Pub Date : 2026-02-10DOI: 10.1016/j.compstruc.2026.108138
Yaxin Zhen, Lei Chen, Ye Tang
{"title":"Application of Gaussian expansion element method to a wedge-shaped plate with an acoustic black hole","authors":"Yaxin Zhen, Lei Chen, Ye Tang","doi":"10.1016/j.compstruc.2026.108138","DOIUrl":"https://doi.org/10.1016/j.compstruc.2026.108138","url":null,"abstract":"","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"101 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146152959","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}
Pub Date : 2026-02-09DOI: 10.1016/j.compstruc.2026.108143
Zheng Zhou , Paolo Gardoni , Guohai Chen , Dixiong Yang
Although the inerter-based vibration absorbers system has proven effective for structural vibration control, their performance under stochastic near-fault ground motions needs further investigation. However, existing random vibration analysis methods present limitations in simultaneously determining stochastic responses and dynamic reliabilities of large-scale structures accurately and efficiently. This paper proposes a versatile and efficient framework via direct probability integral method to predict stochastic seismic responses and estimate the first-passage reliabilities of the high-rise frame-shear wall structure with tuned viscous mass dampers as inerter-based vibration absorbers. Firstly, two new stochastic spectrum-matched near-fault pulse-like ground motion models are constructed, which can separately synthesize the ground motions with fling-step and forward-directivity pulses. Then, a finite element model of high-rise frame-shear wall structure with tuned viscous mass dampers is developed, and the corresponding building structure with viscous dampers and the prototype structure without dampers are established for comparison. Subsequently, direct probability integral method with iterative sequence sampling strategy is suggested to accurately calculate the means and standard deviations of stochastic seismic responses and efficiently evaluate dynamic reliabilities of these three structures under two types of near-fault stochastic ground motions. Results indicate that the fling-step pulses significantly amplify stochastic acceleration responses, consequently causing severe damage to non-structural components, while the forward-directivity pulses substantially increase stochastic inter-story drifts, resulting in significant damage to structural components. The tuned viscous mass dampers can remarkably reduce stochastic seismic inter-story drifts and accelerations and improve dynamic reliability, with its energy dissipation performance superior to conventional viscous dampers.
{"title":"Stochastic dynamic analysis of high-rise frame-shear wall structure with tuned viscous mass dampers under spectrum-matched near-fault ground motions","authors":"Zheng Zhou , Paolo Gardoni , Guohai Chen , Dixiong Yang","doi":"10.1016/j.compstruc.2026.108143","DOIUrl":"10.1016/j.compstruc.2026.108143","url":null,"abstract":"<div><div>Although the inerter-based vibration absorbers system has proven effective for structural vibration control, their performance under stochastic near-fault ground motions needs further investigation. However, existing random vibration analysis methods present limitations in simultaneously determining stochastic responses and dynamic reliabilities of large-scale structures accurately and efficiently. This paper proposes a versatile and efficient framework via direct probability integral method to predict stochastic seismic responses and estimate the first-passage reliabilities of the high-rise frame-shear wall structure with tuned viscous mass dampers as inerter-based vibration absorbers. Firstly, two new stochastic spectrum-matched near-fault pulse-like ground motion models are constructed, which can separately synthesize the ground motions with fling-step and forward-directivity pulses. Then, a finite element model of high-rise frame-shear wall structure with tuned viscous mass dampers is developed, and the corresponding building structure with viscous dampers and the prototype structure without dampers are established for comparison. Subsequently, direct probability integral method with iterative sequence sampling strategy is suggested to accurately calculate the means and standard deviations of stochastic seismic responses and efficiently evaluate dynamic reliabilities of these three structures under two types of near-fault stochastic ground motions. Results indicate that the fling-step pulses significantly amplify stochastic acceleration responses, consequently causing severe damage to non-structural components, while the forward-directivity pulses substantially increase stochastic inter-story drifts, resulting in significant damage to structural components. The tuned viscous mass dampers can remarkably reduce stochastic seismic inter-story drifts and accelerations and improve dynamic reliability, with its energy dissipation performance superior to conventional viscous dampers.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"323 ","pages":"Article 108143"},"PeriodicalIF":4.8,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146135627","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}
