航空运输集装托盘结构损伤模拟实验研究

Simulation Experiment on Air Transport Containerized Pallet Structure Damage

为提高航空运输集装托盘使用的安全性与经济性,给航空运输集装托盘结构健康监测技术研究提供一种损伤模拟方法,使用幅值和相位综合损伤因子、幅值无关损伤因子和相位无关损伤因子3种损伤因子计算方法,分别计算不同激励信号中心频率下,粘贴吸波胶、粘贴钢球、结构状态微变和噪声,以及不同面积结构真实损伤的损伤因子。实验结果表明:可以使用粘贴钢球的方式模拟航空运输集装托盘发生损伤,Lamb波的激励信号中心频率宜选择在100~120 k Hz。

In order to improve the safety and economy of air transport containerized pallet,and to provide a damage simulation method for structural health monitoring technology research of air transport containerized pallet,the paper calculates the damage factor of the sticking wave absorbing glue,sticking steel ball,structural state microevolution and noise,and real damage in different area structures at different frequency of the excitation signal with calculation methods of amplitude and phase composite damage factor,amplitude independent damage factor and phase independent damage factor. The experimental results show that sticking steel ball can simulate the damage of air transport containerized pallet,and the frequency of excitation signal center of Lamb wave should be selected at 100 ~ 120 k Hz.