-Baptiste Duga , Alain Daidié , Michel Leroy , Christophe Bois","doi":"10.1016/j.euromechsol.2025.105735","DOIUrl":"10.1016/j.euromechsol.2025.105735","url":null,"abstract":"<div><div>In a preloaded single-lap bolted joint, load transfer between the assembled parts takes place through friction between the parts and then, after slipping, by bolt bearing stress/shear. The maximum load before slipping can therefore be increased by improving the load transfer by adherence at the contact interface of the assembled parts. This can be achieved by optimizing the level of preload in the assembly and maximizing the friction between the assembled parts. In the case of composite parts, with low mechanical properties in the out-of-plane direction, high performance assemblies can be achieved by adding inserts into the holes. This paper proposes a macroscopic analysis of the assembly on load transfer by adherence and friction. An experimental approach is carried out to quantify the influence of the surface condition at the interface of assembled parts (metal inserts) on the load transfer. Several techniques are used to modify the characteristics of the contact interface: laser texturing with a concentric circular pattern or a cross hatch pattern, and the addition of a friction shim at the interface. The analysis is carried out on the macroscopic scale of the assembly, based on post-mortem observations of the surfaces in contact, to validate the global behaviour of the assembly. Compared to results for a machined surface, these results show an increase in the friction coefficient and therefore in the pre-slipping load for all the configurations proposed. However, the interposition of a friction shim provides interesting results, with an increase in the friction coefficient (+205 % for the static friction coefficient) compared to the reference surface condition. The effect of a disassembly-reassembly operation is also studied and the benefits of adding a friction shim to the load transfer are validated by a tensile test on a single-lap composite bolted joint.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"114 ","pages":"Article 105735"},"PeriodicalIF":4.4,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 and numerical study of topological valley transport in curved chiral honeycomb-like metastructures 弯曲手性蜂窝状元结构拓扑谷输运的实验与数值研究

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-05-27 DOI: 10.1016/j.euromechsol.2025.105738

Jian Zhu, Lang Zheng, Kaixiang Wang, Jiaxin Wu, Rui Zhang, Tianning Chen

{"title":"Experimental and numerical study of topological valley transport in curved chiral honeycomb-like metastructures","authors":"Jian Zhu, Lang Zheng, Kaixiang Wang, Jiaxin Wu, Rui Zhang, Tianning Chen","doi":"10.1016/j.euromechsol.2025.105738","DOIUrl":"10.1016/j.euromechsol.2025.105738","url":null,"abstract":"<div><div>Recent advances in topological states within artificially engineered structures have garnered significant attention, particularly due to their ability to facilitate robust wave transport without backscattering. The analysis of band structures and Dirac points of metastructures plays a critical role in understanding their topological properties. In this study, we investigate the dispersion relation and topological valley transport in curved honeycomb-like metastructures by manipulating the ligament curvature of the unit cell. We demonstrate that the chirality of the metastructures can serve as an additional design degree of freedom for creating honeycomb structures. By adjusting the ligament curvature and chirality of the unit cells, it is possible to control the node coefficients and break the space-inversion symmetry, thus enabling the closure and reopening of a lower-frequency band gap. Topological edge states emerge at the interface of two bulk structures with opposing chirality coefficients. Both numerical and experimental results show that the bulk metastructures exhibit a band gap where wave propagation is forbidden. The proposed curvature and chirality control approach for honeycomb-like metastructures may open new avenue for exploring topological insulators and devices in lower-frequency regions.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"114 ","pages":"Article 105738"},"PeriodicalIF":4.4,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Structural behaviour of dicyclopentadiene-based polymers (DCPD) and GFRP in the automotive sector 双环戊二烯基聚合物（DCPD）和GFRP在汽车行业的结构行为

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-05-26 DOI: 10.1016/j.euromechsol.2025.105732

Rogério F.F. Lopes , G. Cipriano , Hugo Mesquita , Pedro J.S.C.P. Sousa , P.M.G.P. Moreira

