Using continuation analysis to identify shimmy-suppression devices for an aircraft main landing gear

被引:45
作者
Li, Yuan [1 ]
Howcroft, Chris [1 ]
Neild, Simon A. [1 ]
Jiang, Jason Zheng [1 ]
机构
[1] Univ Bristol, Fac Engn, Bristol BS8 1TR, Avon, England
基金
英国工程与自然科学研究理事会;
关键词
Shimmy-suppression device; Inerter; Continuation; Steady-state solution; PREDICTING AMPLITUDES; DYNAMICS; BIFURCATION; INERTERS; MODEL;
D O I
10.1016/j.jsv.2017.07.028
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
This paper considers several passive shimmy-suppression devices for a dual-wheel main landing gear (MLG) and proposes a method of selecting the device parameter values for which no shimmy occurs. Two of these devices include an inerter, a novel mechanical element with the property that the applied force is proportional to the relative acceleration between its terminals. A nonlinear mathematical model is developed to represent the MLG dynamics. A bifurcation study is then carried out to investigate the effects of the shimmy-suppression devices on the gear steady-state response. The aircraft forward speed and the device damping are chosen as the continuation parameters. A range of device parameter values that ensure the aircraft is free from shimmy instability for any forward speed within its operating region are identified. It is shown that the use of a proposed spring-damper configuration can result in a more robust device in terms of the device damping over that of a conventional shimmy damper. Two inerter-based shimmy-suppression devices are then considered and yield further benefits on expanding the zero-shimmy regions in the two-parameter bifurcation diagrams. (C) 2017 The Authors. Published by Elsevier Ltd.
引用
收藏
页码:234 / 251
页数:18
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