某半轴支柱式起落架低频刹车诱导振动特性研究

发布时间：2018-04-14 08:05

本文选题：起落架 + 动力学　；参考：《振动工程学报》2016年06期

【摘要】：针对起落架刹车抖振问题,以某半轴支柱式主起落架为对象,建立了该起落架的刚柔耦合动力学分析模型,进行了基本动力学模型校验,验证了模型的正确性和有效性。进而基于此模型建立了起落架刹车抖振动力学分析模型,并开展了起落架刹车抖振特性和参数影响研究。研究表明:起落架支柱刚度对起落架纵向刹车抖振现象影响较大,而结构阻尼、轮胎与地面之间摩擦系数对起落架刹车抖振现象影响较小。刹车力矩和刹车频率的增大都会使起落架纵向抖振现象趋于严重,当刹车频率从9 Hz增大33%时,轮轴处纵向加速度增长400%以上,轮轴处纵向位移和载荷增大超过100%;当刹车力矩从9000N·m增加33%时,起落架纵向位移和轮轴处纵向载荷增大50%左右,轮轴处的纵向加速度增长率超过200%。
[Abstract]:Aiming at the buffeting problem of landing gear brake, the rigid-flexible coupling dynamic analysis model of the landing gear is established. The validity and validity of the model are verified by checking the basic dynamic model.Based on this model, the buffeting dynamics analysis model of landing gear brake is established, and the buffeting characteristics and parameter influence of landing gear brake are studied.The results show that the stiffness of the landing gear pillar has a great influence on the buffeting phenomenon of the landing gear longitudinal brake, while the structural damping and the friction coefficient between the tire and the ground have little effect on the buffeting phenomenon of the landing gear brake.The increase of braking torque and braking frequency will make the longitudinal buffeting of landing gear become more serious. When the braking frequency increases from 9 Hz to 33, the longitudinal acceleration increases by more than 400%.When braking torque increases from 9000N m to 33N, the longitudinal displacement of the landing gear and the longitudinal load at the wheel shaft increase by about 50%, and the longitudinal acceleration growth rate at the wheel shaft exceeds 200%.
【作者单位】：南京航空航天大学机械结构力学及控制国家重点实验室;
【基金】：机械结构力学及控制国家重点实验室(南京航空航天大学)自主研究课题资助项目(0214G01) 国家自然科学基金资助项目(51305198) 江苏省普通高校研究生科研创新计划项目(KYLX_0297) 中央高校基本科研业务费专项资金资助项目高等学校博士学科点专项科研基金资助项目(20123218120003)
【分类号】：V226

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