液-固耦合对矩形水池池壁反应谱的影响

Effect of Liquid-Structure Coupling on Rectangular Pool Response Spectrum

为了给水池中安放的与核安全有关的仪器设备提供抗震设计依据,针对与核安全有关的矩形水池,以无粘、无旋和不可压缩理想液体为研究对象,建立液-固耦合模型,研究池壁上反应谱的变化规律。研究表明考虑液-固耦合后,池壁反应谱在法向方向上有了比较显著的放大,离池壁相交处越远,这种放大作用越明显,有必要按水池壁的切向方向和法向方向给出反应谱;水池池壁相交部位反应谱放大不明显,应尽量将仪表设备安放于水池角点部位。

In order to provide a seismic design foundation to the Equipment and Instrument installed in the pool which are related to nuclear safety, in connection with the rectangular pool related to nuclear safety, study the change regulation of the response spectrum on the pool wall according to a liquid-structure coupling analysis between the inviscid, irrotational and incompressible ideal fluid and pool wall. The results show that, when considering the liquid-structure coupling, the response spectrum of the pool has a significant enlargement in the normal direction, and the farther away from the intersection of the wall, the more obvious the magnification is. It is necessary that the response spectrum be given in the tangential direction and the normal direction of the pool wall, the response spectrum amplification at the intersection site of the pool wall is not obvious, the instrumentation should be placed as close as possible to the corner parts of the pool.