Analysis of the airframe damping required to prevent the ground resonance of a skid helicopter
YU Renye1, WANG Gang1, SUN Xiuwen1, LI Xianzhe1, LI Zongxiu2
1. Aircraft Design Institute, Avic Harbin Aircraft Industry Group Co., Ltd., Harbin 150066,China；
2. Basic Teaching Department, Heilongjiang University of Finance and Economies,Harbin 150025,China
Abstract：Aanlysis of airframe damping required to preven ground resonance of skid helicopter is a important design issue. First,the simulation analysis and test verification study of helicopter vibration characteristics on the skid landing gear were carried out. The simulation methon is used to determine the equivalent mass and equivalent stiffness of skid helicopter airframe. Then use the ground resonance plane dynamic model for ground resonance analysis. Taking satisfying the design requirements of ground resonance stability damping as the constring goal, carrying out the optimization design analysis of the damping required. Finally, taking a certain type of helicopter as an example,the influence of the weight of the airframe and the parametes of the rotor admper on the required damping of the airframe is studied. The results show that the longitudinal translation mode of the skid helicopter needs the maximum damping under the condition weight and high temperature.
于仁业1，王刚1，孙秀文1，李先哲1，李宗秀2. 防止滑橇直升机地面共振机体需用阻尼分析[J]. 振动与冲击, 2022, 41(2): 305-311.
YU Renye1, WANG Gang1, SUN Xiuwen1, LI Xianzhe1, LI Zongxiu2. Analysis of the airframe damping required to prevent the ground resonance of a skid helicopter. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(2): 305-311.
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