| 单活塞液压自由活塞发动机活塞振动特性研究 |
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| 引用本文： | 荆崇波,吴维,苑士华,陈智.单活塞液压自由活塞发动机活塞振动特性研究[J].北京理工大学学报,2009,29(4):304-308. |
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| 作者姓名： | 荆崇波 吴维 苑士华 陈智 |
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| 作者单位： | 北京理工大学,车辆传动国家重点实验室,北京,100081 |
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| 基金项目： | 国家部委基础科研项目 |
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| 摘 要： | 研究单活塞液压自由活塞发动机原理样机活塞组件振动特性.建立活塞组件动力学模型,导出了活塞振动方程,研究了活塞的幅频特性并运用相平面法分析了活塞运动的稳定性.活塞组件运动属于单自由度变阻尼、变刚度自振振动.活塞运动频率与振幅间存在单调上升关系且受压缩比的限制,其稳定极限环存在的区域由进气口位置和活塞行程决定,下止点位置位于稳定极限环存在区域是实现自激振动的关键,工作频率可以在零和自激振动频率之间调整.
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| 关 键 词： | 自由活塞发动机 振动特性 稳定性 液压系统 |
| 收稿时间： | 5/8/2008 12:00:00 AM |
Piston Oscillation Characteristics of Single Piston Hydraulic Free-Piston Engines |
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| JING Chong-bo,WU Wei,YUAN Shi-hua and CHEN Zhi.Piston Oscillation Characteristics of Single Piston Hydraulic Free-Piston Engines[J].Journal of Beijing Institute of Technology(Natural Science Edition),2009,29(4):304-308. |
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| Authors: | JING Chong-bo WU Wei YUAN Shi-hua and CHEN Zhi |
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| Institution: | National Key Lab of Vehicular Transmission;Beijing Institute of Technology;Beijing 100081;China |
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| Abstract: | Piston oscillation characteristics of a single piston hydraulic free-piston engine prototype are studied.Dynamical model of the piston assembly is built up and the oscillation of motion deduced.The amplitude-frequency characteristic is given and the stability of the piston motion is analyzed by the phase plane method.The piston motion is a kind of single-degree-of-freedom,variational damping and stiffness autooscillation oscilation.The piston vibration frequency has a monotonous increasing relationship with... |
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| Keywords: | free-piston engines oscillation characteristic stability hydraulic system |
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