Evolutionary Random Response Analysis for Aircraft Taxiing at Variable Velocity on Unevenness Runway
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摘要：
通过演变谱分析法对飞机起落架地面变速滑跑进行动响应分析.飞机在机场跑道变速滑行时,机场跑道基础激励将转化为非平稳随机激励,从而导致非平稳随机响应分析.采用演变随机激励表示该非平稳随机激励,用原平稳随机激励的功率谱密度和非线性变换表示其时变相关特性.利用演变谱法分析起落架系统的非平稳响应问题,最后通过数值算例验证了该方法的简便性和优越性.
In this paper, the non-stationary response problem of aircraft landing gear taxiing over an unevenness runway at variable velocity is studied by a so called evolutionary spectrum method. As an aircraft gliding on a runway of an airport, the foundation excitation of the runway is transformed to non-stationary random excitation, for the variable velocity of the aircraft. Fortunately,such kind of non-stationary random excitation can be represented as an evolutionary random excitation. The time varied correlation of this non-stationary random excitation can be expressed in a power spectral density of a stationary one and a nonlinear transformation. So the evolutionary spectrum method can be applied to analyze the non-stationary random response of the landing gear system. Numerical examples show that the suggested methods are effective.
作者：
赵莹芳 冷小磊
机构地区：
南京航空航天大学机械结构力学及控制国家重点实验室
出处：
《betway官方app 学报：自然科学版》 CAS 北大核心 2017年第3期91-95,共5页
基金：
国家自然基金(11172127) 江苏高校优势学科建设资助项目
关键词：
演变谱 起落架 滑跑 动响应 随机激励 非平稳
evolutionary spectrum landing gear taxiing dynamic response random excitation non-stationary
分类号：
O324 [理学—一般力学与力学基础]
