门机小拉杆断裂原因的仿真研究

利用PRO/E软件建立港口门机的虚拟样机模型,以ADAMS为仿真平台,对门机进行动态仿真研究。由于平衡梁与臂架存在安装误差,加大了小拉杆的应力波动幅度,小拉杆的变形对仿真结果影响比较大,在ANSYS中生成小拉杆的模态中性文件,在ADAMS中用小拉杆的柔性体代替它,仿真得到小拉杆危险截面的动应力数据,找出了小拉杆过早断裂的原因,并提出解决方案。

Study on Rupture of Lower Link Bar of Portal Crane with Simulation

With the help of Pro/E,this paper sets up a virtual prototype for portal crane,and studies the crane's dynamic simulation based on the ADAMS platform. Due to the installing error of the balance girder and the jib, the stress fluctuation in the lower link bar and the influence to the simulation result by the deflection of the lower link bar might be more significant. This paper creates the modal neutral file for the lower link bar by ANSYS, substitutes it by a flexible body for the lower link bar to ADAMS. So the dynamic stress data on the dangerous section on the bar is obtained by simulation, and the main cause of the earlier fracture of the bar is found, and the suggested solution is given in this paper.