{"title":"Structural behaviour of dicyclopentadiene-based polymers (DCPD) and GFRP in the automotive sector","authors":"Rogério F.F. Lopes , G. Cipriano , Hugo Mesquita , Pedro J.S.C.P. Sousa , P.M.G.P. Moreira","doi":"10.1016/j.euromechsol.2025.105732","DOIUrl":"10.1016/j.euromechsol.2025.105732","url":null,"abstract":"<div><div>A thorough understanding of the components that make up a vehicle is crucial in the automotive industry. This work is part of a research project in which a single-deck coach was evaluated for structural integrity using an ECE R29 regulation adaptation. This research aims to evaluate the replacement of the current exterior panels made of glass-fibre-reinforced polymer (GFRP), with more environmentally friendly panels manufactured of dicyclopentadiene-based polymers (DCPD). To achieve this, the effectiveness and impact resistance of the different materials must be assessed.</div><div>The impact performance of the material may be predicted using a typical testing device that simulates small-scale collisions employing a pneumatic gas-gun setup capable of firing hard projectiles commonly applied in ballistics and aeronautics, highlighting the multidisciplinary nature of the study. A custom-designed firing mechanism was developed to evaluate materials by measuring their energy absorption and penetration capacity using 3D DIC. Post-impact analysis uses pulse thermography to characterise the damage from both piercing and non-piercing impacts.</div><div>The equipment designed for crashworthiness testing proved successful and shows potential for applications beyond the typical ballistic and aeronautical applications. The use of lock-in thermography enabled detailed fracture analysis. In terms of structural behaviour, DCPD was found to be a better candidate material for incorporating into the design of coaches when subjected to low velocities impact and similar energy under the ECE R29 regulation. However, for high-energy impacts (above 713 kJ), DCPD, when impacted by a spheric projectile, tends to fracture radially, making it inefficient for energy absorption. In such cases, GFRP is considered more capable of maintaining the integrity of the overall components.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"113 ","pages":"Article 105732"},"PeriodicalIF":4.4,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Refraction and reflection of localized static deformation in lattice materials 点阵材料局部静态变形的折射与反射

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-05-25 DOI: 10.1016/j.euromechsol.2025.105730

Aoxi Wang , Chang Qing Chen

{"title":"Refraction and reflection of localized static deformation in lattice materials","authors":"Aoxi Wang , Chang Qing Chen","doi":"10.1016/j.euromechsol.2025.105730","DOIUrl":"10.1016/j.euromechsol.2025.105730","url":null,"abstract":"<div><div>From echoes and shadows to rainbows and mirages, the reflection and refraction of waves at spatial interfaces are ubiquitous in our daily lives. There is growing interest in exploring wave scattering at a time boundary, where an abrupt change in material properties throughout the entire space occurs and incident waves are nonadiabatically time refracted and reflected. Although it is long believed that reflection and refraction are wave phenomena, recent advances in space-time duality show the feasibility of generalizing these concepts to static systems. Here, we unveil a synthetic time boundary (STB) in static systems. Unlike its dynamic counterpart, the STB has a vanishing width and is free from energy input, while allowing for arbitrary parameter switch. On this basis, we develop a framework of static refraction/reflection for load-induced deformation, with its spatial trajectory undergoing an abrupt deflection upon crossing the STB. Similar to coherent wave control in temporal metamaterials, static refraction/reflection at an STB facilitates the manipulation of localized deformation. Our study discloses an STB prevalent in lattice materials, laying the foundation for exploring refraction and reflection in static systems.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"113 ","pages":"Article 105730"},"PeriodicalIF":4.4,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Tunability of bandgaps in functionally graded piezoelectric plates with periodically shunting circuits 周期性并联功能梯度压电片带隙的可调性

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-05-22 DOI: 10.1016/j.euromechsol.2025.105701

Youqi Zhang , Jie Xu , Zheng Li , Kefu Huang

{"title":"Tunability of bandgaps in functionally graded piezoelectric plates with periodically shunting circuits","authors":"Youqi Zhang , Jie Xu , Zheng Li , Kefu Huang","doi":"10.1016/j.euromechsol.2025.105701","DOIUrl":"10.1016/j.euromechsol.2025.105701","url":null,"abstract":"<div><div>Piezoelectric metamaterials have exhibited the abilities to tune the propagations of guided waves by using external shunting circuits, and have shown great potential in structural vibration reduction and wave isolation. However, multi-physics coupling effects pose significant difficulty in theoretical analysis of functionally graded piezoelectric metamaterials. In this paper, the Stroh formalism is developed to theoretically investigate the dispersion relations of guided waves in functionally graded piezoelectric material (FGPM) plates with periodically shunting circuits. The effectiveness of the theoretical model is verified by the transmission spectrum calculated using the finite element method, and the effects of external circuits on the locally resonant bandgaps of guided waves are discussed. Results indicate that the locally resonant bandgaps of guided waves can be turned by adjusting the gradient index of FGPM plate or changing the electrical boundary conditions. This work offers capabilities for controlling guided wave propagation and could be helpful as a theoretical guidance for designing FGPM-based smart devices.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"113 ","pages":"Article 105701"},"PeriodicalIF":4.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144123580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Dynamic uncertainty analysis of rod-fastening rotor systems with rubbing effects using a Chebyshev interval method 用切比雪夫区间法分析具有摩擦效应的杆系转子系统的动态不确定性

