The Structural Dynamic Analysis Of Light Duty Port Machinery

As the rapidly development of inland terminal depot container transportation, as the load and unload tool of port container, the requirements of structural characteristics become higher and higher. To the structural design, the dynamic analysis is not only the important part of dynamic design, but also the key part of structural design. Therefore, making the dynamic analysis of engineer machine and studying their dynamic characteristics have great value economically and practically.The object of this paper is the 35t port crane of Nanjing. By means of the theory of structural dynamic analysis, the finite element method and the modal test technology, we carry out the static and dynamic analysis of the metal construct of the object. The dynamic characteristic is a important technical criteria.Firstly, the paper introduces the establishment of the three-dimensional finite element mechanical model according to the structural characteristics and practical working conditions of the port crane, by means of the finite element analysis software —ANSYS. Secondly, we make the modal analysis to ensure the intrinsic frequency and the mode shape of the structure. According to result of modal analysis, we make the harmonic response analysis, and ensure the corresponding vibration mode and the emergency of the vibration. Thirdly, we make the structural static analysis of the port crane structure to discover the characteristics of stress distribution of the port crane structure on the condition of typical working environment. Then we make transient state analysis, we get the coefficient of dynamic fore of every dangerous cross section. The analysis lays the base for other dynamic analysis and provides the theoretical foundation for the structural design.