Pub Date : 2026-02-04DOI: 10.1016/j.compstruc.2026.108139
Phuc L.H. Ho, Canh V. Le, Dung T. Tran, Changkye Lee
{"title":"Adaptive bubble-enriched face-based smoothed finite element method for 3D structural yield design","authors":"Phuc L.H. Ho, Canh V. Le, Dung T. Tran, Changkye Lee","doi":"10.1016/j.compstruc.2026.108139","DOIUrl":"https://doi.org/10.1016/j.compstruc.2026.108139","url":null,"abstract":"","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"42 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134535","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}
Pub Date : 2026-02-04DOI: 10.1016/j.compstruc.2026.108125
Delin Cao, Yan Zeng, Zeng Meng, Gang Li
{"title":"Robust topology optimization under uncertain transient loads based on unit impulse response functions","authors":"Delin Cao, Yan Zeng, Zeng Meng, Gang Li","doi":"10.1016/j.compstruc.2026.108125","DOIUrl":"https://doi.org/10.1016/j.compstruc.2026.108125","url":null,"abstract":"","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"211 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134541","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}
Pub Date : 2026-02-04DOI: 10.1016/j.compstruc.2026.108137
Yazhou Wang, Dean Maxam, Kumar Tamma, Nikolaus Adams, Tao Xue
{"title":"A new concept for initialization of single-step time integration algorithms: Eliminating pesky high-frequency overshooting behavior","authors":"Yazhou Wang, Dean Maxam, Kumar Tamma, Nikolaus Adams, Tao Xue","doi":"10.1016/j.compstruc.2026.108137","DOIUrl":"https://doi.org/10.1016/j.compstruc.2026.108137","url":null,"abstract":"","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"39 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134536","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}
Pub Date : 2026-02-03DOI: 10.1016/j.compstruc.2026.108102
Reza Najian Asl, Yusuke Yamazaki, Kianoosh Taghikhani, Mayu Muramatsu, Markus Apel, Shahed Rezaei
{"title":"A physics-informed meta-learning framework for the continuous solution of parametric PDEs on arbitrary geometries","authors":"Reza Najian Asl, Yusuke Yamazaki, Kianoosh Taghikhani, Mayu Muramatsu, Markus Apel, Shahed Rezaei","doi":"10.1016/j.compstruc.2026.108102","DOIUrl":"https://doi.org/10.1016/j.compstruc.2026.108102","url":null,"abstract":"","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"5 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146110194","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}
Pub Date : 2026-02-03DOI: 10.1016/j.compstruc.2026.108124
Rohit Satish Patil, Zhilin Han, Sofia G. Mogilevskaya
{"title":"The isogeometric boundary element algorithm for solving the plane strain problem of an elastic matrix containing an open material surface of arbitrary shape","authors":"Rohit Satish Patil, Zhilin Han, Sofia G. Mogilevskaya","doi":"10.1016/j.compstruc.2026.108124","DOIUrl":"https://doi.org/10.1016/j.compstruc.2026.108124","url":null,"abstract":"","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"117 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2026-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146110193","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}
Pub Date : 2026-02-01DOI: 10.1016/j.compstruc.2026.108113
Wenxiong Li , Jiayuan Huang , Suiyin Chen , Gengying Li , Jianhua Wen
Efficient structural reanalysis for high-rank modifications is of significant importance in engineering computations that involve repeated solution of equilibrium equations, such as structural optimization and nonlinear analysis. This paper proposes a novel reanalysis method based on separation and reconstruction operations for structures with large-scale modifications. The core idea is to replace the solution of the structural equations corresponding to large-scale modifications with a sequence of solutions for locally modified structures. Consequently, the displacement solution of the modified structure can be reconstructed by aggregating the solutions from these locally modified structures. In the implementation, the relationship between each locally modified structure and the large-scale modified structure is formally characterized using high-dimensional model representation, and the reanalysis of locally modified structures is performed through an efficient computational framework that incorporates system reduction and preconditioned iterative solvers. To mitigate the errors arising from the omission of higher-order terms, a correction mechanism is introduced to eliminate residual errors in the equilibrium equations, thereby ensuring the accuracy of displacement solutions. The efficacy and computational advantages of the proposed method are demonstrated through numerical experiments. The results confirm that the method exhibits superior performance in handling structural reanalysis problems involving both large-scale modifications and local modifications.
