450t/80t吊车舱口板开裂机理研究及对策  

Study on the Cracking Mechanism and Countermeasure of 450t/80t Crane Hatchboard

作　　者：孙涛[1] 罗会信[1] 党章[1] 陈驰中[2] 

机构地区：[1]武汉科技大学机械学院,湖北武汉430081 [2]武汉钢铁股份有限公司炼钢总厂三分厂,湖北武汉430083

出　　处：《机械设计与制造》2016年第9期155-157,共3页Machinery Design & Manufacture

基　　金：基金项目:铜合金压铸模失效机理及其表面复合原理研究(51375353)

摘　　要：以某炼钢厂连铸车间炉前450t/80t铸造起重机为研究对象,针对吊车主梁舱口板过渡圆角处出现裂纹的问题,运用有限元技术对铸造起重机桥架结构进行仿真分析。首先对起重机桥架整体CAE建模,并与实测结果进行对比,验证有限元模型正确后对舱口板最危险的工况进行静应力分析。计算结果表明,舱口板最大应力处即为裂纹所在位置。结合实际观察情况,以有限元计算结果为依据,认为舱口板过渡圆角处的局部应力较大且截面框架薄弱是造成该处开裂的主要原因。最后提出加固方案,由计算结果可知加固效果明显。Taking the 450t/80t molten crane in a continuous casting steel plant as the research object, aimed at the crook problem of the hatchboard fillet on the main beam, the molten crane bridge structure was simulated by finite element technique. First overall CAE modeling on the crane bridge, and compared with the measured results, then the static stress of the hatchboard was simulated in the most dangerous working condition after the finite element model was verified correctly. Results show that the position of maximum stress on the hatchboard is just at the crook location. Combined with the actual observation, based on the results of finite element calculation, the main cause of crack on the hatchoard fillet was that the local stress is large and the section of the frame is weak. Finally,the reinforcement scheme was put forward, and the results show that reinforcement effect is obvious.

关 键 词：铸造起重机 舱口板 裂纹 有限元 加固 

分 类 号：TH16[机械工程—机械制造及自动化]