Structure health monitoring based on diagnostic Lamb waves has been found to be one of the most promising techniques recently. This paper has a brief review of the new developments on this method including the basic ... Structure health monitoring based on diagnostic Lamb waves has been found to be one of the most promising techniques recently. This paper has a brief review of the new developments on this method including the basic novel of the method, fundamentals and mathematics of Lamb wave propagation, narrowband and wideband Lamb wave excitation methods, optimization of excitation factors and diagnostic Lamb wave interpretation methods.展开更多
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,...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。展开更多
基金The authors acknowledge the financial supports from the National Natural Science Foundation of China under grant No.90305005,50135030
文摘 Structure health monitoring based on diagnostic Lamb waves has been found to be one of the most promising techniques recently. This paper has a brief review of the new developments on this method including the basic novel of the method, fundamentals and mathematics of Lamb wave propagation, narrowband and wideband Lamb wave excitation methods, optimization of excitation factors and diagnostic Lamb wave interpretation methods.
文摘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。
