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Table of Content

Structural Design and Optimization

Submission Deadline: 31 January 2024 (closed) Submit to Special Issue

Guest Editors

Prof. Hongling Ye, Beijing University of Technology, China
Prof. Pin Wen, Wuhan University of Technology, China
Dr. Weiwei Wang, Peking University, China

Summary

The term Structural Optimization pertains to the procedure of identifying the optimal arrangement design of a structure, which complies with specific criteria while minimizing expenses or performance. This process involves utilizing mathematical algorithms and computer simulations to analyze and enhance various design parameters such as geometry, material properties, and other relevant factors. Structural optimization is a robust technique that promotes creative structural designs and enhances the overall efficiency of a structure. Due to the increasing demand for sustainable, efficient, and high-quality engineering structures, there is an urgent necessity to develop more comprehensive design approaches and propose innovative design concepts. Consequently, this special issue seeks to present the latest advancements in structural optimization, covering a broad range of topics, including but not restricted to:

 

• Multi-objective optimization

• Multi-disciplinary optimization

• Surrogate-based optimization

• Material/structure concurrent optimization

• Robust and reliability-based optimization

• Applications of innovative structural design

• Evolutionary Algorithms, swarm intelligence, nature and biologically inspired metaheuristics, etc. and their applications.

• Multidisciplinary structural design and optimization: surrogate modeling, inverse analysis, etc.

• Topology optimization

• Deep learning based innovative structural/material design and applications

• Reinforcement learning and optimization


Keywords

Topology optimization; Multiscale optimization; Computational mechanics; New structural optimization algorithm; Innovative structural design

Published Papers


  • Open Access

    ARTICLE

    A Deep Learning Approach to Shape Optimization Problems for Flexoelectric Materials Using the Isogeometric Finite Element Method

    Yu Cheng, Yajun Huang, Shuai Li, Zhongbin Zhou, Xiaohui Yuan, Yanming Xu
    CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.2, pp. 1935-1960, 2024, DOI:10.32604/cmes.2023.045668
    (This article belongs to this Special Issue: Structural Design and Optimization)
    Abstract A new approach for flexoelectric material shape optimization is proposed in this study. In this work, a proxy model based on artificial neural network (ANN) is used to solve the parameter optimization and shape optimization problems. To improve the fitting ability of the neural network, we use the idea of pre-training to determine the structure of the neural network and combine different optimizers for training. The isogeometric analysis-finite element method (IGA-FEM) is used to discretize the flexural theoretical formulas and obtain samples, which helps ANN to build a proxy model from the model shape to the target value. The effectiveness… More >

  • Open Access

    ARTICLE

    Multi-Scale Design and Optimization of Composite Material Structure for Heavy-Duty Truck Protection Device

    Yanhui Zhang, Lianhua Ma, Hailiang Su, Jirong Qin, Zhining Chen, Kaibiao Deng
    CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.2, pp. 1961-1980, 2024, DOI:10.32604/cmes.2023.045570
    (This article belongs to this Special Issue: Structural Design and Optimization)
    Abstract In this paper, to present a lightweight-developed front underrun protection device (FUPD) for heavy-duty trucks, plain weave carbon fiber reinforced plastic (CFRP) is used instead of the original high-strength steel. First, the mechanical and structural properties of plain carbon fiber composite anti-collision beams are comparatively analyzed from a multi-scale perspective. For studying the design capability of carbon fiber composite materials, we investigate the effects of TC-33 carbon fiber diameter (D), fiber yarn width (W) and height (H), and fiber yarn density (N) on the front underrun protective beam of carbon fiber composite materials. Based on the investigation, a material-structure matching… More >

  • Open Access

    ARTICLE

    On the Application of Mixed Models of Probability and Convex Set for Time-Variant Reliability Analysis

