Static And Dynamic Characteristics Analysis Of Overhead Crane Bridge Structure And Optimization

At present,the reasons that the finite element analysis of the overhead crane bridge structure has the poor promotion effect mainly include: the lack of verification links,the poor reliability of the results,the large analytical workload and the error-prone operation.To solve these problems,this paper adds the verification of the credibility of the finite element analysis results and the construction of a simple and easy-to-use simulation platform during the finite element analysis of the bridge structure.The main contents of this paper are as follows:Firstly,in the process of finite element analysis of bridge crane structure,theoretical calculation analysis and test analysis are integrated.From the comparative analysis of stiffness analysis results,a more practical finite element anaysis method is obtained.By using the interactive simulation of ANSYS APDL and Workbench sub-model,the stress singularity points at the key locations of the simplified finite element model are processed.Secondly,the static and dynamic characteristics of the bridge structure are studied by ANSYS APDL.Static analysis,modal analysis and harmonic response analysis are carried out.Static stiffness,static strength and dynamic stiffness were extracted to check the original prototype and used as an index for the optimization of bridge structure.The transient dynamic analysis of the lifting process of the girder structure of the bridge crane is carried out to obtain the response curves of the displacement,velocity and acceleration at the mid-span position.At the same time,the influence of different lifting time on the dynamic response of the girder beam's displacement,velocity and acceleration is obtained.Finally,ANSYS APDL was used to optimize the section size of the main girder and theoretical calculations were used to optimize end beam height to obtain an optimized design model.At the same time,a simulation platform which is easy to use is built with VC++/MFC and ANSYS APDL.The corresponding macro file can be invoked by clicking the ANSYS buttons to achieve static analysis and modal analysis,harmonic response analysis,transient dynamic analysis and optimization analysis.