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将直升机传动系统简化为轴段和当量圆盘的串联系统,建立了直升机尾传动系统扭转振动的等效多自由度动力学模型.模型中考虑了啮合齿轮对的综合啮合误差激励和尾减齿轮的啮合刚度.针对系统的扭转动力学方程,求得了系统的扭转振动响应,分析了直升机尾传动系统在轴的不同扭转刚度和齿轮的不同啮合刚度下的扭转振动的特性,结果表明:与尾斜轴相联的当量圆盘的扭转角位移始终比与水平轴相联的当量圆盘的扭转角位移的数值大,即与尾斜轴相联的尾减输出齿轮振动大于输入齿轮;当轴的扭转刚度变化时,水平轴相联的当量圆盘与尾斜轴相联的当量圆盘的扭转角位移变化的趋势相反;啮合刚度对系统扭转角位移的影响比较大,在建模时应当给予重视.
The helicopter drive system is simplified as a series system of shaft segments and equivalent discs, and an equivalent multi-degree-of-freedom dynamics model of torsional vibration of the tail-drive system of helicopter is established.The integrated meshing error excitation and reduction gears The torsional vibration response of the system is obtained and the torsional vibration characteristics of the tail drive system of the helicopter under different torsional stiffness of the shaft and different meshing stiffness of the gear are analyzed. The angular displacement of the equivalent disc associated with the inclined shaft is always greater than the value of the torsional angle displacement of the equivalent disc associated with the horizontal shaft. That is, the tail reduced output gear associated with the tail inclined shaft vibrates more than the input gear. When the shaft When the torsional stiffness changes, the trend of torsional angular displacement of the equivalent disk associated with the horizontal axis is the opposite. The influence of meshing stiffness on the torsional angular displacement of the system is relatively large, Give attention.