基于ANSYS的DF40/200型架桥机金属结构有限元分析

Metal Structure Finite Element Design Technology of DF40/200 Bridge Erection Machine Based on ANSYS

【目的】为了保证施工安全,架桥机作为大型起重设备在投入使用前需要对其进行强度和刚度校核。【方法】以DF40/200型架桥机为研究对象,介绍了架桥机的结构组成和作业流程。通过APDL参数化建模方法在ANSYS软件中建立架桥机最危险架设和过孔工况的有限元模型,并对模型进行有限元计算。【结果】通过有限元分析得到,在7级风架设和6级风过孔工况下,整机的应力和位移结果。通过对结果进行分析,验证了架桥机在最危险架设和过孔工况下,其金属结构的强度和刚度均满足使用要求。【结论】主梁自重较大且是架桥机的主要承重部件,通过有限元计算获得了架桥机主梁金属结构的应力与位移云图,确定其结构设计满足要求,同时得出架桥机主梁存在优化空间,为之后的架桥机主梁优化提供了可靠的依据。

[Purposes]In order to ensure construction safety,as a large-scale lifting equipment,the bridge crane needs to be put into use before the strength and stiffness calibration.[Methods]This paper takes DF40/200 type bridge erection machine as the research object,and introduces the structural composition and operation process of bridge erection machine.The finite element model of the most dangerous erec⁃tion and over-hole condition of the bridge erection machine is established in ANSYS software through the parametric modeling method of APDL,and finally the finite element calculation is carried out on the model.[Findings]The results of stress and displacement of the whole machine under the erection in class 7 wind and over-hole condition in class 6 wind are obtained by finite element analysis.By analyz⁃ing the results,it is verified that the bridge erector meets the usage requirements under the most danger⁃ous erection and over-hole working conditions,as well as the strength and stiffness of its metal structure.[Conclusions]The main girder has a large self-weight and is the main load-bearing part of the bridge.Through the finite element calculation,the stress and displacement cloud diagram of the main girder metal structure of the bridge is obtained and it is determined that its structural design meets the requirements.And at the same time,it is concluded that the main girder of the bridge exists the optimization space for the subsequent optimization of the main girder of the bridge,which provides a reliable basis for the optimization of the main girder of the bridge.