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Mathematical Problems in Engineering
Volume 2018, Article ID 6141035, 12 pages
Research Article

Influence of Shaft Torsional Stiffness on Dynamic Response of Four-Stage Main Transmission System

1College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2Engineering and the Environment, University of Southampton, Boldrewood Innovation Campus, Southampton SO16 7QF, UK

Correspondence should be addressed to Rupeng Zhu; nc.ude.aaun@uhzpr

Received 5 October 2017; Revised 19 December 2017; Accepted 1 January 2018; Published 8 April 2018

Academic Editor: Jussi Sopanen

Copyright © 2018 Yuan Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Dynamic response analysis has potential for increasing fatigue life of the components in the transmission of a multistage main transmission system. The calculated data can demonstrate the influence of shaft torsional stiffness on dynamic characteristics of the system. Detecting key shafts of the system and analyzing their sensitivity are important for the design of four-stage helicopter gear box. Lumped mass method is applied for dynamic modeling and Fourier method is used to solve differential equation of the system. Results of the analysis indicate that key shafts can be designed carefully to improve the performance of the transmission system.