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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,采用变厚度的设备基础设计,使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。最后通过时程分析,对稳态分析得出的最大响应频率和设备长期工作频率进行了时程分析,结果表明动力响应均满足GB50040─1996《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目的和试验要求。
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 equipment load, the equipment design of variable thickness is adopted to make the foundation center of gravity as close as possible to the upper load center of gravity while avoiding the natural frequencies of the main plant and equipment. Finally, through the time history analysis, the maximum response frequency and the long-term operating frequency of the steady-state analysis are analyzed. The results show that the dynamic response meets the vibration control requirements of GB50040─1996 “Basic Design Code for Power Machinery”. The basic design Achieve the damping purposes and test requirements.