    Fangyi Li, Dachang Zhu, Huimin Shi
    CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.2, pp. 1981-1999, 2024, DOI:10.32604/cmes.2023.031332
    (This article belongs to this Special Issue: Structural Design and Optimization)
    Abstract In time-variant reliability problems, there are a lot of uncertain variables from different sources. Therefore, it is important to consider these uncertainties in engineering. In addition, time-variant reliability problems typically involve a complex multilevel nested optimization problem, which can result in an enormous amount of computation. To this end, this paper studies the time-variant reliability evaluation of structures with stochastic and bounded uncertainties using a mixed probability and convex set model. In this method, the stochastic process of a limit-state function with mixed uncertain parameters is first discretized and then converted into a time-independent reliability problem. Further, to solve the… More >

  • Open Access

    ARTICLE

    Topology Optimization of Metamaterial Microstructures for Negative Poisson’s Ratio under Large Deformation Using a Gradient-Free Method

    Weida Wu, Yiqiang Wang, Zhonghao Gao, Pai Liu
    CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.2, pp. 2001-2026, 2024, DOI:10.32604/cmes.2023.046670
    (This article belongs to this Special Issue: Structural Design and Optimization)
    Abstract Negative Poisson’s ratio (NPR) metamaterials are attractive for their unique mechanical behaviors and potential applications in deformation control and energy absorption. However, when subjected to significant stretching, NPR metamaterials designed under small strain assumption may experience a rapid degradation in NPR performance. To address this issue, this study aims to design metamaterials maintaining a targeted NPR under large deformation by taking advantage of the geometry nonlinearity mechanism. A representative periodic unit cell is modeled considering geometry nonlinearity, and its topology is designed using a gradient-free method. The unit cell microstructural topologies are described with the material-field series-expansion (MFSE) method. The… More >

  • Open Access

    ARTICLE

    Optimization of Center of Gravity Position and Anti-Wave Plate Angle of Amphibious Unmanned Vehicle Based on Orthogonal Experimental Method

    Deyong Shang, Xi Zhang, Fengqi Liang, Chunde Zhai, Hang Yang, Yanqi Niu
    CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.2, pp. 2027-2041, 2024, DOI:10.32604/cmes.2023.045750
    (This article belongs to this Special Issue: Structural Design and Optimization)
    Abstract When the amphibious vehicle navigates in water, the angle of the anti-wave plate and the position of the center of gravity greatly influence the navigation characteristics. In the relevant research on reducing the navigation resistance of amphibious vehicles by adjusting the angle of the anti-wave plate, there is a lack of scientific selection of parameters and reasonable research of simulation results by using mathematical methods, and the influence of the center of gravity position on navigation characteristics is not considered at the same time. To study the influence of the combinations of the angle of the anti-wave plate and the… More >

  • Open Access

    REVIEW

    An Overview of Sequential Approximation in Topology Optimization of Continuum Structure

    Kai Long, Ayesha Saeed, Jinhua Zhang, Yara Diaeldin, Feiyu Lu, Tao Tao, Yuhua Li, Pengwen Sun, Jinshun Yan
    CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.1, pp. 43-67, 2024, DOI:10.32604/cmes.2023.031538
    (This article belongs to this Special Issue: Structural Design and Optimization)
    Abstract This paper offers an extensive overview of the utilization of sequential approximate optimization approaches in the context of numerically simulated large-scale continuum structures. These structures, commonly encountered in engineering applications, often involve complex objective and constraint functions that cannot be readily expressed as explicit functions of the design variables. As a result, sequential approximation techniques have emerged as the preferred strategy for addressing a wide array of topology optimization challenges. Over the past several decades, topology optimization methods have been advanced remarkably and successfully applied to solve engineering problems incorporating diverse physical backgrounds. In comparison to the large-scale equation solution,… More >

  • Open Access

    ARTICLE

    Application of Isogeometric Analysis Method in Three-Dimensional Gear Contact Analysis

