吉林大学学报(工学版) ›› 2020, Vol. 50 ›› Issue (1): 44-52.doi: 10.13229/j.cnki.jdxbgxb20181239

• 车辆工程·机械工程 • 上一篇    下一篇

多级刚度双质量飞轮扭转特性建模与试验验证

史文库1(),陈龙1,张贵辉2,陈志勇1()   

  1. 1. 吉林大学 汽车仿真与控制国家重点实验室,长春 130022
    2. 吉林大华机械制造有限公司,长春 130103
  • 收稿日期:2018-09-26 出版日期:2020-01-01 发布日期:2020-02-06
  • 通讯作者: 陈志勇 E-mail:shiwk@jlu.edu.cn;chen_zy@jlu.edu.cn
  • 作者简介:史文库(1960-),男,教授,博士生导师.研究方向:汽车振动噪声分析与控制.E-mail:shiwk@jlu.edu.cn
  • 基金资助:
    国家重点研发计划项目(2018YFB0106203);国家自然科学基金项目(51205158)

Modeling and tests for torsional characteristics of multi-stage stiffness dual mass flywheel torsional dampers

Wen-ku SHI1(),Long CHEN1,Gui-hui ZHANG2,Zhi-yong CHEN1()   

  1. 1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China
    2. Dahua Machine Manufacturing Co. Ltd. , Changchun 130103, China
  • Received:2018-09-26 Online:2020-01-01 Published:2020-02-06
  • Contact: Zhi-yong CHEN E-mail:shiwk@jlu.edu.cn;chen_zy@jlu.edu.cn

摘要:

针对多级刚度双质量飞轮扭转特性建模和分段点平滑拟合展开了研究。首先,在分析多级刚度双质量飞轮工作原理基础上,建立了考虑分段刚度、阻尼非线性的双质量飞轮扭转特性数学模型,并通过台架试验验证模型准确性。其次,针对所建模型存在跳跃间断点以及仿真过程中可能出错的问题,采用反正切函数对模型进行平滑拟合,得到基于反正切拟合函数的双质量飞轮非线性模型。最后,对平滑拟合前、后模型进行对比分析,结果表明:采用反正切函数平滑拟合对模型精度影响较小,使模型分段点和临界点平滑过渡,提升了模型仿真稳定性。

关键词: 车辆工程, 多级刚度, 双质量飞轮, 非线性建模, 反正切函数, 台架试验

Abstract:

The torsional characteristics modeling and piecewise point smooth fit of multi-stage stiffness Dual Mass Flywheel (DMF) are studied. Firstly, based on the analysis of the working principle of multi-stage stiffness DMF, a mathematical model of the torsional characteristics of the DMF with piecewise stiffness and damping nonlinearity is established, and the accuracy of the model is verified through bench test. Secondly, to solve the problems of jump discontinuities in the model, and the errors that may occur during the simulation process, the inverse tangent function is used to smoothly fit the model, and the nonlinear model of the DMF based on the arctangent fitting function is obtained. Finally, the models before and after smooth fitting are compared and analyzed. The results show that the smooth fitting of the arctangent function has little effect on the accuracy of the model, which can make the model piecewise point and the critical point smoothly transition, and improve the model simulation stability.

Key words: vehicle engineering, multi-stage stiffness, dual mass flywheel (DMF), nonlinear torsional characteristics modeling, arctangent function, bench test

中图分类号: 

  • U461.1

图1

周向长弧形双质量飞轮结构图"

图2

两级扭转刚度弧形弹簧结构"

图3

扭转刚度特性曲线"

图4

弧形弹簧摩擦力示意图"

图5

弧形弹簧结构示意图"

图6

弧形弹簧单元受力图"

图7

摩擦力矩与扭转角度关系曲线"

图8

拟合曲线"

表1

双质量飞轮设计参数"

变量 设计值 试验值
一级刚度/[N?m?(°)-1] 3.5 3.2
二级刚度/ [N?m?(°)-1] 12 11
间隙转角/(°) 10 9
基础阻尼/[N?m?s?(°)-1] 12 12.27
一级刚度扭转角度/(°) 44.5 44.5
最大转角/(°) 60 59.61

图9

双质量飞轮试验台架"

图10

双质量飞轮扭转特性曲线"

图11

双质量飞轮扭转特性曲线对比图"

图12

模型误差曲线"

图13

原函数与拟合函数对比曲线"

图14

分段点A的局部放大图"

图15

拟合误差"

图16

拟合函数速度曲线"

图17

拟合函数加速度曲线"

图18

原模型与平滑后模型对比图"

图19

平滑模型误差"

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