Optimization and Improvement of the Dynamic Parameter Test with Dynamic Machine Model Foundation at a Nuclear Power Plant
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摘要: 核电厂汽轮机厂房多位于坚硬的岩石地基上，模型基础动力参数测试共振频率达到100 Hz以上，土质地基上常用的测试方法由于其机械式激振器扰频上限低的缺陷，对核电厂岩石地基适用性很差。在激振器、垫层、激振器与模型基础的连接方式、测试方式等方面进行研究，优化、改进了测试设备和测试方法，开发了全自动常扰力测试控制系统，使之更适合核电厂岩石地基，测试结果更准确地代表岩石地基的动力特性。Abstract: The steam turbine buildings of nuclear power plants are mostly located on hard rock subgrade, and the resonance frequency of the dynamic parameter test with model foundation reaches more than 100 Hz, Due to the defect of the low upper limit of the excitation frequency of mechanical exciters, the test method commonly used on soil subgrade is no longer applicable to the rock subgrade of nuclear power plants. Research has been conducted on the connection and testing methods between the exciter, cushion layer, exciter and model foundation. The testing equipment and methods have been optimized and improved, and a fully automatic constant disturbance force testing control system has been developed to make it more suitable for rock foundations in nuclear power plants. The test results could represent the dynamic characteristics of rock foundations accurately.
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