轮胎刚度特性对大型民机前起落架摆振影响研究
Advances in Aeronautical Science and Engineering(2023)
Abstract
轮胎刚度作为轮胎动力学模型的重要参数之一,研究其对大型民机前起落架摆振的影响规律,可以从前起落架防摆设计角度为轮胎刚度设计提供参考依据.基于前起落架摆振非线性数学模型,使用Matlab/Mat-cont软件计算不同轮胎扭转刚度、轮胎侧弯刚度下的摆振区域图;研究轮胎扭转刚度、轮胎侧弯刚度对前起落架摆振的影响规律,对比二者对前起落架摆振影响的敏感度.结果表明:对前起落架摆振影响的敏感性,轮胎扭转刚度大于轮胎侧弯刚度;轮胎回正力矩系数每减小1%,扭转摆振最大临界阻尼减小0.88%,侧向摆振中速区最小临界减摆阻尼增大33.87%;减小轮胎扭转刚度,增大轮胎侧弯刚度有利于抑制大型民机前起落架摆振.
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Key words
large civil aircraft,nose landing gear,shimmy,tire stiffness,nonlinearity,bifurcation
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