基于汽车NVH提升的传动轴优化仿真分析与试验验证-汽车工程.PDFVIP

汽摇 车摇 工摇 程 2018年(第40卷)第12期 Automotive Engineering 2018(Vol.40)No.12 doi:10.19562/ j.chinasae.qcgc.2018.012.013 基基于汽车NVH提升的传动轴优化 仿真分析与实验验证* 徐劲力,潘青姑,陈端滢 (武汉理工大学机械工程学院,武汉摇 430070) [摘要]摇 Birfield球笼万向节具有等速传递、附加弯矩平稳等优点。 结合传动轴中间支承的振动对传动轴动力 性能和车内噪声的影响,提出采用将中间十字轴万向节替换为Birfield球笼万向节的设计方案。 通过ADAMS虚拟 样机对三段式十字轴万向节传动轴和Birfield球笼万向节传动轴在不同输入转速、不同主轴轴间夹角条件下进行仿 真,分析表明Birfield球笼万向节传动轴的中间支承振动加速度变化和转矩波动更趋于平稳。 分别对装有两种传动 轴的实验样车进行整车车内噪声实验对比分析,实验表明Birfield球笼万向节能有效改善车内噪声,在中低速区域 明显低于十字轴万向节传动轴车辆约5dB,提升了整车NVH性能。 关键词:Birfield球笼万向节;十字轴万向节;中间支承;NVH Simulation Analysis and Experimental Verification of Transmission Shaft Optimization Based on Automobile NVH Improvement Xu Jingli,Pan Qinggu Chen Duanying School of Mechanical and Electrical Engineering,Wuhan University of Technology,Wuhan摇 430070 [Abstract]摇 Birfield universal joint has the advantages of constant speed transmission and stable additional bending moment. Considering the influence of intermediate support vibration on the transmission shaft power per鄄 formance and vehicle interior noise,the design scheme of replacing the mid鄄cross universal joint with Birfield uni鄄 versaljoint is proposed. The ADAMS virtual prototype isused to simulate the three鄄cross鄄shaft universaljoint drive shaft and Birfield universal joint drive shaft under different input speed and different angle between the spindle shafts. The analysis shows that the vibration acceleration and torque fluctuation of the intermediate support of Bir鄄 field universaljointdriveshafttendtobemorestable. Comparisonandanalysisofvehicleinteriornoiseexperiments are carried out on carswiththetwokindsof transmission shaft. Theresultsshow that Birfieldun