首页> 外文会议>Third International Conference on Coupled Instabilities in Metal Structures CIMS'2000, 3rd, Sep 21-23, 2000, Lisbon-Portugal >A VARIATIONAL APPROACH FOR DESIGN SENSITIVITY ANALYSIS OF NONLINEAR STRUCTURAL STABILITY
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A VARIATIONAL APPROACH FOR DESIGN SENSITIVITY ANALYSIS OF NONLINEAR STRUCTURAL STABILITY

机译:非线性结构稳定性设计灵敏度分析的变分方法

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摘要

By using a continuum formulation, a variational approach is developed in order to perform the design sensitivity analysis of the nonlinear structural stability problem. The formulation is addressed in a unified manner by considering the general stability problem of nonconservative structures. Conservative structures are considered as particular cases of such problem. The variational principle of dynamics and the total lagrangean description of the motion, as well as the concepts of adjacent and adjoint displacements, are combined to formulate the stability equations and define critical and bifurcation points. By another hand, the design sensitivity equations are derived with basis on the concepts of adjoint structure and design control or reference volume.
机译:通过使用连续体公式,开发了一种变分方法来执行非线性结构稳定性问题的设计敏感性分析。通过考虑非保守结构的一般稳定性问题,以统一的方式解决配方问题。保守结构被认为是此类问题的特殊情况。结合了动力学的变分原理和运动的总拉格朗日描述以及相邻和伴随位移的概念,以建立稳定性方程式并定义临界点和分叉点。另一方面,设计灵敏度方程式是基于伴随结构和设计控制或参考体积的概念得出的。

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