起重机端梁增级疲劳分析及改造方案  

Checking Computations of Restrained Beam Improvement after Level Increase

作　　者：曾宪渊[1] 刘岳兵[1] 吴晓[1] 

机构地区：[1]西南交通大学机械工程学院,四川成都610031

出　　处：《机械管理开发》2009年第4期98-99,共2页Mechanical Management and Development

摘　　要：近期有一桥式起重机工作情况发生变化,需要在更高的工作级别下作业。文章针对端梁的改造展开了研究。起重机端梁破坏一般是发生在截面变化的弯角处,破坏形式一般是疲劳失效,导致开裂或者屈服。为对现有起重机增级改造,进行了10 tx22.5桥式起重机端梁的理论计算,并结合有限元法对整机进行了建模和分析,给出了端梁的改造方案。Due to the recent work of a bridge crane circumstances change, the need to work at a higher level of operation, this thesis launched a research on the improvement of restrained beam after level increase. Restrained beam＇ s damage generally occurred in the comer, and generally destroyed in the form of fatigue failure. In order to improve the existing cranes by level, the paper makes model and analysis through the 10x22.5t restrained beam theoketical calculation： with the finite element method. After complete those calculations mentioned above, this thesis gives a reasonable wav to improve the restrained beam.

关 键 词：起重机 增级改造 许用应力法 有限元法 疲劳强度 

分 类 号：TH215[机械工程—机械制造及自动化]