某车辆动力总成异常振动分析与改进

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (10) : 64-67.

论文

某车辆动力总成异常振动分析与改进

孟浩东1, 李舜酩1, 吕国华2, 徐毅2

作者信息 +

Analysis and Improvement on Abnormal Vibration for Power Assembly of Vehicle

Meng Hao-dong1, Li Shun-ming1, L Guo-hua2, Xu Yi2

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文章历史 +

摘要

针对某SUV车柴油机动力总成产生异常振动导致操纵手柄剧烈振动这一实际问题，将振动试验测试与有限元仿真分析结合起来研究动力总成的振动动态特性。通过整车道路试验及转鼓试验，发现柴油机工作转速的二阶激励激起了动力总成系统共振，通过采用有限元方法建立了一种柴油机动力总成振动分析模型，计算分析了此动力总成的振动固有频率和固有振型，找到了导致动力总成弯曲刚度变差的原因—飞轮壳结构刚度不足。在验证了有限元仿真模型计算合理性基础上，通过改进设计飞轮壳结构，提高了动力总成的固有频率，使其避开了共振频率区间，最终消除了操纵手柄的异常振动。该试验与仿真分析方法对解决同类工程问题具有参考指导和应用价值。

Abstract

In the light of an abnormal vibration problem occurred in the Sports Utility Vehicle’s power assembly of diesel engine which resulted in acute vibration of control handle, a study of the dynamic characteristics of power assembly’s vibration which took vibration test and finite element simulation analysis together was carried out. The power assembly system resonance was caused under the excitation of the 2nd order excitation frequency of the diesel engine’s working rotation by vehicle road test and chassis dynamometer test, a kind of finite element model of vibration analysis for the power assembly of diesel engine was set up by means of adopting finite element method, its natural frequencies and modal shapes of the power assembly’s vibration were calculated. It was found that the low stiffness of flywheel shell resulted in the low bending stiffness of the power assembly. On the basis of validating the rational finite element results of simulation model, the inherent frequency of power assembly was improved by the way of improving on the flywheel shell’s structure which was away from resonance frequency range, the abnormal vibration of control handle was finally removed. The test and simulation analysis methods mentioned in this paper which solve the similar engineering problem are advisable to the reference guidance and engineering application.

导出引用

孟浩东;李舜酩;吕国华;徐毅. 某车辆动力总成异常振动分析与改进[J]. 振动与冲击, 2012, 31(10): 64-67

Meng Hao-dong; Li Shun-ming; L Guo-hua; Xu Yi. Analysis and Improvement on Abnormal Vibration for Power Assembly of Vehicle[J]. Journal of Vibration and Shock, 2012, 31(10): 64-67