DLQ25A轮胎式起重机底架结构rn开裂成因的应力分析

摘要

For the cracking on the chassis of DLQ25A movable crane, the ANSYS program is used to establish the shell-elements FEA model of main beam with supporting leg. During the establishing model, the technology of the displacement couple simulates successfully the link between the fixed legs of the movable legs. And the method is made for applying the load of non-uniform distribution. The result from the model is identical to the actuality of the chassis. This work provides the consideration bases for improving the design of chasses.%针对DLQ25A轮胎起重机底架结构开裂的情况，采用ANSYS程序建立了主梁与支腿一体的板壳单元有限元分析模型。在建构模型中，作者采用节点位移耦合技术，成功地模拟了轮胎起重机底架结构中的固定支腿与活动支腿的连接，同时提出了处理非均匀分布的圆周载荷的方法。该分析模型与实际情况较为吻合，为改善该机底架结构的设计提供了有力的理论依据。