| With the development of high-speed, large-scale and heavy-load Ship, it is more and more important to improve the bearing capacity and stability of the marine gear transmission systems. At present, few researches on that are carried out in our country or other countries. Therefore, further investigation on ship's gear transmission system is of value to enhance its security, reliability and parameter optimization.Compared with common gear, large-scale herringbone gears used in ship possess a large coincident coefficient and large dimension. For its complicated characteristic of mechanics, it is difficult for us to research. In the research, with large-scale commercial finite element software, finite element analysis of the large-scale gear model is carried on. The concrete research contents are as follows.(1) The composition and operation principle of the large-scale and two stage gear transmission system are introduced. Parameter of geometry and initial load are calculated.(2) With Pro/E software, the three-dimension models of the herringbone gear are established. Then, the parts are assembled together to form the transmission model. Lastly, the 3D model is exported to ANSYS software by interface program.(3) In ANSYS software, the finite element model is developed by meshing the model with solid element. In order to apply load, rigid region are made between the inner surface of gear and mass node at rotate center. Contact pairs are defined between mesh teeth. A static analysis is developed after loading and solving the model.(4) Making dynamic analysis in ANSYS/LS-DYNA software, an analysis of the stress and strain changes in different mesh Position are made. The inner surfaces are defined as two rigid bodies for applying load.The research in the paper shows that the result of finite element analysis is rational. Large-scale herringbone gears operate stably. In the positions of start-engage and end-engage, a little acceleration of stress and strain comes forth.
|
PDF Full Text Request