起升动载激励下岸桥起升传动系统动态特性

为研究岸桥起升传动系统在起升复杂工况下的动态特性,建立了起升机构的动力学模型,模拟了传动系统所受的起升动载.考虑传动系统中齿轮副的时变啮合刚度和支撑刚度,建立了起升传动系统平移-扭转耦合的动力学模型,得到了电机从启动到匀速最后减速到停止的起升过程中传动系统各构件的振动响应,并对不同阶段的啮合力进行了频域分析.研究表明,传动系统各构件的扭转振动与起升动载有相同的变化趋势,且由于起升速度的变化,加速和减速阶段的啮合力频谱出现了边频带现象.

Dynamic Characteristics of Container Crane's Lifting Transmission System Under Lifting Dynamic Load

In order to study the dynamic characteristics of a container crane’s lifting transmission system under variable working conditions， a dynamic model of the lifting mechanism was established to simulate the lifting dynamic load. A translation-rotation coupling dynamic model was built with considering the time-vary mesh stiffness and support stiffness of every gear pair. The displacement response of every gear pair and vibration characteristics were obtained during acceleration， constant speed and deceleration stage， and mesh force at three stages were analyzed in frequency domain. The results showed that the lifting dynamic load cannot be ignored， and the changing trend of torsional vibration is identical to the lifting dynamic load. Meshing force spectrum at acceleration and deceleration stage has side-bands by the variation of velocity.