核电桥式起重机桥架结构地震分析方法研究

摘要

核电桥式起重机是核电厂常用起重设备,抗震性能要求高.目前核电桥式起重机的抗震分析大多采用反应谱分析.在遇强震状况下,由于反应谱分析只适用于线性结构,分析结果不精确,因此必须对结构进行时程分析.选取Kobe地震波,使用2种不同分析方法,通过AN-SYS Workbench模块对地震情况下桥式起重机桥架结构的应力和变形结果进行求解.通过比较得到,在强震分析中,反应谱求解方法结果误差增大,但避免了繁琐计算,节省了时间.所以在地震载荷小或求解精度要求低的情况下可以选用反应谱分析替代时程分析进行求解.%Bridge crane is commonly used in nuclear power plant,and it needs very high anti seismic performance. At present,the response spectrum analysis is commonly used in the antiseimic performance analysis for the bridge crame.Under severe earthquake conditions,this analysis method is only applied to the linear structure,its results are not accurate.So the time history analysis meth-od is used to analyse the structures.In this paper, Kobe seismic wave is selected and two different analysis methods are used to solve the stress and deformation of its bridge structure under the seismic condition by means of ANSYS Workbench module.By com-parison,in violent earthquake analysis,the result error obtained by using the response spectrum method is bigger.but its calculation is easy,thus saving a lot of time. So it is only used to small earthquake or low precision analysis.