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-05-22 DOI: 10.1016/j.euromechsol.2025.105725

Chongyang Wang , Zihang Li , Xilong Ji , Haoze Wang , Lihua Yang

{"title":"Dynamic uncertainty analysis of rod-fastening rotor systems with rubbing effects using a Chebyshev interval method","authors":"Chongyang Wang , Zihang Li , Xilong Ji , Haoze Wang , Lihua Yang","doi":"10.1016/j.euromechsol.2025.105725","DOIUrl":"10.1016/j.euromechsol.2025.105725","url":null,"abstract":"<div><div>The study investigates the uncertainty quantification and parameter influence of a rod-fastening combined rotor system considering rub-impact effects. A continuous-discrete coupled dynamic model incorporating rub-impact boundaries is formulated based on the Lagrange equation, and the strongly nonlinear dynamic response is solved using the Newmark-<em>β</em> numerical method. An interval propagation analytical framework based on Chebyshev polynomial expansion is proposed to establish an efficient parameter uncertainty quantification system. The accuracy of the model and interval algorithm is validated through experiments and Monte Carlo simulations. The results demonstrate that the Chebyshev interval algorithm effectively characterizes parameter uncertainty, significantly reduces the computational complexity of nonlinear analysis, and enables rapid estimation of the rotor system's interval response. Interval analysis reveals the mapping relationship between rub-impact parameters and nonlinear vibration characteristics. A parameter classification criterion is established based on the difference in influence pathways: Direct Response-Influencing Parameters (DRIP) and Natural Frequency-Influencing Parameters (NFIP). Numerical experiments indicate that NFIP parameters influence vibration characteristics indirectly by altering the system's natural frequency, whereas DRIP parameters directly affect the dynamic response. The parameter sensitivity index of rub-impact clearance is considerably greater than that of contact stiffness and friction coefficient, and rub-impact fault-related uncertainties exert a notable influence only within the rub-impact domain. The proposed quantification framework provides a quantitative engineering criterion for predicting rub-impact fault thresholds and tolerance band design in aero-engine rotor systems.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"113 ","pages":"Article 105725"},"PeriodicalIF":4.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Through-thickness modelling of metal rolling using multiple-scales asymptotics 基于多尺度渐近的金属轧制全厚建模

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-05-22 DOI: 10.1016/j.euromechsol.2025.105712

Mozhdeh Erfanian , Edward J. Brambley , Francis Flanagan , Doireann O’Kiely , Alison N. O’Connor

{"title":"Through-thickness modelling of metal rolling using multiple-scales asymptotics","authors":"Mozhdeh Erfanian , Edward J. Brambley , Francis Flanagan , Doireann O’Kiely , Alison N. O’Connor","doi":"10.1016/j.euromechsol.2025.105712","DOIUrl":"10.1016/j.euromechsol.2025.105712","url":null,"abstract":"<div><div>A new semi-analytic model of the metal rolling process is introduced, which, for the first time, is able to predict the through-thickness stress and strain oscillations present in long thin roll-gaps. The model is based on multiple-scales asymptotics, assuming a long thin roll-gap and a comparably small Coulomb friction coefficient. The leading-order solution varies only on a long lengthscale corresponding to the roll-gap length and matches with slab models. The next-order correction varies on both this long lengthscale and a short lengthscale associated with the workpiece thickness, and reveals rapid stress and strain oscillation both in the rolling direction and through the thickness. For this initial derivation, the model assumes a rigid perfectly-plastic material behaviour. Despite these strong assumptions, this model compares well with finite element simulations that employ more realistic material behaviour (including elasticity and strain hardening). These assumptions facilitate the simplest possible model to provide a foundational understanding of the complex through-thickness behaviour observed in the finite element simulations, while requiring an order of only seconds to compute. This model can form the foundation of further improved models with more complicated mechanics in the future. <span>Matlab</span> code for evaluating the model is provided in the supplementary material.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"113 ","pages":"Article 105712"},"PeriodicalIF":4.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144131757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Practical methods for the implementation of material strength into an Eulerian hydrocode 实用的方法实现材料的强度成欧拉氢码

