关键词: 装载机, 驱动桥, 疲劳试验, 扭矩载荷谱, 工况合成, 雨流矩阵外推

Abstract: Taking the loader front driving axle torque load spectrum compilation of fatigue test as an example,the result which from the rain-flow counting of the effective measured data of different kinds of working conditions,has been synthesized according to the proportional coefficient of working conditions.The extrapolation of rain-flow matrix has been applied to extrapolating the torque load spectrum of working conditions synthesis.The whole life cycle of two-dimensional front driving axle torque load spectrum has been gained.The load spectrum of fatigue test and intensified fatigue test has been compiled.The torque load spectrum of the drive axle fatigue test can reflect the actual operation of the loader more realistic and effectively,which provides the basis for the anti-fatigue design and fatigue life prediction of the loader transmission system.Loading an intensified fatigue test load spectrum of 10.3 hours is equivalent to the actual operation of the loader for 609.2 hours,which means that the fatigue test process of driving axle is accelerated greatly.

Key words: loader, driving axle, fatigue test, torque load spectrum, working conditions synthesis, rainflow matrix extrapolation