摘要
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器优化布设准则,选择了BDA(backw ardde letion a lgorithm)方法;基于AN SY S-APDL二次开发技术,编写了适于水电站建筑物应用的Fortran程序;将传感器优化理论与方法应用于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.
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.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2006年第2期262-266,共5页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目(50279003)
