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采用通用有限元计算软件对超大型核电主泵试验台基础振动进行分析,清晰地显示了试验台基础在大型水泵旋转动力荷载作用下的振动时程响应。在基础设计中,根据设备荷载的布局,大胆采用了变厚度的设备基础设计,使得基础重心尽量接近上部荷载重心,同时避开主厂房和设备的自振频率。最后通过对稳态分析得出的最大响应频率和设备长期工作频率作时程分析,结果表明动力响应均满足《动力机器基础设计规范》的振动控制要求,基础设计达到了减振的目的和试验的要求。
The common finite element analysis software is used to analyze the vibration of the foundation of the super-large nuclear power main pump test bench, which clearly shows the vibration time-history response of the test bench foundation under the rotational dynamic load of the large-scale water pump. In the basic design, based on the layout of the equipment load, boldly adopted a variable thickness of the basic equipment design, making the foundation as close to the center of gravity as possible, while avoiding the natural frequency of the main plant and equipment. Finally, through the time-history analysis of the maximum response frequency and the long-term operating frequency of the equipment, the results show that the dynamic response satisfies the vibration control requirements of “Basic Design Code for Power Machinery”, and the basic design achieves the purpose and test of vibration reduction Request.