Influnce of Support Stiffness on Free Vibration and Force Transmission Rate of Helicopter Driveshaft

Abstract:

Bending vibration of helicopter driveshaft is a main source causing damage of bearing supports and noise of transmission system. Firstly, we get driveshaft element stiffness matrices and mass matrices based on the finite element theory. Then, we get calculate matrix eigenvalue of the entire system. Finally, we get natural frequencies and natural modes of different bearing system. Mass eccentricity is one of the main excitation sources of the transmission system vibration and noise. This excitation is transmitted to base by bending vibration of drive shaft, causing body vibration and noise. As transmission rate changes with different bearing stiffness of supports, it can be employed to reflect influence from bearing stiffness of supports on bending vibration of axis. Transmission rate can be used as input parameters (motivation) or goal parameters to reflect the performance of driveshaft vibration.

• Periodical: Applied Mechanics and Materials (Volumes 226-228)
• Pages: 39-43
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.226-228.39
• Online since: November 2012
• Authors: Huan Jun Wang, Da Wei Yu, Yong Wei Yue, Chao Wang
• Keywords: Driveshaft Vibration, Force Transmission Rate, Model Analysis, Numerical Method

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