基于拟静态初值的载荷识别数值修正算法

徐 菁,张 方,姜金辉,浦玉学,蒋 祺

振动与冲击 ›› 2016, Vol. 35 ›› Issue (2) : 39-44.

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (2) : 39-44.
论文

基于拟静态初值的载荷识别数值修正算法

  • 徐  菁,张  方,姜金辉,浦玉学,蒋  祺
作者信息 +

Numerical correcting algorithm of load identification based on quasi-static initial value

  •  XU Jing,ZHANG Fang,JIANG Jin-hui,PU Yu-xue,JIANG Qi
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文章历史 +

摘要

推导拟静态法获得载荷初值及稳定不发散计算结果,分析获得初值不准确原因,推导获得新的载荷识别方法。该方法基于数值原理,利用步步修正达到减少累积误差效果,可较大程度提高计算稳定性,并将数值迭代修正方法用于有限元模型载荷识别。结果表明,该方法能较准确识别出工程中常见的多种载荷,并具有一定抗噪能力。

Abstract

This paper first derives a quasi-static method to obtain the initial value of load, which is a simple and quick algorithm to get stable and convergent results. This paper analyzes why the initial value of the algorithm is not accurate, and deduces a new load identification algorithm. This method is based on the principle of numerical algorithm and uses the idea of step-by-step correction, which can reduce the effect of cumulative error and greatly improve the stability of calculation. This numerical iteration method is applied to load identification of finite element model. The results of simulation and experiment show that this method can accurately identify the common variety of load in engineering, and it has a certain ability to resist noise.

关键词

载荷识别 / 时域 / 拟静态法 / 数值修正

Key words

load identification / time domain / quasi-static method / numerical correction

引用本文

导出引用
徐 菁,张 方,姜金辉,浦玉学,蒋 祺. 基于拟静态初值的载荷识别数值修正算法[J]. 振动与冲击, 2016, 35(2): 39-44
XU Jing,ZHANG Fang,JIANG Jin-hui,PU Yu-xue,JIANG Qi. Numerical correcting algorithm of load identification based on quasi-static initial value[J]. Journal of Vibration and Shock, 2016, 35(2): 39-44

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