New generation software of structural analysis and design optimization--JIFEX

Gu, Yingsong; Zhang, Hongwu; Guan, Zhenqun; Kang, Zhan; Liu, Yunpeng; Zhong, Wanxie

doi:10.12989/sem.1999.7.6.589

Cited by 12 publications

(5 citation statements)

References 4 publications

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“…The sequential linear programming algorithm is employed to solve this optimization problem and the sensitivity analysis is carried out for objective and constraint functions to make linear approximations. For piezoelectric truss structures, the complete numerical methods of the finite element analysis, the topological optimization on the placement of active bars, the feedback control, and the sensitivity analysis are implemented in applicable engineering software JIFEX [5]. Numerical examples are given in the paper to demonstrate the effectiveness of the methods and software.…”

mentioning

confidence: 99%

Optimal placement of piezoelectric active bars in vibration control by topological optimization

Zhao

Wang

2008

Acta Mech Sin

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A continuous variable optimization method and a topological optimization method are proposed for the vibration control of piezoelectric truss structures by means of the optimal placements of active bars. In this optimization model, a zero-one discrete variable is defined in order to solve the optimal placement of piezoelectric active bars. At the same time, the feedback gains are also optimized as continuous design variables. A two-phase procedure is proposed to solve the optimization problem. The sequential linear programming algorithm is used to solve optimization problem and the sensitivity analysis is carried out for objective and constraint functions to make linear approximations. On the basis of the Newmark time integration of structural transient dynamic responses, a new sensitivity analysis method is developed in this paper for the vibration control problem of piezoelectric truss structures with respect to various kinds of design variables. Numerical examples are given in the paper to demonstrate the effectiveness of the methods.

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mentioning

confidence: 99%

Optimal placement of piezoelectric active bars in vibration control by topological optimization

Zhao

Wang

2008

Acta Mech Sin

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“…Finite element software SAP2000 was used to establish a midstory-isolated structure considering SSI in sloping ground (Gu et al, 1999;Pala et al, 2008;Institute CBSD, 2012;Shang et al, 2012;Karabork et al, 2014;Jiang et al, 2018;Huang et al, 2020a). Solid elements were used to simulate the soil foundation, and the Mohr-Coulomb model was adopted.…”

Section: Model Establishmentmentioning

confidence: 99%

Seismic response of a mid-story-isolated structure considering soil–Structure interaction in sloping ground under three-dimensional earthquakes

Wan

Li²,

et al. 2023

Front. Earth Sci.

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A mid-story-isolated structure is developed from a base-isolated structure. Mid-story-isolated structures located in sloping ground have become a research hotspot in recent years. It is important to consider the soil–structure interaction (SSI) effects and multi-dimensional earthquakes on these structures. This paper established a model of the mid-story-isolated structure considering SSI in sloping ground. An elastic–plastic time history analysis was carried out under the one-dimensional (1D), two-dimensional (2D), and three-dimensional (3D) earthquakes. Under 3D earthquakes, the traditional 2D isolated bearing has limited damping capacity. Therefore, two kinds of 3D isolated bearings were designed. Results show that the seismic response of the mid-story-isolated structure considering SSI in sloping ground can be amplified compared with that of the mid-story-isolated structure without considering SSI. The seismic response of the structure under 3D earthquakes is more significant than that under 2D earthquakes and 1D earthquakes. For the two kinds of 3D isolated bearings, the minimum reduction rate of tensile and compressive stress is about 46% compared with that of the traditional 2D isolated bearings. When the 3D isolated bearings are used, the stress of the soil foundation decreases, which is more conducive to the stability of the soil foundation.

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“…Figure 3 shows the computational procedure of PEM combined with FEM and BEM for random acoustic radiation optimization. The above methods are implemented in the software JIFEX 34,35 for the structural acoustic radiation optimization. JIFEX is a general purpose finite element system that can be used for structural analysis and optimum design by modern computer hardware and software technologies.…”

Section: Structural Acoustic Design Optimization Modelmentioning

confidence: 99%

Design optimization of acoustic radiation from structures under random excitation

Liu¹,

Zhao²,

Shi³

2010

Noise Control Eng. J.

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Acoustic design optimization of structures subjected to random excitations is investigated in this paper. In this work, a Pseudo excitation method (PEM), an accurate and highly efficient algorithm series for structural stationary random response analysis, is extended to deal with random acoustic radiation problems. A boundary element method (BEM) and a finite element method (FEM) are combined with the PEM to calculate acoustic radiation from random excited structures. A design optimization model is presented, in which the pressure power spectral density (PSD), mass of the structure or eigenvalues of the structure is used as an objective function or constraint function. The thickness of the structure is used as a design variable. Based on acoustic radiation sensitivity analysis and structural sensitivity analysis, the design optimization model is solved with sequential linear programming. Numerical examples of sensitivity analysis and acoustic design optimization are given to demonstrate the effectiveness of the proposed method. © 2010 Institute of Noise Control Engineering.

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New generation software of structural analysis and design optimization--JIFEX

Cited by 12 publications

References 4 publications

Optimal placement of piezoelectric active bars in vibration control by topological optimization

Optimal placement of piezoelectric active bars in vibration control by topological optimization

Seismic response of a mid-story-isolated structure considering soil–Structure interaction in sloping ground under three-dimensional earthquakes

Design optimization of acoustic radiation from structures under random excitation

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