两端铰支输流管道固有频率的研究

Research on natural frequency of pinned-pinned pipe conveying fluid

利用复模态分析方法和Galerk in方法研究了两端铰支输流管横向振动对其固有频率的影响。通过数值方法绘出系统的前两阶固有频率随流体速度的变化情况。利用数值算例分析了复模态分析方法、二阶Galerk in截断和四阶Galerk in截断方法对固有频率的影响。

The transverse vibrations of is investigated by the complex mode method and Galerkin method. The numerical examples show the first two natural frequencies affected by the fluid flowing speed. The influence of the complex mode method, two order Galerkin method and four order Galerkin method to the natural frequencies are also simulated.