Simulation Research And Dynamics Analysis Of Multistage Gear Transmission System

The gear transmission system is one of the most common forms of transmission machinery. It is widely used in machinery, electronics, aerospace, aviation and so on. The working performance of the accessory gearbox’s gear transmission system has an important influence on its economic performance and the use of performance. For aviation accessory gearbox of multistage gear transmission system dynamics analysis and simulation research has important theoretical significance and engineering value.This paper makes a study on the casing 3 straight tooth cylindrical gear transmission system of the air accessory gearbox. Based on the finite element technique, it calculates the modal characteristic of the drive system and the gear contact dynamics, and makes simulation analysis of assembly error, manufacture error and rotational unbalance to find the influence of dynamics performance of gear. These works provide theoretical basis for the multistage structural improvement and optimization design of gear transmission system.(1) Establishing 3D simulation model of the multistage gear transmission system. Establishing the 3D model of the multistage gear transmission system by PRO/E. Parametric gear model is established, including the number of teeth, modulus, pressure angle, the width of tooth and so on.(2) Using finite element technology complete multistage gear transmission system dynamics analysis. This article uses the HYPERMESH to complete the model antecedent work before the finite element analysis. Then using the ANSYS complete the modal analysis of the multistage gear transmission system and get each order natural frequency and vibration of the model, so as to analysis the intrinsic characteristics of system. Using ANSYS/LS-DYNA to create the dynamic analysis model of the multistage gear transmission system, and concludes the change of the gear dynamic contact stress over time.(3) Considering the random errors caused by installation, manufacture and the unbalance of transmission shafts, this paper makes the dynamics analysis on the multistage gear transmission system, and quantitative concludes the influence of these factors on this system. These results provide effective guidance for improving the system dynamic performance and avoiding resonance.