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-05-22 DOI: 10.1016/j.euromechsol.2025.105689

M.D. Fitzgerald , D.E. Eakins , N. Petrinic , E. Leggett , N. Niasse , J.D. Pecover

{"title":"Practical methods for the implementation of material strength into an Eulerian hydrocode","authors":"M.D. Fitzgerald , D.E. Eakins , N. Petrinic , E. Leggett , N. Niasse , J.D. Pecover","doi":"10.1016/j.euromechsol.2025.105689","DOIUrl":"10.1016/j.euromechsol.2025.105689","url":null,"abstract":"<div><div>This study presents the framework and implementation of a material strength model within a two-step Eulerian solution scheme in the MHD hydrocode, B2. The techniques presented in this work provide practical solutions to problems encountered when modelling high strain-rate behaviour of solids in an Eulerian framework. Several novel methods developed in this work resulted in the accurate reproduction of a Taylor anvil-on-rod test in B2 without a complex and computationally expensive interface reconstruction technique. These methods include a complete algorithmic definition of the different components of the stress tensor, ensuring realistic behaviour in low-density mixed cells at the rod-vacuum boundary through a density dependent modification of the yield, implementing automatically generated slip conditions at part boundaries, and damping oscillating numerical instabilities induced by the inclusion of strength. The Taylor test served as a rigorous verification case for the strength model, demonstrating the efficacy of these novel methods. A cross-code comparison against the results of a Lagrangian simulation in Ansys AUTODYN, a well-benchmarked commercial code which employs Young’s Reconstruction, of the Taylor rod deformation revealed a close match with the rod profile predicted by B2. In this article, emphasis is placed on the practical details of the routines required to implement these corrections to facilitate the adoption of three-dimensional material strength models in other Eulerian hydrocodes.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"113 ","pages":"Article 105689"},"PeriodicalIF":4.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Analysis of the longitudinal coupled dynamic characteristics of shaft-shell system considering the lubrication of thrust bearing 考虑推力轴承润滑的轴壳系统纵向耦合动力特性分析

IF 4.4 2区工程技术

European Journal of Mechanics A-Solids Pub Date : 2025-05-21 DOI: 10.1016/j.euromechsol.2025.105726

Yaqi Tian , Cong Zhang , Lei Yang

{"title":"Analysis of the longitudinal coupled dynamic characteristics of shaft-shell system considering the lubrication of thrust bearing","authors":"Yaqi Tian , Cong Zhang , Lei Yang","doi":"10.1016/j.euromechsol.2025.105726","DOIUrl":"10.1016/j.euromechsol.2025.105726","url":null,"abstract":"<div><div>The propeller generates longitudinal pulsating forces in a non-uniform flow, transmitting through shaft-shell system and causing underwater acoustic radiation. The thrust bearing, as a key coupling component, exhibits variable stiffness and damping, affecting vibro-acoustic response of system. A numerical model based on fluid lubrication theory is developed to determine dynamic characteristics of thrust bearing oil film stiffness and damping. Analytical models for shell and shaft are created using Flügge's theory and Euler beam theory. The combined stiffness from oil film and bearing seat acts as a coupling parameter between shaft and shell, forming a semi-analytical dynamic model. This study examines the impact of thrust bearing dynamic characteristics on shaft-shell system's vibro-acoustic properties. Results show that at high rotational speeds, the increase in vibration and acoustic radiation is primarily due to growing excitation forces. Under constant excitation forces, higher rotational speeds enhance the lubrication performance of the thrust bearing, reducing vibrational energy transmission between shaft and shell. Increasing radius and circumferential width of bearing pads can enhance the lubrication performance of the thrust bearing and reduce vibro-acoustic radiation. Sensitivity analysis reveals that compared to circumferential width, the radius of bearing pads plays a more dominant role in determining both lubrication and vibro-acoustic performance. Increasing number of bearing pads may negatively impact lubrication of the thrust bearing, while it is beneficial for reducing vibration and noise.</div></div>","PeriodicalId":50483,"journal":{"name":"European Journal of Mechanics A-Solids","volume":"113 ","pages":"Article 105726"},"PeriodicalIF":4.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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