中文摘要：

对液压电机叶片泵内部的激振源和振动传递路径进行分析，通过对其结构进行适当假设和等效，建立液压电机叶片泵的虚拟样机模型，采用有限元法对液压电机叶片泵进行模态分析，获得其固有频率及对应振型．结果表明：动压支撑结构使得液压电机叶片泵的固有频率得到一定提高，有利于液压电机叶片泵的减振降噪；电机转子是产生振动的主要部件，低阶模态下电机转子与叶片泵可能存在共振现象．仿真结果为液压电机叶片泵的结构设计与减振降噪提供理论参考．

英文摘要：

The excitation source and vibration transfer path in hydraulic motor-vane pump were analyzed, a virtual prototype model was built based on appropriate structure assumption and equivalence, the modal analysis of hydraulic motor-vane pump was carried out with finite element method, and, finally, the natu- ral frequencies and vibration modes were obtained. The result showed that the natural frequency of hy- draulic motor-vane pump would increase to some extent due to hydrodynamic supporting structure, being in favor of reducing the vibration and noise. Motor rotor was the key origin of vibration, there might be resonance between motor rotor and vane pump in lower-order mode. The simulation result would provide a reference for structural design and reduction of vibration and noise of hydraulic motor-vane pump.