作　　者： (杜习超）; (朱强）; (周高峰）;

机构地区： 郑州大学机械工程学院,郑州450001

出　　处： 《煤矿机械》 2017年第8期179-182,共4页

摘　　要： 在有限元分析软件ANSYS中建立桥式起重机主梁模型,进行了静强度和刚度分析;在此基础上,对桥式起重机主梁结构进行优化设计;采用对数正态分布模拟起重载荷,对优化后的结构进行了可靠性分析,最后应用MATLAB编程计算可靠度,研究表明:优化后的桥式起重机主梁结构强度和刚度满足使用要求,但其刚度可靠度存在一定不足,需考虑进行可靠性的优化设计;此外,由各随机因素对主梁极限状态函数的灵敏度可知,适当增加主梁上下翼板厚度,可有效提高桥式起重机主梁的可靠度。 With the finite element analysis software ANSYS, the finite element model of girder of bridge crane is established for the structural analysis of static strength and stiffness; then, the optimal girder structure of bridge crane is accomplished by the deterministic optimization design; with a lognormal distribution to simulate the lifting load on the optimized model, a reliability analysis for the optimal structure is performed; finally, the reliability of structural stiffness is calculated with MATLAB programmin~ The results show that, the structural strength and stiffness of the optimized girder of bridge crane can meet the use requirements, but its stiffness reliability does not meet the requirements, which should be considered for girder structural reliability optimization design. In addition, as to the sensitivity of various random factors on the limit state function of girder, the appropriate increase of girder upper and lower wing plate thickness can effectively improve the reliability of the bridge crane metal structure.

关 键 词： 桥式起重机主梁 结构优化 可靠性分析