【摘要】 直线共轭内啮合齿轮泵作为重要的动力元件，产生的振动噪声是液压系统需要解决的关键问题之一。本文通过建立集中参数模型计算齿轮泵的主要结构噪声激振力，建立有限元模型研究其振动响应，建立声学边界元模型分析其辐射噪声和平板声压贡献量。通过试验模态分析和振动试验对齿轮泵的有限元模型进行验证，通过声源定位试验对其声学边界元模型进行验证。研究结果表明：所建立的仿真模型具有良好的精度；主频和倍频是影响齿轮泵振动噪声的主要频率；确定了齿轮泵振动噪声贡献量较大的区域，泵壳体表面振动速度最大值主要集中于后泵体位置，噪声声压值呈现从进口侧到出口侧先减小后增大的趋势。本文为齿轮泵结构优化设计提供了依据。更多还原

【Abstract】 As an important power element,the vibration noise generated by a linear conjugated internal meshing gear pump is one of the key problems to be solved in hydraulic systems. In this paper, the main structural noise excitation force of the gear pump is calculated by establishing a lumped parameter model, and its vibration response is studied by establishing a finite element model, and its radiated noise and panel sound pressure contribution are analyzed by establishing an acoustic boundary element model. The finite element model of the gear pump is verified by experimental modal analysis and vibration experiments, and the acoustic boundary element model is verified by sound source localization experiments. The results show that the established simulation model has good accuracy. The fundamental frequency and its harmonics are the main frequencies affecting the vibration noise of the gear pump. The vibration noise region of the gear pump is identified. The maximum value of vibration speed is mainly concentrated in the pump rear cover, and the noise sound pressure value shows a trend of decreasing and then increasing from the inlet side to the outlet side. This paper provides a basis for the structure optimization design of the gear pump.更多还原