简支梁振动实验台载荷识别的测试

Test for the Load Identification of Simple Beam Vibration Test Bench

简支梁可根据受力特点分别简化为单自由度系统和连续系统。本文首先由两种物理模型的振动方程推导出简谐激励力的识别公式,然后通过数据采集系统以及信号分析软件,得到系统的振动频率并应用识别公式,成功的对未知激励力进行了识别。

Simple beam can be simplified into single-degree-of-freedom systems and continuous systems. In the first place, this paper deduces the formula for identification of harmonic excitation from the vibration equations of two physical models. Next, with the help of data-collecting system and signal analysis software, the system＇s frequency of vibration is worked out and applied to the identification formula so that the unknown exciting force can be identified in the end.