轨道压板螺栓焊缝动力学等效模拟研究

针对起重机轨道压板螺栓焊缝的开裂现象,提出一种等效模拟的动力学仿真方法对其进行分析。以某炼钢厂铸造起重机为对象,采用Adams和HyperMesh进行联合仿真,在Adams中借助拉压弹簧阻尼器等效模拟螺母的挤压以及焊缝的连接,以减少有限元分析的计算量;在HyperMesh中将桥架梁作柔性化处理,以提高整个仿真模型在竖直方向的振动精度。将有限元仿真结果与实测值进行比较,结果表明,焊缝处应力值的仿真结果与实测值相一致。这验证了等效螺栓焊缝动力学仿真方法的正确性和有效性。

Equivalent simulation of dynamics of the rail clamp bolt weld

To resolve the breakage of the rail clamp bolt weld on cranes, an equivalent dynamics simulation method was proposed. With a steelworks ladle crane as the object, Adams and HyperMesh joint simulation was carried out. In Adams, tension and compression spring damper plate was employed to simulate weld nut squeezing and weld connection in order to reduce the amount of finite element calculation. In HyperMesh, bridge beams received flexible treatment to improve the vibration accuracy of the simulation model in the vertical direction. The finite element simulation results were compared with the measured values, and it is shown that the simulation results of the stress on the weld agree well with the measured values, which suggests that the proposed equivalent dynamics simulation method is correct and effective.