CNP1000安全壳1∶10模型的模态分析

Modal analysis for a 1∶10 model of CNP1000 reactor containment

对CNP1000安全壳1：10模型进行了在力锤激励下的试验模态分析，并采用ANSYS软件对结构进行有限元计算模态分析，实测结果与有限元计算结果吻合较好。结构前3阶振型分别为两个正交水平方向的平动和扭转振动，4-9阶振型为筒体局部振动。研究结果有助于认识安全壳结构的动力特性。

The hammer impulse-stimulating measurement of a CNP1000 Reactor containment 1：10 model is used to determine the model＇ s dynamic characteristics. The finite element analysis model of the structure is built by ANSYS. By contrast, the results are closed to each other. The first two mode shapes of the structure are vibration along two perpendicularly axes, the third is the torsional mode shape and the fourthly to ninthly are partial vibration of the barrel. The results contribute to realize the reactor containment＇ s dynamic characteristics.