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Finite Element Analysis of Large-scale and Two-stage Marine Herringbone Gear Transmission

Author: HuSheLai
Tutor: LiuZhengLinï¼›LiGuoDong
School: Wuhan University of Technology
Course: Vehicle Operation Engineering
Keywords: Large marine two herringbone gear 3D model Static contact analysis Dynamic contact analysis
CLC: U661
Type: Master's thesis
Year: 2005
Downloads: 314
Quote: 8
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Abstract


Marine gear transmission system is an important part of the marine power plant, as the ship speed, large-scale development overloaded, carrying capacity of marine gear transmission and drive stability put forward higher requirements. Therefore, in-depth study of marine multi-stage gear transmission, optimize system parameters to improve its safety, reliability has important theoretical significance. Compared with ordinary gear pair, a high degree of overlap of the marine herringbone gear system, size large, complex, difficult to study mechanical characteristics. How to build a reasonable model of the system is the key to the study of the mechanical characteristics of the system. In this paper, large commercial finite element software ANSYS, static and dynamic analysis of a large marine two herringbone gear transmission. Specific studies are as follows: (1) basic overview of the marine two herringbone gear system. Analysis of the composition of the system works, and calculate the geometric parameters of the gear system and rated operating conditions. (2) to establish a system of marine herringbone gear 3D models. CAD software Pro / E, Marine Herringbone Gear accurate 3D solid modeling, and the model is the standard assembly. While the assembled gear model into ANSYS software meshing. (3) marine herringbone gear static contact analysis. ANSYS software, the quality between the nodes of the definition of the inner ring and the rotating shaft is rigid area to determine the rotational degrees of freedom of the gear, the applied load and define the boundary conditions, defining the 3D contact element, finite element analysis system static bearing capacity. (4) Marine herringbone gear dynamic contact analysis. Nonlinear dynamics module ANSYS / LS-DYNA, defined gear inner ring as a rigid body, to ensure that the center of mass of the rigid body and gear rotation axis coincides applied load and define the boundary conditions on the rigid body. Engaging the tooth surface is defined as PowerPhone contact dynamic contact solving, analysis of the trend of the stress of the engagement process. The results show that: the rated load, the maximum stress of each word gear did not exceed the allowable stress of the material. Throughout the transmission process, the the the herringbone gear Vice contact pressure and stress change is small, stable transmission. Tooth biting and Nie, the tooth tip and tooth root has a smaller stress concentration. Reasonable solution to the part of the tooth model's torque is applied to the problem.

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CLC: > Transportation > Waterway transport > Marine Engineering > Ship Principle
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