残损航空器搬移拖车液压悬架参数分析及优化
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摘要
为了合理选择残损航空器搬移拖车液压悬架参数使整车具有较好的动态性能,建立了两自由度液压悬架模型,推导出液压悬架的刚度和阻尼方程;根据工程实际应用建立了搬移拖车多体动力学模型、液压系统模型,进行联合仿真,分析得出了悬挂液压系统主要参数对搬移拖车动态性能的影响规律;并以车架加权加速度均方根值最小为优化目标,基于遗传算法对液压悬架主要参数进行优化设计。优化结果表明:在随机输入和脉冲输入下车身垂直加速度均方根值分别降低了26.1%和31.6%,有效提高了搬移拖车行驶过程中的稳定性。
The damage d aircraft trailer would have better dynamic performance when the relevant parameters of its hydraulic suspension were tuned reasonably. The two degree of freedom hydraulic suspension model was established,and the stiffness and damping equation of hydraulic suspension was derived;The muti-body dynamic model and hydraulic system model of damaged aircraft dynamic was established by using co-simulation technique according to the practical application of engineering. The relation between dynamic performance of the trailer and main parameters of its hydraulic suspension was analyzed through cosimulation. An optimal design model was established based on Genetic Algorithm and its objective function with the vehicle body vertical acceleration of the weighted root mean square(RMS)sis defined. The result shows that the weighted RMS acceleration is reduced by 26.1% and 31.6% under the input of random road and impulses of road surface respectively. The vehicle body acceleration power spectral density decreased significantly,the vehicle stability performance was improved.
The damage d aircraft trailer would have better dynamic performance when the relevant parameters of its hydraulic suspension were tuned reasonably. The two degree of freedom hydraulic suspension model was established,and the stiffness and damping equation of hydraulic suspension was derived;The muti-body dynamic model and hydraulic system model of damaged aircraft dynamic was established by using co-simulation technique according to the practical application of engineering. The relation between dynamic performance of the trailer and main parameters of its hydraulic suspension was analyzed through cosimulation. An optimal design model was established based on Genetic Algorithm and its objective function with the vehicle body vertical acceleration of the weighted root mean square(RMS)sis defined. The result shows that the weighted RMS acceleration is reduced by 26.1% and 31.6% under the input of random road and impulses of road surface respectively. The vehicle body acceleration power spectral density decreased significantly,the vehicle stability performance was improved.
引文
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[2]鲍卫宁,胡三宝.单气室油气悬架阻尼特性分析[J].机械设计与制造,2014(11):79-81.(Bao Wei-ning,Hu San-bao.Analysis on damping characteristics ofhydro-penumatic suspension with single gas cell[J].Machinery Design&Manufacture,2014(11):79-81.)
[3]潘公宇,陈云.主动液压悬架建模及最优控制[J].重庆理工大学学报:自然科学版,2015(4):1-6.(Pan Gong-yu,Chen Yun.Research on modeling of active controlledhydraulic suspension and design of optimal controller[J].Journal ofChongqing University of Technology:Natural Science,2015(4):1-6.)
[4]汪若尘,黄欢,孟祥鹏.基于虚拟样机模型的液压ISD悬架动态性能分析[J].机械工程学报,2015,51(10):137-142.(Wang Ruo-chen,Huang Huan,Meng Xiang-peng.Dynamic performan-ce analysis of hydraulic ISD suspension based on virtual prototypemodel[J].Journal of Mechanical Engineering,2015,51(10):137-142.)
[5]杨勇,易小刚.全地面起重机多学科联合仿真分析平台开发[J].机械科学与技术,2012,31(7):124-129.(Yang Yong,Yi Xiao-gang.The multi-disciplinary co-simulation analysisplatform for all-terrain crane[J].Mechanical Science and Technology forAerospace Engineering,2012,31(7):124-129.)
[6]赵岩,丁建完,陈立平.多轴车辆悬架及转向系统多领域统一建模与仿真[J].机械科学与技术,2015,34(2):277-281.(Zhao Yan,Ding Jian-wan,Chen Li-ping.Multi-domain united modelingfor the suspension and steering system of multi-axis vehicle[J].Mecha-nical Science and Technology for Aerospace Engineering,2015,34(2):277-281.)
[7]马国清,檀润华,吴仁智.油气悬挂系统非线性数学模型的建立及其计算机仿真[J].机械工程学报,2002,38(5):95-99.(Ma Guo-qing,Tan Run-hua,Wu Ren-zhi.Nonlinear mathematicalmodel of hydro-pneumatic suspension system establish and simulation[J].Journal of Mechanical Engineering,2002,38(5):95-99.)
[8]孙家.民航安全管理和应急处置[M].北京:中国民航出版社,2012.(Sun Jia.Civil Aviation Safety Management and Emergency Response[M].Beijing:China Civil Aviation Press,2012.)
[9]田玲玲,谷正气,李伟平.非线性油气悬架系统平顺性仿真与参数优化设计[J].中南大学学报:自然科学版,2011,42(12):3715-3721.(Tian Ling-ling,Gu Zheng-qi,Li Wei-ping.Ride comfort simulationand parameters optimization design of nonlinear hydro-pneumatic susp-ension system[J].Journal of Central South University:Science and Tec-hnology,2011,42(12):3715-3721.)