核反应堆贮液容器的抗震分析

Seismic Analysis of Liquid Storage Container in Nuclear Reactors

贮液容器的抗震计算一直是核设备抗震分析中的一个难点，这主要是由于容器内的液体在地震动的作用下会产生很大的动液压力，这种动液压力可能成为容器应力的主要来源。对于这类结构-液体耦合振动问题，以往人们是通过理论分析得到一些简化计算的结果，但往往不能满足设计上的需要；近年来发展成熟的有限元技术对于结构应力计算十分有效，但对于流固耦合问题，目前尚未成熟。本文介绍了一种针对结构-液体耦合振动问题的实用算法，它是将动液压力的理论分析与结构的有限元数值计算结合起来，为贮液容器的抗震计算提供了一条新的思路。

Seismic analysis of liquid storage containers is always difficult in the seismic design of nuclear reactor equipment. The main reason is that the liquid can generate significant seismic loads under earthquake. These dynamic liquid loads usually form the main source of the stresses in the container. For this kind of structure-fluid coupling problem, some simplified theoretical methods were usually used previously. But these methods can not satisfy the requirements of engineering design. This paper introduces a method suitable for engineering mechanical analysis. Combining theoretical analysis of the dynamic liquid loads and finite element analysis of the structure together, this method can give practical solutions in the seismic design of liquid storage containers.