63t通用桥式起重机端梁开裂机理与对策研究

Research on cracking mechanism and countermeasures of end beam of 6t common bridge crane

文中针对某钢厂63 t通用桥式起重机端梁出现的裂纹,对桥式起重机进行了几何测试,对车轮直线度和车体方框进行测量,发现该机车轮直线度和车体方框均超出国家标准。然后,对该桥式起重机进行现场工况应力测试,建立有限元仿真模型,通过有限元建模仿真结果和现场工况应力测试对比,验证了建模的可靠性。根据几何测试、应力测试和有限元仿真建模的结果,结合该机端梁的结构特点,提出了加固方案。在对端梁进行加固后,再次进行现场应力测试并进行后续现场跟踪,印证了加固方案的可行性。

For cracks of the end beam of a 63t common bridge crane in a steel factory,the geometric test of the bridge crane was carried out,and the straightness of the wheels and the frame of the car body were measured.It was found that the straightness of the wheels and the frame of the car body of the crane exceeded the national standard.Then,the stress test of the bridge crane under field conditions was carried out,and the finite element simulation model was established.By comparing the finite element simulation results with the stress test under field conditions,the reliability of the modeling was verified.According to results of geometric test,stress test and finite element simulation modeling,and combined with the structural characteristics of the end beam,the reinforcement scheme was put forward.After the end beam was strengthened,the feasibility of the reinforcement scheme was proved by the on-site stress test again and the follow-up on-site tracking.