某型燃气轮机一体化叶盘转子系统动力学特性

以某型燃气轮机转子系统为研究对象，建立了叶盘转子一体化模型，通过子结构法与整体法所求静频结果的比较，验证了子结构法分析计算过程的准确性和高效性.应用子结构法，考虑离心应力的作用，求解了一体化叶盘转子系统在工作转速下的动频，并与传递矩阵法的计算结果进行了比较，分析了叶片对整体模态的影响.建立了不同展弦比下叶盘系统的模型，探讨了在定宽度和定长度情况下，不同叶片展弦比对系统模态的影响变化规律.研究结果表明:考虑叶片对一体化叶盘转子系统离心刚化的作用，使得研究结果更加接近工程实际，叶片展弦比对系统的振动特性存在较大的影响.研究为某型燃气轮机转子的动力学设计提供了理论依据.

Dynamics of Integrated Blade Disc Rotor System of the Gas Turbine

An integrated blade disc rotor model was established based on a gas turbine rotor system. With the overall and substructure methods， the static frequency was solved. The comparison of two methods shows that the accuracy and efficiency of the substructure method is high. Considering the role of centrifugal stress， dynamic frequency of the integrated blade disc rotor system at working speed was solved with the substructure method. Meanwhile， the influence of the blade on the overall modality was analyzed. Finite element models of the blade disc system were established under different aspect ratios， and the influence of aspect ratio on blade disc system model was explored in fixed blade width and fixed blade length， respectively. Results indicate that the study is closer to practical engineering when considering the blade centrifugal stiffening effect on the blade disc rotor system. The aspect ratio has a great influence on the system vibration characteristics. This research provides theoretical basis for the dynamics design of gas turbine rotor.