Computers & Structures最新文献_第2页

Bayesian updating using accelerated Hamiltonian Monte Carlo with gradient-enhanced Kriging model 基于梯度增强Kriging模型的加速哈密顿蒙特卡罗贝叶斯更新

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-01-15 DOI: 10.1016/j.compstruc.2024.107598

Qiang Li, Pinghe Ni, Xiuli Du, Qiang Han, Kun Xu, Yulei Bai

{"title":"Bayesian updating using accelerated Hamiltonian Monte Carlo with gradient-enhanced Kriging model","authors":"Qiang Li, Pinghe Ni, Xiuli Du, Qiang Han, Kun Xu, Yulei Bai","doi":"10.1016/j.compstruc.2024.107598","DOIUrl":"10.1016/j.compstruc.2024.107598","url":null,"abstract":"<div><div>Bayesian methods have been widely used to improve the accuracy of finite element model in civil engineering. However, Bayesian methods generally suffer from the computational complexity involved in accurately identifying the posterior distribution. To address this issue, this paper proposes a novel method by combining the Hamiltonian Monte Carlo (HMC) algorithm with the gradient-enhanced Kriging (GEK) model, termed HMC-GEK, for more efficient model updating. The proposed method uses the potential function and gradient information generated during the burn-in phase of the HMC to train the GEK model. By replacing high-cost potential function with the GEK model, the original HMC sampling process is accelerated. An eight-story frame structure and a Y-shaped arch bridge are used to validate the accuracy and efficiency of the proposed method. Furthermore, the HMC-GEK method has been employed to identify damage of a real eight-story steel frame structure. Compared with the HMC method with the traditional Kriging model, HMC-GEK makes more full use of the gradient information of the potential function and significantly improves the sample acceptance rate and computational efficiency. In addition, the successful application of the method in damage identification of the real structure demonstrates its value for engineering applications.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"307 ","pages":"Article 107598"},"PeriodicalIF":4.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142804473","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

Non-parametric ground motion model for displacement response spectra and Fling for Himalayan region using machine learning 基于机器学习的喜马拉雅地区位移响应谱和Fling非参数地震动模型

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-01-15 DOI: 10.1016/j.compstruc.2024.107626

Jyothi Yedulla, Ravi Kanth Sriwastav, S.T.G. Raghukanth

{"title":"Non-parametric ground motion model for displacement response spectra and Fling for Himalayan region using machine learning","authors":"Jyothi Yedulla, Ravi Kanth Sriwastav, S.T.G. Raghukanth","doi":"10.1016/j.compstruc.2024.107626","DOIUrl":"10.1016/j.compstruc.2024.107626","url":null,"abstract":"<div><div>Displacement response spectra (DRS) are crucial for seismic design as earthquake damage correlates more with displacements than forces. Previous efforts to develop attenuation relations for DRS have been largely approximate. Permanent displacement or Fling poses significant design, repair and rehabilitation challenges. Consideration of DRS and Fling in seismic design and performance assessment necessitates its accurate estimation. This paper presents the two Artificial Neural Network (ANN)-based non-parametric Ground Motion Models (GMMs). The first model predicts DRS for horizontal and vertical spectral ordinates. The second model focuses on predicting the Fling step in fault-parallel, fault-normal and vertical components. Both the models are developed for the Himalayan region. Given the limited availability of recorded data, ground motion recorded in tectonically similar regions is also utilized to develop DRS GMM. The sparsely recorded Fling data in the Himalayan region is supplemented by additional Fling values simulated using a physics-based approach, alongside data recorded from tectonically similar regions. The simulated Fling values are validated against recorded Fling data. The performance of developed GMMs is compared with existing GMMs and seismic codes which demonstrated its satisfactory performance. The correlation coefficient for ordinates of DRS and Fling are reported to be greater than 0.86 and 0.80, respectively.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"307 ","pages":"Article 107626"},"PeriodicalIF":4.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841190","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

Improved hexahedral mesh generation from quadrilateral surface meshes 改进的六面体网格生成从四边形表面网格

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-01-15 DOI: 10.1016/j.compstruc.2024.107620

