弱约束充液管道FSI频响分析

FREQUENCY RESPONSE ANALYSIS OF FSI IN LIQUID-FILLED PIPELINES

流体～结构相互作用下充液管道的频响分析是了解管道水锤振荡特性、确保设计经济合理、运行安全可靠的重要途径．本文给出了一种在多种流回耦合情况下对管道进行频响分析的新方法：基于Ｌｅｐｌａｃｅ变换的特征向量迭加法，使用该法可极为方便地求出管道在任一激源作用下的频域解析解。文中仅限于讨论轴向运动情况。

Frequency response analysis of pipework is an important way to understand the dynamic behavior of vibrating systems. In the frequency domain there exist four complex waves in the liquid-filled pipe, two Young's modes and two Lamb's modes. Taking into account the full fluid-structure interactions, an analysis method on the basis of the Laplace transform and wave mode superposition technique is presented in the paper. The effectiveness of thes method has been verified with the results published in the field.