基于CFD的挖掘机消声器结构优化研究

结合插入损失、压力损失和结构尺寸等影响抗性消声器产品质量的因素，利用三维计算流体力学仿真方法分析了某型号挖掘机消声器内部的压强分布，研究了造成压力损失过大的原因，对消声器的压力损失进行了预测，提出根据整机设计要求对消声器进行结构优化的设计流程，应用到实际抗性消声器的性能改进实践中。利用试验数据和计算机仿真分析，证明了改进后的消声器在压力损失、插入损失和在整机装配中均能满足该挖掘机的要求。

Muffler Structure Optimization Research of Digging Machine Based on CFD

A resistance muffler of digging machine was studied to reduce the pressure loss and optimize the structures according to the three main performances of muffler including insert loss, pressure loss and physical dimensions. Computational Fluid Dynamics (CFD) method with 3-Dimension models was used to analyze the pressure distribution in the muffler, and to explore the reasons of the unexpected pressure loss. The pressure loss of the muffler was predicted with this method for the structure modification. The optimization procedure of muffler design was brought forward with the performances improvement of a practical resistance muffler. The pressure loss, the insert loss and the structures of the muffler are verified to meet the demands of the digging machine after the corresponding optimization with the data of experiments and the simulations.