金属结构弹性波波动特性仿真分析方法

Simulation analysis method for fluctuation characteristics of metal structures based on elastic wave

结构健康监测方法具有对小尺寸损伤快速响应、实现大面积范围监测等优点,且能够实时监测飞行器重要结构的健康状况,从而保障飞行器安全飞行,减少维护成本。针对民用飞行器金属结构,研究其基于主动弹性波的结构健康监测方法。首先,提出了一种金属结构弹性波波动特性仿真分析方法,详细阐述了仿真关键步骤参数设置。然后,对采集的实验信号数据,从信号波形以及波传播群速度两个方面进行了对比。结果表明,仿真信号与实验信号数据最大误差在5%左右,从而验证了提出的仿真方法的有效性和正确性。该仿真方法可以用于后续的飞行器金属结构波动特性及其损伤影响研究。

The structural health monitoring method has the advantages of quick response to small-scale damage,achieving large-scale monitoring,which can monitor the health status of important aircraft structures in real time online,so as to ensure the safe flight of aircraft and reduce maintenance costs.A structural health monitoring method based active elastic wave for metal structures of civil aircraft was studied.This paper first proposes a simulation method of metal structure elastic wave fluctuation characteristic,and describes the key steps of simulation parameter setting in detail.Then,through collecting experimental signal data,the signal waveform and the wave propagation group velocity were compared.The results show that the maximum error between the simulation signal data and the experimental signal data is about 5%,which verifies the validity and correctness of the proposed simulation method.The simulation method can be used to study the fluctuation characteristics and damage effects of the metal structure of aircraft.