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Structural Reliability Sensitivities under Nonstationary Random Vibrations

机译：非平稳随机振动下的结构可靠性敏感性

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摘要

Response sensitivity evaluation is an important element in reliability evaluation and design optimization of structural systems. It has been widely studied under static and dynamic forcing conditions with deterministic input data. In this paper, structural response and reliability sensitivities are determined by means of the time domain covariance analysis in both classically and nonclassically damped linear structural systems. A time integration scheme is proposed for covariance sensitivity. A modulated, filtered, white noise input process is adopted to model the stochastic nonstationary loads. The method allows for the evaluation of sensitivity statistics of different quantities of dynamic response with respect to structural parameters. Finally, numerical examples are presented regarding a multistorey shear frame building.
机译：响应灵敏度评估是结构系统可靠性评估和设计优化中的重要元素。它已在具有确定性输入数据的静态和动态强制条件下进行了广泛研究。在本文中，通过时域协方差分析来确定经典和非经典阻尼线性结构系统中的结构响应和可靠性敏感性。针对协方差敏感性，提出了一种时间积分方案。采用经过调制，滤波的白噪声输入过程来对随机非平稳负载进行建模。该方法允许评估相对于结构参数的不同动态响应量的灵敏度统计。最后，给出了有关多层剪切框架建筑的数值示例。

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  • 来源
    《Mathematical Problems in Engineering》 |2013年第3期|426361.1-426361.21|共21页
  • 作者

    Rita Greco; Francesco Trentadue;

  • 作者单位

    Department of Civil, Environmental, Territory, Building and Chemical Engineering,Technical University of Bari, Via Orabona, 4-70125 Bari, Italy;

    Department of Civil Engineering and Architectural Science, Technical University of Bari, Via Orabona,10-70125 Bari, Italy;

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