东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (3): 402-405.DOI: 10.12068/j.issn.1005-3026.2014.03.022

• 机械工程 • 上一篇    下一篇

内燃机曲轴轴系弯扭耦合非线性振动响应

梁明轩1，袁惠群2，赵天宇2，蔡颖颖2   

  1. (1. 东北大学 机械工程与自动化学院， 辽宁 沈阳110819； 2. 东北大学 理学院， 辽宁 沈阳110819)
  • 收稿日期:2013-06-20 修回日期:2013-06-20 出版日期:2014-03-15 发布日期:2013-11-22
  • 通讯作者: 梁明轩
  • 作者简介:梁明轩(1986-)，男，河南周口人，东北大学博士研究生；袁惠群(1954-)，男，辽宁沈阳人，东北大学教授，博士生导师.
  • 基金资助:
    国家高技术研究发展计划项目(2012AA040104).

Response of Nonlinear BendingTorsional Coupling Vibration of the Combustion Engine Crankshaft System

LIANG Mingxuan1， YUAN Huiqun2， ZHAO Tianyu2， CAI Yingying2   

  1. 1. School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China; 2. School of Sciences， Northeastern University， Shenyang 110819， China.
  • Received:2013-06-20 Revised:2013-06-20 Online:2014-03-15 Published:2013-11-22
  • Contact: YUAN Huiqun
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摘要： 建立了内燃机曲轴轴系弯扭耦合运动微分方程，模型中考虑了轴系变惯量、质量偏心和非线性干摩擦阻尼力等因素.采用数值积分法研究了质量偏心和转速对系统非线性动力学响应的影响；将系统微分方程组转化为非线性代数方程组，运用谐波平衡法获得了系统幅频特性.结果表明，谐波平衡法与数值积分法得到的结果吻合较好；气缸与活塞间阻尼会对系统响应振幅产生明显抑制作用；减小曲轴轴系偏心量可以有效地提高曲轴系统运动稳定性.

关键词: 曲轴轴系, 变惯量, 弯扭耦合, 非线性振动, 谐波平衡法, 幅频响应

Abstract: The bendingtorsional coupling dynamic model of the crankshaft system in combustion engine was presented by considering varied inertia， mass eccentricity and nonlinear friction damping force. Numerical integration methods were adopted to analyze the effects of the mass eccentricity and rotate speed on the dynamic performance， and the characteristics of amplitude frequency responses were obtained based on the harmonic balance method. It is shown that the harmonic balance method coincides well with the numerical method. The damping between the cylinder and piston can produce significant inhibition of system response amplitude. The motion stability can be effectively improved by reducing the eccentric of crankshaft system.

Key words: crankshaft system, varied inertia, bendingtorsional coupling, nonlinear vibration, harmonic balance method, amplitude frequency response

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