冲击载荷识别的瞬态统计能量分析方法

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (14) : 46-51.

论文

冲击载荷识别的瞬态统计能量分析方法

毛伯永，谢石林，张希农

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Identification of Impact Load Based on Transient Statistical Energy Analysis Theory

Mao Boyong, Xie Shilin, Zhang Xinong

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摘要

提出了一种基于瞬态统计能量分析理论的冲击载荷识别新方法。利用该方法，首先由系统能量平衡方程确定冲击载荷的作用位置及相应的输入能量，在常值假设条件下根据识别的输入能量反演得到冲击载荷的幅值谱，在此基础上，对于给定的冲击载荷时域波形形式，提出一种参数拟合方法用于最终重建冲击载荷的时间历程。通过一个两板耦合结构系统的冲击载荷识别对识别方法进行了实验验证研究。结果表明冲击载荷识别的瞬态统计能量分析法能够准确地识别冲击载荷的作用位置和输入能量，在冲击波形已知的假设条件下可以较为准确地重建冲击载荷的时间历程，从而为实际工程中的冲击载荷识别提供了一条可行途径。

Abstract

A new identification method of impact loads based on transient statistical energy analysis theory is proposed in the paper. With the approach, the location and the input energy of impact load can be firstly identified from the energy balance equation of system. The amplitude spectrum of impact load is then derived from input energy of impact load under the assumption of the constant value on itself within each analytical frequency band. A parametric fitting scheme is also developed to reconstruct the time history of impact load for the given waveform of load in time domain. The approach is validated through impact load identification experiments of a two-plate coupling structural system. The results show that the location and input energy of impact load can be identified accurately with the presented identification method. Furthermore, the computed time history of impact load obtained from fitting scheme has a good agreement with the measured one when the waveform of load in time domain is given beforehand. The present approach provides an effective and feasible way for impact load identification of engineering structures.

导出引用

毛伯永;谢石林&#;张希农. 冲击载荷识别的瞬态统计能量分析方法[J]. 振动与冲击, 2013, 32(14): 46-51

Mao Boyong;Xie Shilin;Zhang Xinong. Identification of Impact Load Based on Transient Statistical Energy Analysis Theory[J]. Journal of Vibration and Shock, 2013, 32(14): 46-51