Jingchen Gao, Zhoufang Xiao, Shuwei Shen, Chenhao Xu, Jingjing Cai, Gang Xu

{"title":"Improved hexahedral mesh generation from quadrilateral surface meshes","authors":"Jingchen Gao, Zhoufang Xiao, Shuwei Shen, Chenhao Xu, Jingjing Cai, Gang Xu","doi":"10.1016/j.compstruc.2024.107620","DOIUrl":"10.1016/j.compstruc.2024.107620","url":null,"abstract":"<div><div>The quadrilateral surface mesh modification method based on dual cycle operations shows promising advantages in hexahedral mesh generation. However, as only simple cycle eliminations are considered, the existing methods can not handle complex surface meshes. In this study, an improved method based on cycle elimination is proposed for high-quality hexahedral mesh generation from a given quadrilateral mesh. For complex cycles, the dual cycles of a quadrilateral mesh are classified into different types, i.e., concave cycles, flat cycles and convex cycles, and processed accordingly. Then, a novel reversible chord removal operation is proposed to transform the concave cycles into convex cycles. Besides, the interlocked convex cycles are also split to new cycles suitable for elimination with the proposed chord removal operation. After that, the convex cycles can be eliminated. To find the best cycle for elimination, the convex cycles are ranked with geometric and topology information and the cycle with the highest rank is chosen to be eliminated. The above steps repeat until only a hexahedron exists and the final hexahedral mesh can be obtained by reversing the order of the surface modification operations. The effectiveness of the proposed method is validated with dozens of surface meshes.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"307 ","pages":"Article 107620"},"PeriodicalIF":4.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841193","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

An enrichment of Q4γs plate finite element using incomplete quadratic functions, an assumed energy orthogonality of Bergan’s free formulation, and mixed transverse shear strains 利用不完全二次函数、假定Bergan自由公式的能量正交性和混合横向剪切应变对q4 - γ - s板有限元进行了充实

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-01-15 DOI: 10.1016/j.compstruc.2024.107619

Andi Makarim Katili , Kai-Uwe Bletzinger , Irwan Katili

{"title":"An enrichment of Q4γs plate finite element using incomplete quadratic functions, an assumed energy orthogonality of Bergan’s free formulation, and mixed transverse shear strains","authors":"Andi Makarim Katili , Kai-Uwe Bletzinger , Irwan Katili","doi":"10.1016/j.compstruc.2024.107619","DOIUrl":"10.1016/j.compstruc.2024.107619","url":null,"abstract":"<div><div>This paper introduces a new quadrilateral plate element named DSPM4, which improves upon the previous Q4γ<em><sub>s</sub></em> element. The DSPM4 element has twelve DOFs and four temporary DOFs at the mid-sides of the element. The rotation functions βs are modified by adding an incomplete quadratic function to improve the bending performance. An orthogonality condition between the lower and higher-order bending energy is assumed to satisfy the constant bending patch test. The element development involves kinematic and mixed transverse shear strains. In the local normal-tangential (<em>n-s</em>) coordinate system of each side, the mixed transverse shear strains are obtained by combining the constitutive law for shear forces, equilibrium equations, the constitutive law for bending, and curvatures. The relationship between the temporary DOFs and the final DOFs at the corner nodes is established by equating the constant kinematic and mixed transverse shear strains in the direction cosines of each side of the element. As in the Q4γ<em><sub>s</sub></em> element, the discrete shear projection method is applied to avoid the shear-locking effect. Numerical analyses are conducted for thin and thick isotropic plates, and the results are compared with those of the DKMQ and MITC4 elements. Numerical results prove that the DSPM4 element is free of shear locking in thin and thick plates, has a proper rank, and provides better convergence behaviour than the Q4γ<sub>s</sub> element. Its performance in static and free vibration analyses of isotropic plates is highly comparable to the DKMQ element.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"307 ","pages":"Article 107619"},"PeriodicalIF":4.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841246","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

On the use of the inverse finite element method to enhance knowledge sharing in population-based structural health monitoring

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-01-15 DOI: 10.1016/j.compstruc.2024.107635

