基于压电陶瓷的销轴连接受力状态监测

销轴连接作为工程中一种常用的连接构件，实时监测其在荷载下的健康状态，对结构的整体稳定性至关重要。该文研究了一种基于压电理论的销轴连接受力状态的实时监测方法，并对其展开了理论和实验研究。同时基于小波包理论分析接收信号的能量，从而识别销轴连接的受力状态。研究结果表明，接收信号的能量与销轴连接的受力状态相关，随着接触面的法向压力增大，接收信号的能量增大，但当法向压力增大到一定值后，接收信号能量达到饱和。因此，该文提出的基于压电理论的销轴连接受力状态监测方法在一定的荷载范围内具有良好的可行性和应用意义。

Monitoring Force State of Pin Shaft Connection Based onPiezoelectric Ceramics

The pin shaft connection is a commonly used connection component in engineering, the real-time monitoring of its health state under load is vital to the overall stability of the structure. In this paper, a real-time monitoring method for the force state of the pin-shaft connection based on piezoelectric theory is studied by theory and experiment. To identify the force state of pin-shaft connection, the energy of received signal is analyzed based on the wavelet packet theory. The results show that the energy of the received signal is related to the force state of the pin-shaft connection. With the increase of the normal pressure on the contact surface, the energy of the received signal increases, but when the normal pressure increases to a certain value, the energy of the received signal reaches saturation. Therefore, the monitoring method for pin-shaft connection based on piezoelectric theory proposed in this paper has good feasibility and application significance in a certain load range.