拉杆转子力学模型的研究

 提出了一种力学模型。该力学模型刻画了拉杆转子各部件之间在相互联接处的力学状态和性质。用动态子结构方法时一试验模型拉杆转子进行了理论计算,同时在实验室对模型拉杆转子的固有频率进行测试。由计算和试验的对比分析表明,这种力学模型较好地反映了拉杆转子系统的物理本质。

THE ANALYSIS OF MECHANICAL MODEL OF ROD FASTENING ROTOR

In the design of ground gas turbine, the rod fastening rotor (bolted stacks rotor) is used. The rotor system consists of disks, stubs as well as circumferentially distributed tension rods. So far in the dynamic analysis of this kind of rotor in literatures, an integral rotor model is generally adopted. Sometimes the modified stiffness coefficient approach is also used to consider the effect of contacted interface. However the natural frequencies obtained from the above model are always higher than the observed ones. It is necessary to seek a more appropriate model to simulate it.A mechanical model is developed. It is considered to describe the mechanical behaviour of the interface where the component parts of the rotor are connected with each other. By using substructure coupling method, the theoretical analysis and numerical calculation of a laboratorial model rotor have been done. The natural frequencies of the rotor were also measured in laboratory. The coincidence between both results shows that the model presented here is effective.