Giulia Delo , Rinto Roy , Keith Worden , Cecilia Surace

{"title":"On the use of the inverse finite element method to enhance knowledge sharing in population-based structural health monitoring","authors":"Giulia Delo , Rinto Roy , Keith Worden , Cecilia Surace","doi":"10.1016/j.compstruc.2024.107635","DOIUrl":"10.1016/j.compstruc.2024.107635","url":null,"abstract":"<div><div>Efficient Structural Health Monitoring (SHM) is critical for ensuring safety and improving the operation and maintenance of aerospace structures. This study focusses on advanced shape-sensing methods, such as the inverse Finite Element Method (iFEM), which can estimate the complete displacement field of a structure based on a restricted number of strain measurements, fostering continuous and real-time monitoring. This approach additionally provides valuable insights into the dynamic behaviour of a structure by extracting its Frequency Response Functions (FRFs) and modal properties to perform vibration-based SHM. However, effectively extending SHM to a fleet or population of structures would require a significant amount of data for each one, which may be unavailable or incomplete. A population-based Structural Health Monitoring (PBSHM) strategy can solve data scarcity by sharing knowledge between similar structures via transfer-learning algorithms. In PBSHM, handling data from diverse sources is paramount for achieving accurate results. Therefore, this study integrates iFEM into the PBSHM framework, enhancing knowledge transfer by harmonising fibre-optic strain measurements to vibration-based features and providing reliable source data to inform diagnostics on similar structures. The proposed approach is validated on a population of laboratory-scale steel aircraft subjected to specific operating and damage conditions tested using three different sensor setups.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"307 ","pages":"Article 107635"},"PeriodicalIF":4.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Open-source implementations and comparison of explicit and implicit crystal-plasticity finite element methods 开源实现和显式和隐式晶体塑性有限元方法的比较

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-01-15 DOI: 10.1016/j.compstruc.2024.107621

Hassan M. Asadkandi , Tomáš Mánik , Bjørn Holmedal , Odd Sture Hopperstad

引用次数: 0

Simultaneous optimization of topology and bi-material distribution of three-dimensional structures for addressing local heat accumulation in layer-upon-layer additive manufacturing process 面向层对层增材制造过程局部热积累的三维结构拓扑和双材料分布同步优化

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-01-15 DOI: 10.1016/j.compstruc.2024.107632

Nima Yaghoobi, Mohammad Hossein Abolbashari

{"title":"Simultaneous optimization of topology and bi-material distribution of three-dimensional structures for addressing local heat accumulation in layer-upon-layer additive manufacturing process","authors":"Nima Yaghoobi, Mohammad Hossein Abolbashari","doi":"10.1016/j.compstruc.2024.107632","DOIUrl":"10.1016/j.compstruc.2024.107632","url":null,"abstract":"<div><div>This paper introduces a novel approach based on a topology optimization (TO) model to efficiently distribute material phases for minimizing structural compliance and enhance local heat evacuation in additive manufacturing (AM). The approach simultaneously optimizes the structure for its intended function and behavior during layer-by-layer production. While AM allows intricate, topologically optimal multi-material designs, it often induces high temperatures and heat fluxes, risking part failure and compromising mechanical properties. To address this, a 3D gradient-based bi-material and functionally graded TO method is presented, considering total volume percentage and a thermal constraint based on temperatures of local sub-domains. The methodology involves density-based multi-material TO, interpolating elastic moduli, thermal conductivity, and heat flux based on proposed extensions of solid isotropic material with penalization method. Subsequently, a steady state analysis is performed in each sub-domain whose top element layer is exposed to a heat flux, simulating AM process. Both 2D and 3D numerical results demonstrate the contribution of the presented approach in preventing localized heating-induced geometrical patterns in AM. Additionally, the proposed method proves effective in producing superior designs without the need for sacrificial support structures in bi-material and functionally graded material designs, offering self-supported structures.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"307 ","pages":"Article 107632"},"PeriodicalIF":4.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142884291","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

Corrigendum to “Topology optimization of lattice structures for target band gaps with optimum volume fraction via Bloch-Floquet theory” [Comput. Struct. 307 (2025) 107601]

