基于传递矩阵理论的隔膜泵振动噪声预测方法研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (18) : 329-336.

论文

基于传递矩阵理论的隔膜泵振动噪声预测方法研究

陈斯宇1，赵凯2，吴海军1

作者信息 +

Vibration and noise prediction method for a diaphragm pump based on the transfer matrix theory

CHEN Siyu1, ZHAO Kai2, WU Haijun1

Author information +

文章历史 +

摘要

隔膜泵是家用净水器的动力装置，其振动噪声会对用户的使用体验产生负面影响。构建有效的隔膜泵振动噪声预测方法，可以在泵的设计阶段实现噪声的准确预测，从而降低设计成本。根据水泵的工作原理，本文针对一种隔膜泵的轴系，构建了基于传递矩阵理论的横向振动动力学模型，建立了轴系固有频率的计算方法。引入扩展传递矩阵，建立水泵外激励等效模型，发展了典型工况下轴系对水泵外壳作用力的频响分析方法。将作用力作为输入，利用有限元软件计算泵壳的辐射声场。开展泵体辐射噪声的实验测试，结果显示泵体的平均声压级与仿真结果具有较好的一致性，说明了本文提出的等效建模方法的准确性，对隔膜泵的低噪声优化设计与分析具有指导意义。

Abstract

Diaphragm pump is power device of the household water purifier, and its vibration and noise have a negative impact on the users. Constructing an effective vibration and noise prediction method for diaphragm pumps can achieve accurate prediction of noise during the design stage of the pump, thereby reducing design costs. According to the working principle of the pump, this paper constructs a dynamic model of transverse vibration based on transfer matrix theory for the shafting of the diaphragm pump, and establishes a calculation method for the natural frequency of the shafting. With introducing the extended transfer matrix and establishing an equivalent model of the external excitation of the pump, a frequency response analysis method for the force exerted by the shafting on the pump housing under typical working conditions is developed. Taking the force as input, finite element software is used to calculate the radiated sound field of the pump housing. An experimental test of the radiated noise of the pump housing is carried out. The result shows that the average sound pressure level of the pump housing is in good consistency with the simulation results, which demonstrates the accuracy of the equivalent modeling method proposed in the paper and has guiding significance for the low noise optimization design and analysis of diaphragm pumps.

导出引用

陈斯宇1, 赵凯2, 吴海军1. 基于传递矩阵理论的隔膜泵振动噪声预测方法研究[J]. 振动与冲击, 2024, 43(18): 329-336

CHEN Siyu1, ZHAO Kai2, WU Haijun1. Vibration and noise prediction method for a diaphragm pump based on the transfer matrix theory[J]. Journal of Vibration and Shock, 2024, 43(18): 329-336

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