基于Ansys的卸船机前大梁上小车行走的动态响应分析

摘要

小车在卸船机前大梁上行走，前大梁承受移动载荷作用，会造成前大梁的振动，这对前大梁的强度和疲劳都有很大的影响，同时也会影响小车在前大梁上的运动稳定性。常用的静力分析无法得到前大梁的动态响应，本文利用Ansys有限元软件瞬态分析模拟了小车在前大梁上行走对前大梁产生的影响，最终得到了不同小车行走速度下，前大梁头部和跨中位置的动态响应。%When the trolley is moving on the front beam of the ship unloader,the front beam will bear the moving load which may cause vibration to the front beam,hence to take great impact on not only the strength and fatigue of the front beam,but also moving stability of the trolley on the beam.The widely-used static analysis fails to get the dynamic response of the front beam;in this case,the paper puts forward to adopt Ansys finite element software for transient analysis and mod-eling of the effect of the moving trolley on the front beam,in order to get the dynamic response of the front beam on the head and mid-span under the condition of different carts at normal travelling speed.