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航空柱塞泵缸体疲劳分析及寿命预测方法

王岩 王晓晴 郭生荣 卢岳良 刘胜

王岩, 王晓晴, 郭生荣, 等 . 航空柱塞泵缸体疲劳分析及寿命预测方法[J]. 北京航空航天大学学报, 2019, 45(7): 1314-1321. doi: 10.13700/j.bh.1001-5965.2018.0646
引用本文: 王岩, 王晓晴, 郭生荣, 等 . 航空柱塞泵缸体疲劳分析及寿命预测方法[J]. 北京航空航天大学学报, 2019, 45(7): 1314-1321. doi: 10.13700/j.bh.1001-5965.2018.0646
WANG Yan, WANG Xiaoqing, GUO Shengrong, et al. Fatigue analysis and life prediction method for cylinder block of aviation piston pump[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(7): 1314-1321. doi: 10.13700/j.bh.1001-5965.2018.0646(in Chinese)
Citation: WANG Yan, WANG Xiaoqing, GUO Shengrong, et al. Fatigue analysis and life prediction method for cylinder block of aviation piston pump[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(7): 1314-1321. doi: 10.13700/j.bh.1001-5965.2018.0646(in Chinese)

航空柱塞泵缸体疲劳分析及寿命预测方法

doi: 10.13700/j.bh.1001-5965.2018.0646
基金项目: 

国家自然科学基金 51775013

航空科学基金 2016ZC09007

详细信息
    作者简介:

    王岩 男, 博士, 副教授, 硕士生导师。主要研究方向:流体传动与控制、液压系统热管理、流体数值模拟与仿真

    王晓晴 女, 硕士研究生。主要研究方向:流体传动与控制、流体数值模拟与仿真

    郭生荣 男, 硕士, 研究员, 硕士生导师, 973首席科学家。主要研究方向:流体传动与控制、飞机应急能源系统、飞机辅助动力系统

    卢岳良 男, 硕士, 研究员, 硕士生导师。主要研究方向:流体传动与控制、飞机应急能源系统

    刘胜 男, 硕士, 高级工程师。主要研究方向:流体传动与控制

    通讯作者:

    王岩, E-mail: wybuaa@buaa.edu.cn

  • 中图分类号: V245

Fatigue analysis and life prediction method for cylinder block of aviation piston pump

Funds: 

National Natural Science Foundation of China 51775013

Aeronautical Science Foundation of China 2016ZC09007

More Information
  • 摘要:

    缸体是航空柱塞泵核心部件之一,其直接影响航空柱塞泵的功能。针对目前缸体寿命研究的实验周期长、缺乏理论分析方法的不足,提出了基于有限元分析和线性累积损伤理论的缸体疲劳分析和寿命预测方法。首先,基于理论力学和材料力学建立缸体的力学模型,在MATLAB平台上进行仿真分析,计算缸体受力;其次,建立缸体的有限元模型,在ANSYS平台上计算缸体的应力和应变;然后,将缸体应力、应变等结果导入nCode中,基于线性累积损伤理论,探究缸体的薄弱部位及影响缸体疲劳寿命的因素;最后,进行实验验证。结果表明,靠近配流盘一侧的柱塞腔外壁较为薄弱,容易出现疲劳破坏,与仿真结果基本吻合,验证了所提的缸体疲劳分析和寿命预测方法的正确性,为结构紧凑型柱塞泵缸体的设计提供参考。

     

  • 图 1  基于有限元分析和线性累积损伤理论的缸体疲劳分析和寿命预测方法

    Figure 1.  Cylinder block fatigue analysis and life prediction method based on finite element analysis and linear cumulative damage theory

    图 2  柱塞组件排油行程受力分析

    Figure 2.  Stress analysis of piston assembly in oil discharge stroke

    图 3  柱塞接触力求解MATLAB流程

    Figure 3.  MATLAB flow for solving piston contact force

    图 4  疲劳寿命分析计算流程

    Figure 4.  Fatigue life analysis and calculation process

    图 5  柱塞与缸孔接触力曲线

    Figure 5.  Contact force curves of piston and cylinder bore

    图 6  缸体有限元网格模型

    Figure 6.  Finite element mesh model of cylinder block

    图 7  工况28 MPa、5 400 r/min时缸体的应力、应变云图

    Figure 7.  Stress contour and strain contour of cylinder block under working condition of 28 MPa and 5 400 r/min

    图 8  工况28 MPa、5 400 r/min时缸体的疲劳寿命云图

    Figure 8.  Fatigue life contour of cylinder block under working condition of 28 MPa and 5 400 r/min

    图 9  不同转速时压力-应力曲线

    Figure 9.  Pressure-stress curves at different speeds

    图 10  不同转速时压力-应变曲线

    Figure 10.  Pressure-strain curves at different speeds

    图 11  不同转速时压力-疲劳寿命曲线

    Figure 11.  Pressure-fatigue life curves at different speeds

    图 12  试件疲劳损伤部位

    Figure 12.  Fatigue damage part of specimen

    表  1  柱塞泵结构参数

    Table  1.   Structure parameters of piston pump

    参数 数值
    mz/kg 0.125
    Rf/mm 40
    d/mm 20
    z 9
    α′/(°) 32
    γ/(°) 15
    f0 0.05
    f1 0.12
    lmin/mm 30
    LH/mm 18
    LZ/mm 10
    R1/mm 30
    R2/mm 33.5
    R3/mm 42.5
    R4/mm 48.5
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-11-12
  • 录用日期:  2018-12-21
  • 刊出日期:  2019-07-20

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