矿用自卸车排气消声器性能仿真分析及优化

Simulation analysis and optimization of exhaust muffler for mining dump truck

介绍了消声器声学及流场仿真的理论及方法,针对某工程车辆排气噪声贡献大的特点,对其消声器进行了声场仿真,根据仿真结果对消声器进行了结构优化,通过计算流体力学(CFD)的方法对优化前后的消声器进行了流场仿真,仿真及试验结果显示,改进后消声器改善了消声性能和空气动力性能。

This article briefly introduces the theory and method of muffler acoustics and flow field simulation. According to the characteristic of the exhaust noise of engineering vehicles, the article carries out the sound field simulation on muffler. We carries out structural optimization on muffler and the fluid field simulation by the method of Computational Fluid Dynamics(CFD). The results show that the optimized muffler improves both the muffling performance and the aerodynamic performance.