传感器优化布设在水电站厂房振动特性研究中应用

目前水电站厂房的振动问题日益突出．根据当前水电站厂房振动研究和振动载荷特性识别的需要，总结了土木工程中几种常用的传感嚣优化布设准则，选择了BDA（backward deletion algorithm）方法；基于ANSYS—APDL二次开发技术，编写了适于水电站建筑物应用的Fortran程序；将传感嚣优化理论与方法应用干红石水电站厂房振动分析，建立了有限元数值模型及振动模态分析方法，对传感器布置进行了优化．发现选取前两阶振型参与优化布设已可满足要求，可为厂房的振动测量和动态识别提供较为可靠的数据．

Application of optimal sensor placement algorithms for vibration characteristics analysis of power house in hydropower station

The vibration of the power house in hydropower station becomes a much more serious problem.In order to satisfy the need of analyzing the cause of machine vibration and oscillating load in hydropower station,several optimal sensor placement criterions are summed up and the BDA(backward deletion algorithm) is introduced into the practical application.Based on the ANSYS-APDL a Fortran program is written for the special structure problem in hydropower station.The power house of Hongshi Hydropower Station is taken as an real example and the FEM model is established for the vibration identification and the optimal design of sensor placement.It is found that taking into consideration only the first two vibration modes of the power house is enough for the dynamic analysis.The method proposed here can provide more reliable information for the dynamic characteristics analysis in the hydropower station.