摘要
为了分析某商用车传动轴断裂的原因并解决该故障问题,建立传动轴有限元分析模型,对其进行约束模态分析,分析结果表明其一阶固有频率(84.9 Hz)与最高车速激励频率(83.6 Hz)相接近,将产生共振。通过增大轴管直径并且增加其壁厚以提高局部的刚度,改进之后传动轴的一阶横向弯曲频率为91.5 Hz,在其一阶激励频率范围之外,能够有效的避免产生共振。高速环岛测试结果表明传动轴改进之后变速箱壳体在Y向和Z向的振动加速度分别下降了65.7%和63.6%,剧烈振动现象明显减缓。该传动轴的道路测试频率与仿真频率基本一致,误差均在2%之内,验证了有限元分析方法的准确性和可靠性,成功有效地解决了该商用车传动轴断裂故障。
Aiming at analysising the cause of a commercial vehicle transmission shaft fracture and solving the problem, the finite element analysis model of transmission shaft was established, and the transmission shaft was constraint modal analysised. The analysis results showed that the first order natural frequency （84.9Hz） was closed to the maximum speed excitation frequency （ 83.6 Hz） , the resonance would be occurred. Improving local stiffness by increasing the diameter of the shaft tube and increasing the wall thickness, the first order lateral bending frequency was 91.5Hz after improving, it was outside the range of the first order excitation frequency, so the resonance would be effectively avoided. The high speed test around the island results showed tha tthe vibration acceleration of the gearbox housing in Y direction and Z direction decreased by 65.7% and 63.6% respectively after improving, the severe vibration phenomenon obviously slowed down. The test frequency of the driving test was basically consistent with the simulation frequency, the error were within 2%. The accuracy and reliability of the finite element analysis method were verified. The problem of transmission shaft of commercial vehicle was successfully solved.
出处
《机械设计与研究》
CSCD
北大核心
2017年第2期98-100,共3页
Machine Design And Research
基金
江西省2014年第二批科技专项(20142BBE50061)
2013年第五批科技专项(20135BBG70010)资助项目
关键词
传动轴
断裂
模态分析
道路测试
transmission shaft
fracture
modal analysised
driving test
