弱约束充液管道FSI频响分析

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 IN INTERNAL FLOWS

Frequency response analysis of the liquid-filled pipeline is an important way to obtain the dynamic behavior of piping systems subjected to internal/external excitations. This study applies Laplace transform to hyperbolic partial differential equations which describes the axial motion taking into account Fluid Structure Interaction (FSI). An effective and convenient method to tackle frequency analysis and to pick up resonance frequencies of the system was developed, four wave modes in the frequency domain being used in combination of solution. The efficiency of this method is well proved with the examples.

化工管路系统水击振动特性频域研究

运用分布参数法在频域内研究刚性约束化工管路的水击响应。在频域内建立阀后刚性管道系统的水击振动动力学传输方程;推导出管路系统的传输压力比幅值特征方程,获得不同边界条件下管路的水击振动响应规律;并从谐振管长、激振源阻抗和负载阻抗方面对管路的谐振与管路振动响应进行了分析,当负载阻抗和管路特征阻抗匹配时,其压力比幅值最小。