以往对拉杆转子的研究多以连续整体转子对待，模型精度不高，为此，将拉杆转子非连续界面上的接触效应考虑在内，运用键合图法建立了拉杆转子扭转振动的动力学模型，并对接触面当量扭转刚度的影响因素作了相关分析。结合一实验拉杆转子对其扭转振动进行了理论计算与实测对比，分析了不同预紧力作用下拉杆转子与连续整体转子扭转振动的固有频率，并将预紧力为4000N时拉杆转子与连续转子的模态振型进行了对比。结果表明，该拉杆转子扭振模型不仅具有更高的精度，而且它通过接触面的扭转变形从本质上体现了拉杆转子与连续转子的区别，为今后对拉杆转子的进一步研究奠定了基础。

A rod fastening rotor used to be treat as a continuous integral rotor, so the model is not very precise. By considering the contact effect of discontinuous interfaces, a dynamic model of rod fastening rotor’s torsional vibration is put forward by using bond graph. The influencing factors of equivalent torsional stiffness have been analyzed. The theoretical results and the experimental results of an experimental rod fastening rotor’s torsional vibration have been contrasted. The natural frequency of rod fastening rotor and continuous integral rotor’s torsional vibration has been analyzed under different pretightening forces. The vibration mode of continuous integral rotor and rod fastening rotor whose pretightening force is 4000N have been contrasted. The contrast results show that the model of rod fastening rotor is not only more precise than continuous integral model, but also it represent the essential difference between rod fastening rotor and continuous integral rotor, it can settle the foundation of the further research on rod fastening rotor.