Modal Analysis of the High Temperature and Pneumatic Duct System of the Aircraft
Based on the analysis of the loads, constraints and its mechanisms applying to the duct system, a finite element model of the anti-ice system is developed and the Lanczos algorithm is used for modal analysis. Then, the first eight natural frequencies and vibration modes are obtained. The thermodynamic parameters of the gas and the kinetic parameters of the ball joint which have influence on the modal analysis are considered. The results show that the first eight order natural frequencies of the anti-ice Part1 are low and concentrated, and decrease with temperature of the gas while increase with pressure of the gas. Meanwhile, the natural frequencies increase with the stiffness and starting torque of the ball joint. This work could be helpful for reliability design of civil-aircraft ducting system.
Yun Wu and Yijin Wu
J. Liu et al., "Modal Analysis of the High Temperature and Pneumatic Duct System of the Aircraft", Advanced Materials Research, Vol. 663, pp. 552-559, 2013