{"title":"Structural reanalysis method based on separation-reconstruction mode for structures with large-scale modifications","authors":"Wenxiong Li , Jiayuan Huang , Suiyin Chen , Gengying Li , Jianhua Wen","doi":"10.1016/j.compstruc.2026.108113","DOIUrl":"10.1016/j.compstruc.2026.108113","url":null,"abstract":"<div><div>Efficient structural reanalysis for high-rank modifications is of significant importance in engineering computations that involve repeated solution of equilibrium equations, such as structural optimization and nonlinear analysis. This paper proposes a novel reanalysis method based on separation and reconstruction operations for structures with large-scale modifications. The core idea is to replace the solution of the structural equations corresponding to large-scale modifications with a sequence of solutions for locally modified structures. Consequently, the displacement solution of the modified structure can be reconstructed by aggregating the solutions from these locally modified structures. In the implementation, the relationship between each locally modified structure and the large-scale modified structure is formally characterized using high-dimensional model representation, and the reanalysis of locally modified structures is performed through an efficient computational framework that incorporates system reduction and preconditioned iterative solvers. To mitigate the errors arising from the omission of higher-order terms, a correction mechanism is introduced to eliminate residual errors in the equilibrium equations, thereby ensuring the accuracy of displacement solutions. The efficacy and computational advantages of the proposed method are demonstrated through numerical experiments. The results confirm that the method exhibits superior performance in handling structural reanalysis problems involving both large-scale modifications and local modifications.</div></div>","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"322 ","pages":"Article 108113"},"PeriodicalIF":4.8,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146071719","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}
Pub Date : 2026-02-01DOI: 10.1016/j.compstruc.2026.108123
Mohamed Elsayed Nassar , Ali Kandil , Andrey Nasedkin
<div><div>Polarization is a key stage in the manufacture of piezoelectric materials/composites. In a dense piezoceramic material, it is usually uniform with the polarization vector directed along the polarization axis. However, in non-uniform piezoceramic materials, such as piezocomposites with pores or inclusions, the polarization field is non-uniform and can significantly affect the properties of the composite. The heterogeneity of the polarization field is especially pronounced in piezocomposites with conductive inclusions or in porous composites with metal particles deposited on the pore boundaries. This study explores how the polarization process affects the primary elastic, piezoelectric, and dielectric coefficients of two piezoelectric composites, PZT–Air and PZT–Thin Metal Layer–Air (PZT–TML–Air). It is worth noting that the metal phase in PZT–TML–Air is a very thin layer around the outside surface of each pore, therefore the electrical conductivity characteristics are the primary influence of this layer, and the elastic properties of the metal are not significant. Therefore, the PZT–TML–Air composite can be considered as a two-phase material. A numerical homogenization approach including finite element analysis, representative volume element (RVE), perfect contact between different phases, linear essential boundary conditions, and the Hill-Mendel’s principle was employed to calculate the equivalent properties. A new random RVE, applicable to diverse two-phase dispersed composites, and an algorithm for its quick creation were introduced. This RVE is a cubic piezoelectric matrix with randomly distributed spherical inclusions of various volumes. It has a fill factor of up to 50%. We used two simplified strategies for determining inhomogeneous properties for the piezoceramic matrix, which are associated with the orientations of element coordinate systems (ECS) with inhomogeneous polarization fields. The first method solely analyzes inhomogeneities caused by ECS rotations, whereas the second takes into consideration changes in material moduli magnitudes and ECS directions caused by the polarization field. The polarization vectors were determined by solving the corresponding dielectric problem using the finite element approach. To carry out the computations, a set of programs for the ANSYS Mechanical APDL package was created, allowing for the automation of all steps of modeling and determining equivalent moduli. Therefore, the following procedures were automated for the most complicated instance of the PZT–TML-Air composite with non-uniform polarization, accounting for the change in the moduli and orientations of the ECS: computation of the moduli of non-uniformly polarized piezoelectric ceramics; construction of the RVE with specified properties and the finite element mesh; definition of ECS and polarization vector for each finite element; solution of a set of boundary value problems for a non-uniform piezoelectric material with post-processo
