Affiliation of Author(s):航空学院
Journal:Int J Mech Sci
Abstract:This paper studies the structural dynamic characteristics of an essential mechanical vector device on airship, which is described as a capsule-wing-rotor system. The root flexibility of the capsule and the gyro-effect from the tip rotor are considered to be distinct factors relative to the previous traditional situations, and the inherent structural geometries are also incorporated for multiple parametric analyses. The governing equation is established by Hamilton's principle, and the analytical solution and the numerical solution are derived by virtue of complex mode theory and Rayleigh-Ritz method, respectively. In case studies, the validity of the numerical solution is verified via a special error test technology. It is demonstrated that the boundary capsule flexibility, the gyro-effect and the system parameters all have great influences on the structural performance. The analyses indicate that the root flexibility tends to decrease the overall frequencies of the structure, and the gyro-effect strengthens the dimensional coupling of the structure intensely, leading to the occurrence of complicated complex-mode vibration phenomenon. The computations of critical boundaries under known aeromechanical excitations show that the design parameters used to stabilize the system are affected by the gyro-effect severely, demonstrating further optimization work for stability improvement is requisite. © 2019
ISSN No.:0020-7403
Translation or Not:no
Date of Publication:2020-01-01
Co-author:zqj,zhaoguoqing,Bo Wang
Correspondence Author:zqj,Zhang Xiayang
Associate Professor
Supervisor of Master's Candidates
Main positions:航空学会会员
Gender:Male
Alma Mater:北京航空航天大学
Education Level:北京航空航天大学
Degree:Doctoral Degree in Engineering
School/Department:航空学院
Discipline:直升机工程. 机械工程. Flight Vehicle Design
Business Address:明故宫校区
Contact Information:邮箱:zhangxiayang@nuaa.edu.cn
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