结构模态参数测试的传感器优化布置研究

A STUDY ON OPTIMAL SENSOR PLACEMENT FOR STRUCTURAL MODAL PARAMETERS TESTING

结构模态参数的测试是进一步进行结构动力响应计算、结构损伤检测等的重要基础.在线结构的模态参数的测试通常采用环境激励来进行.在采用环境激励的结构动力特性测试中,传感器的布置直接影响测试的结果.采用有限带宽白噪声激励模拟环境激励研究传感器的布置对结构模态参数测试的影响.实验结果表明传感器的不同布置影响结构动力参数的测试结果,优化布置传感器可以提高结构模态参数的测试精度.

The testing of structural modal parameters is an important basis of dynamic response analysis and structural damage detection. Modal parameters of real structure are usually tested by ambient excitation. The sensor placement affects testing accuracy during this detection. The affection of sensor placement on structural parameters testing are studied by finite bandwidth white noise vibration experiment. The experimental result shows that optimal sensor placement can improve testing accuracy of structural modal parameters.