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以某大型水电站厂房为研究对象,采用模型水轮机流道实测脉动压力数据,对厂房整体结构进行有限元仿真频响分析,基于功率流理论、功率流有限元方法及APDL语言编程,实现厂房风罩、楼板、立柱及廊道结构功率流的计算。结果表明:蜗壳脉动能量的传导以剪切波效应为主,以竖向和顺河向的动力响应为表现方式;机墩及风罩结构是功率流传导的主要路径,其结构形式简单,耗能效果不显著;厚墙、厚板结构能较好吸收传导的能量,限制厂房上部结构动力响应幅值。本文研究成果可为厂房低频脉动压力传导测试及分析提供理论依据及参考。
Taking a large hydropower plant as the research object, the pulsating pressure data of the runner of the model turbine was used to analyze the whole structure of the plant by the finite element simulation. Based on the theory of power flow, finite element method of power flow and APDL language programming, , Floor, column and corridor structure power flow calculation. The results show that the transmission of pulsating energy of the volute is mainly shear wave, and the dynamic response is vertical and transversal. The pier and hood structure is the main path of power flow, and its structure is simple and consumes The effect is not significant; thick wall, thick plate structure can better absorb the conduction energy, limit the dynamic response amplitude of the superstructure of the plant. The research results in this paper can provide theoretical basis and references for the test and analysis of low frequency pulsating pressure transmission in the plant.