某商用车排气系统车身悬挂点强度分析及优化设计  

Strength Analysis and Optimization Design of Exhaust System Body Suspension Points in a Commercial Vehicle

作　　者：武文星 宁善平 WU Wenxing;NING Shanping(Guangdong Communication Polytechnic,Guangzhou 510650,Guangdong,China)

机构地区：[1]广东交通职业技术学院,广东广州510650

出　　处：《广东交通职业技术学院学报》2024年第3期68-73,共6页Journal of Guangdong Communication Polytechnic

摘　　要：排气系统车身悬架点强度不足严重影响排气系统的运行状态,从而影响整车的行驶稳定性和舒适性。本研究将有限元分析与有针对性的强度改进相结合,用以解决某品牌商用车排气系统车身悬架点强度不足的问题。首先建立排气系统有限元分析模型,基于12种工况进行有限元仿真计算,准确评估系统在各种工况下的性能。随后进行受力分析和计算,制定优化解决方案,改善系统悬架的薄弱环节。最后通过仿真实验和实际应力测试验证改进的有限元模型。实验结果表明,优化后的排气系统的车身悬挂点强度显著提升,所受最大应力由556.8 MPa降为268.4 MPa。Insufficient strength in the body suspension points of the exhaust system significantly affects its operational status,thereby impacting the driving stability and comfort of the entire vehicle.This study employed a novel approach that combines finite element analysis with targeted strength improvements to address the issue of insufficient strength in the body suspension points of the exhaust system for a specific brand of commercial vehicles.By first establishing a finite element analysis model for the exhaust system and conducting finite element simulation calculations based on 12 operating conditions,the system's performance under various scenarios was accurately evaluated.Subsequent force analysis and calculations enabled us to develop optimization solutions aimed at improving the weak areas in the suspension system.Finally,through simulation experiments and actual stress testing,the improved finite element model was rigorously validated.The experimental results demonstrate a significant enhancement in the strength of the body suspension points of the exhaust system after implementing the optimization measures.The maximum stress was reduced from 556.8 MPa to 268.4 MPa.

关 键 词：排气系统 有限元 强度 受力分析 应力 

分 类 号：U464.134.4[机械工程—车辆工程]