    Long Chen, Yan Yu, Yanpeng Shang, Zhonghou Wang, Jing Zhang
    CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.1, pp. 817-846, 2024, DOI:10.32604/cmes.2023.031595
    (This article belongs to this Special Issue: Structural Design and Optimization)
    Abstract Gears are pivotal in mechanical drives, and gear contact analysis is a typically difficult problem to solve. Emerging isogeometric analysis (IGA) methods have developed new ideas to solve this problem. In this paper, a three-dimensional body parametric gear model of IGA is established, and a theoretical formula is derived to realize single-tooth contact analysis. Results were benchmarked against those obtained from commercial software utilizing the finite element analysis (FEA) method to validate the accuracy of our approach. Our findings indicate that the IGA-based contact algorithm successfully met the Hertz contact test. When juxtaposed with the FEA approach, the IGA method… More >

    Graphic Abstract

    Application of Isogeometric Analysis Method in Three-Dimensional Gear Contact Analysis

  • Open Access

    ARTICLE

    A Subdivision-Based Combined Shape and Topology Optimization in Acoustics

    Chuang Lu, Leilei Chen, Jinling Luo, Haibo Chen
    CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.1, pp. 847-872, 2024, DOI:10.32604/cmes.2023.044446
    (This article belongs to this Special Issue: Structural Design and Optimization)
    Abstract We propose a combined shape and topology optimization approach in this research for 3D acoustics by using the isogeometric boundary element method with subdivision surfaces. The existing structural optimization methods mainly contain shape and topology schemes, with the former changing the surface geometric profile of the structure and the latter changing the material distribution topology or hole topology of the structure. In the present acoustic performance optimization, the coordinates of the control points in the subdivision surfaces fine mesh are selected as the shape design parameters of the structure, the artificial density of the sound absorbing material covered on the… More >

  • Open Access

    ARTICLE

    Web Layout Design of Large Cavity Structures Based on Topology Optimization

    Xiaoqiao Yang, Jialiang Sun, Dongping Jin
    CMES-Computer Modeling in Engineering & Sciences, Vol.138, No.3, pp. 2665-2689, 2024, DOI:10.32604/cmes.2023.031482
    (This article belongs to this Special Issue: Structural Design and Optimization)
    Abstract Large cavity structures are widely employed in aerospace engineering, such as thin-walled cylinders, blades and wings. Enhancing performance of aerial vehicles while reducing manufacturing costs and fuel consumption has become a focal point for contemporary researchers. Therefore, this paper aims to investigate the topology optimization of large cavity structures as a means to enhance their performance, safety, and efficiency. By using the variable density method, lightweight design is achieved without compromising structural strength. The optimization model considers both concentrated and distributed loads, and utilizes techniques like sensitivity filtering and projection to obtain a robust optimized configuration. The mechanical properties are… More >

  • Open Access

    ARTICLE

    Experimental and Numerical Investigation on High-Pressure Centrifugal Pumps: Ultimate Pressure Formulation, Fatigue Life Assessment and Topological Optimization of Discharge Section

    Abdourahamane Salifou Adam, Hatem Mrad, Haykel Marouani, Yasser Fouad
    CMES-Computer Modeling in Engineering & Sciences, Vol.137, No.3, pp. 2845-2865, 2023, DOI:10.32604/cmes.2023.030777
    (This article belongs to this Special Issue: Structural Design and Optimization)
    Abstract A high percentage of failure in pump elements originates from fatigue. This study focuses on the discharge section behavior, made of ductile iron, under dynamic load. An experimental protocol is established to collect the strain under pressurization and depressurization tests at specific locations. These experimental results are used to formulate the ultimate pressure expression function of the strain and the lateral surface of the discharge section and to validate finite element modeling. Fe-Safe is then used to assess the fatigue life cycle using different types of fatigue criteria (Coffin-Manson, Morrow, Goodman, and Soderberg). When the pressure is under 3000 PSI,… More >

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