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-01-15 DOI: 10.1016/j.compstruc.2025.107649

F. Gómez-Silva , R. Zaera , R. Ortigosa , J. Martínez-Frutos

引用次数: 0

Extended spectral element formulation for modeling the propagation of nonlinear ultrasonic waves produced by multiple cracks in solid media 模拟固体介质中多裂纹产生的非线性超声波传播的扩展谱元公式

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-01-15 DOI: 10.1016/j.compstruc.2024.107639

Feilong Li , Yue Su , Xiaoqiang Sun

{"title":"Extended spectral element formulation for modeling the propagation of nonlinear ultrasonic waves produced by multiple cracks in solid media","authors":"Feilong Li , Yue Su , Xiaoqiang Sun","doi":"10.1016/j.compstruc.2024.107639","DOIUrl":"10.1016/j.compstruc.2024.107639","url":null,"abstract":"<div><div>This study presents a novel time-domain extended spectral element method (TD-XSEM) that can efficiently and accurately simulate interactions between ultrasonic waves and multiple randomly distributed and oriented cracks in solid materials. Compared to the conventional TD-SEM, which excels at large-scale structures but struggles with small discontinuities and contact issues, our TD-XSEM integrates linear finite elements to model these challenges effectively. Moreover, it preserves the efficiency of spectral elements in intact regions. Our unique frictional contact formulation employs the Heaviside function in discontinuous elements with enriched corner nodes. Rigorous validation against interactions of longitudinal waves with randomly distributed and oriented cracks shows superior convergence and accuracy of TD-XSEM. The proposed approach is further applied to capture second harmonic Lamb wave propagation and mixing bulk wave phenomena, demonstrating its feasibility and robustness in modeling complex interactions between ultrasonic waves and multiple random cracks. Implemented in C, TD-XSEM offers unprecedented accuracy and geometric flexibility in analyzing contact acoustic nonlinearity owing to multiple frictional cracks, contributing to the field of non-destructive testing. This study establishes a new framework for efficient and accurate wave-crack interaction simulations in complex solid structures.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"307 ","pages":"Article 107639"},"PeriodicalIF":4.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142911791","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

Topology optimization of lattice structures for target band gaps with optimum volume fraction via Bloch-Floquet theory 基于Bloch-Floquet理论的最佳体积分数目标带隙晶格结构拓扑优化

IF 4.4 2区工程技术

Computers & Structures Pub Date : 2025-01-15 DOI: 10.1016/j.compstruc.2024.107601

F. Gómez-Silva , R. Zaera , R. Ortigosa , J. Martínez-Frutos

{"title":"Topology optimization of lattice structures for target band gaps with optimum volume fraction via Bloch-Floquet theory","authors":"F. Gómez-Silva , R. Zaera , R. Ortigosa , J. Martínez-Frutos","doi":"10.1016/j.compstruc.2024.107601","DOIUrl":"10.1016/j.compstruc.2024.107601","url":null,"abstract":"<div><div>In this work, a topology optimization algorithm has been developed to design bi-material lattice structures showing a band gap around a target frequency, using just one unit cell through the application of Bloch-Floquet theorem. The Bidirectional Evolutionary Structural optimization (BESO) method has been employed, based on bi-material interpolation. A new objective function has been defined, which uses only the natural frequencies closest to the target one, regardless of their position with respect to the fundamental natural frequency. This reduces the computational cost by limiting the number of frequencies considered, and improves the robustness of the optimization process, as these frequencies adapt to changes in the distribution of materials within the domain, constantly encompassing the target frequency. In addition, a novel approach has been implemented to determine the optimal volume fraction of the materials forming the structure, a parameter typically predefined in other works before starting the optimization process. Consequently, the algorithm can autonomously identify the volume that produces the widest band gap around the target frequency. The algorithm has been evaluated for different cases of lattice structures formed by the periodic repetition of a unit cell in both 1D (1D-CR) and 2D (2D-CR), comparing some results with those obtained in other works through different approaches.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"307 ","pages":"Article 107601"},"PeriodicalIF":4.4,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142841245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0