极化是压电材料/复合材料制造的关键阶段。在致密的压电陶瓷材料中，它通常是均匀的，偏振矢量沿着偏振轴方向。然而，在非均匀的压电陶瓷材料中，如带有孔隙或夹杂的压电复合材料，极化场是不均匀的，可以显著影响复合材料的性能。极化场的非均质性在含有导电夹杂的压电复合材料或在孔隙边界沉积金属颗粒的多孔复合材料中表现得尤为明显。本研究探讨极化过程如何影响PZT-Air和PZT-Thin Metal Layer-Air （PZT-TML-Air）两种压电复合材料的初级弹性系数、压电系数和介电系数。值得注意的是，PZT-TML-Air中的金属相是围绕每个孔外表面的非常薄的一层，因此电导率特性是该层的主要影响因素，金属的弹性性能不显著。因此，PZT-TML-Air复合材料可以看作是一种两相材料。采用有限元分析、代表性体积单元（RVE）、相间完美接触、线性基本边界条件和Hill-Mendel原理等数值均匀化方法计算等效性质。介绍了一种适用于多种两相分散复合材料的随机RVE及其快速生成算法。该RVE是具有随机分布的不同体积球形夹杂的立方压电基体。它的填充系数高达50%。我们使用两种简化策略来确定压电陶瓷矩阵的非均匀性，这些非均匀性与具有非均匀极化场的单元坐标系（ECS）的取向有关。第一种方法只分析了ECS旋转引起的不均匀性，而第二种方法考虑了极化场引起的材料模量和ECS方向的变化。采用有限元法求解相应的介电问题，确定极化矢量。为了进行计算，为ANSYS Mechanical APDL软件包创建了一套程序，允许自动化建模和确定等效模量的所有步骤。因此，对于最复杂的具有非均匀极化的PZT-TML-Air复合材料实例，考虑到ECS模量和取向的变化，自动执行以下步骤：计算非均匀极化压电陶瓷的模量；构造具有特定属性的RVE及有限元网格；定义每个有限元的ECS和极化矢量；基于平均单元应力分量和电感应矢量的等效模量后处理方法求解非均匀压电材料边值问题并计算了各种压电模量和优值。当考虑均匀极化场时，采用分析Mori-Tanaka均质技术对结果进行验证。由于极化矢量的微尺度色散，导电相的存在极大地影响了PZT-TML-Air的有效压电性能。计算结果表明，考虑极化场的不均匀性对于精确建模PZT-TML-Air复合材料至关重要，特别是当极化模型考虑了极化矢量的大小和方向时。因此，与均匀极化模型相比，流体静力学参数的变化可增加1.5倍。结果还表明，横向压电常数d31和转导系数TC31=d312/ε33T均有显著改善。这意味着压电复合材料PZT-TML-Air可以有效地用于横向传感和驱动应用以及水听器应用。
{"title":"Microstructural characterization of PZT–thin metal layer–air and PZT–air composites employing a random representative volume element (RVE) and heterogeneous polarization models","authors":"Mohamed Elsayed Nassar , Ali Kandil , Andrey Nasedkin","doi":"10.1016/j.compstruc.2026.108123","DOIUrl":"10.1016/j.compstruc.2026.108123","url":null,"abstract":"<div><div>Polarization is a key stage in the manufacture of piezoelectric materials/composites. In a dense piezoceramic material, it is usually uniform with the polarization vector directed along the polarization axis. However, in non-uniform piezoceramic materials, such as piezocomposites with pores or inclusions, the polarization field is non-uniform and can significantly affect the properties of the composite. The heterogeneity of the polarization field is especially pronounced in piezocomposites with conductive inclusions or in porous composites with metal particles deposited on the pore boundaries. This study explores how the polarization process affects the primary elastic, piezoelectric, and dielectric coefficients of two piezoelectric composites, PZT–Air and PZT–Thin Metal Layer–Air (PZT–TML–Air). It is worth noting that the metal phase in PZT–TML–Air is a very thin layer around the outside surface of each pore, therefore the electrical conductivity characteristics are the primary influence of this layer, and the elastic properties of the metal are not significant. Therefore, the PZT–TML–Air composite can be considered as a two-phase material. A numerical homogenization approach including finite element analysis, representative volume element (RVE), perfect contact between different phases, linear essential boundary conditions, and the Hill-Mendel’s principle was employed to calculate the equivalent properties. A new random RVE, applicable to diverse two-phase dispersed composites, and an algorithm for its quick creation were introduced. This RVE is a cubic piezoelectric matrix with randomly distributed spherical inclusions of various volumes. It has a fill factor of up to 50%. We used two simplified strategies for determining inhomogeneous properties for the piezoceramic matrix, which are associated with the orientations of element coordinate systems (ECS) with inhomogeneous polarization fields. The first method solely analyzes inhomogeneities caused by ECS rotations, whereas the second takes into consideration changes in material moduli magnitudes and ECS directions caused by the polarization field. The polarization vectors were determined by solving the corresponding dielectric problem using the finite element approach. To carry out the computations, a set of programs for the ANSYS Mechanical APDL package was created, allowing for the automation of all steps of modeling and determining equivalent moduli. Therefore, the following procedures were automated for the most complicated instance of the PZT–TML-Air composite with non-uniform polarization, accounting for the change in the moduli and orientations of the ECS: computation of the moduli of non-uniformly polarized piezoelectric ceramics; construction of the RVE with specified properties and the finite element mesh; definition of ECS and polarization vector for each finite element; solution of a set of boundary value problems for a non-uniform piezoelectric material with post-processo","PeriodicalId":50626,"journal":{"name":"Computers & Structures","volume":"322 ","pages":"Article 108123"},"PeriodicalIF":4.8,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146072492","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}
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