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江铃全顺轻型客车液压悬置系统隔振特性研究
有效地隔离发动机的振动向车架的传递是汽车设计的一个重要问题,其对整车 舒适性和噪声水平有决定性的影响。液压悬置作为悬置元件,在汽车上应用越来越 多。本文结合江铃汽车集团公司课题<全顺轻型客车发动机液压悬置系统>开展研 究,本文的主要研究工作和结果为: 1.在阅读大量国内外参考文献的基础上,对发动机动力总成液压悬置元件的发 展进行了系统的总结,并根据其结构进行了科学分类,较为详尽地阐述了各种液压 悬置的工作原理,性能特点,并指出了其不足之处,以及今后的发展方向。对液压悬 置系统的发展历史也作了简要的回顾,并指出了它的发展趋势。 2.结合液压悬置样件就其结构和工作原理进行较详细的分析,然后给出其动特 性的定义。 3.建立了液压悬置的等效力学模型和橡胶悬置的力学模型,在此基础上建立了 动力总成6 自由度的力学模型。分析了发动机激励的特点,运用Newmark 法进行了 动力总成液压悬置系统稳态振动响应和瞬态工况,如汽车制动、转弯、路过不平路 面和发动机起动等工况下动力总成的瞬态响应计算,绘制了在此工况下动力总成质 心的振动响应曲线以及前左液压悬置、后橡胶悬置的动反力曲线,以及稳态工况下 各悬置点上下加速度与频率的关系曲线, 最后还计算出动力总成液压悬置系统的振 动传递率曲线。 4.通过实验对动力总成的基本参数进行了测试,分别对动力总成重心的确定和 质量惯性矩的计算进行了简要的介绍,最后给出实验结果。 5.针对江铃JX493ZQ 动力总成液压悬置系统开展了动力总成刚体六阶模态测试 和动力总成悬置系统隔振特性测试,研究了江铃全顺原车液压悬置系统的隔振特性 并进行了分析,为以后产品的开发提供了有价值的参考依据。 第一章 绪论··················································································································1 1.1 动力总成悬置的理想动特性········································································1 1.2 动力总成悬置元件的发展历史····································································2 1.3 动力总成悬置系统的发展历史····································································7 1.4 本文的研究内容和意义··············································································10 第二章 液压悬置的结构和工作原理··················································12 2.1 引言·············································································································12 2.2 液压悬置的结构和工作原理分析·····························································13 2.2.1 结构分析······························································································14 2.2.2 工作原理································································································16 2.3 液压悬置动特性的定义·············································································16 2.4 本章小结······································································································17 第三章 动力总成液压悬置系统的建模及响应分析·························18 3.1 液压悬置等效模型的建立·········································································18 3.2 橡胶悬置模型的建立·················································································21 3.3 动力总成液压悬置系统的建模 ·····························································22 3.4 发动机激励分析·························································································28 3.5 动力总成液压悬置系统稳态振动响应分析··············································29 3.6 动力总成液压悬置系统瞬态振动响应分析··············································32 3.6.1 发动机起动时动力总成瞬态振动响应分析·········································32 3.6.2 汽车制动时动力总成瞬态振动响应分析·············································34 3.6.3 汽车转弯时动力总成瞬态振动响应分析·············································35 3.6.4 汽车通过不平路面时动力总成瞬态振动响应分析·····························36 3.7 动力总成液压悬置系统的振动传递率计算··············································37 3.8 本章小结·····································································································39 第四章 动力总成基本参数测试··························································40 4.1 引言·············································································································40 4.2 重心位置的确定··························································································40 4.3 质量惯性矩的计算······················································································43 4.4 实验结果······································································································51 第五章 动力总成-液压悬置系统隔振特性试验研究························52 5.1 概述············································································································52 5.2 动力总成刚体六阶模态测试·····································································53 5.2.1 实验仪器连接框图·················································································53 5.2.2 实验方法及步骤·····················································································54 5.2.3 分析与讨论·····························································································56 5.3 动力总成悬置系统隔振特性测试·····························································57 5.3.1 实验方法及步骤·····················································································57 5.3.2 数据处理·································································································58 5.3.3 分析与讨论·····························································································60
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论文课题是液压悬置方向的,想下来来拜读一下
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学习这方面的东西
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