输流直管的动态特性研究在理论上和工程应用中都十分引人注目,Paidoussis和Chen等对不同支撑条件下的弹性输流直管进行了深入的理论研究,对系统的稳定性及动态特性做了详细的描述。在一般金属管路系统中,流速远低于一阶临界失稳流速,流体与管道结构之间存在着弱耦合,由于流体流动产生的耗散力效应,系统不再具有经典实振型。理论和 The research on the dynamic characteristics of the straight pipe is very noticeable in both theory and engineering application. Paidoussis and Chen have conducted in-depth theoretical research on the elastic straight pipe under different support conditions, and the stability and dynamics of the system. The characteristics are described in detail. In the general metal pipeline system, the flow velocity is much lower than the first-order critical instability flow rate, and there is a weak coupling between the fluid and the pipeline structure. Due to the dissipation force effect caused by the fluid flow, the system no longer has a classical real vibration type. Theory and