1.三一重机数字仿真研究院,昆山 215300
2.先进锻压成形技术与科学教育部重点实验室(燕山大学),秦皇岛 066004]
3.河北工业职业技术大学,石家庄 050091
刘利壮,男,1989年生,山东济宁人,主管工程师;主要研究方向为结构强度与耐久性分析;E-mail:lz_liu0911@163.com。
杜建(通信作者),男,1989年生,江苏宿迁人,主管工程师;主要研究方向为车辆动力学数值仿真与整车耐久性能分析;E-mail:dujiancaeri@163.com。
收稿:2024-07-14,
修回:2024-09-14,
纸质出版:2026-03-15
移动端阅览
刘利壮,杜建,刘志雷,等. 基于多体动力学与离散元联合仿真的装载机前车架焊缝疲劳分析与优化[J]. 机械强度,2026,48(3):114-121.
LIU Lizhuang,DU Jian,LIU Zhilei,et al. Fatigue analysis and optimization of welds in the front frame of loaders based on multi-body dynamics and discrete element joint simulations[J]. Journal of Mechanical Strength,2026,48(3):114-121.
刘利壮,杜建,刘志雷,等. 基于多体动力学与离散元联合仿真的装载机前车架焊缝疲劳分析与优化[J]. 机械强度,2026,48(3):114-121. DOI: 10.16579/j.issn.1001.9669.2026.03.013.
LIU Lizhuang,DU Jian,LIU Zhilei,et al. Fatigue analysis and optimization of welds in the front frame of loaders based on multi-body dynamics and discrete element joint simulations[J]. Journal of Mechanical Strength,2026,48(3):114-121. DOI: 10.16579/j.issn.1001.9669.2026.03.013.
目的
2
为解决装载机前车架疲劳开裂问题,应用多体动力学-离散元联合仿真技术,基于等效结构应力法对前车架进行焊缝疲劳分析与结构优化。
方法
2
首先,在用户现场进行装载机V形铲装典型工况载荷谱采集试验,通过装载机多体动力学与离散元模型联合仿真技术,获得前车架各铰点动态虚拟载荷谱;然后,在前车架各铰点施加六通道单位载荷求解其应力场结果,与动态虚拟载荷谱进行叠加,进行等效结构应力法下的前车架焊缝疲劳仿真分析。仿真预测前车架有3处危险部位,与实际疲劳开裂部位一致,最后,对故障部位进行结构优化。
结果
2
结果表明,优化后车架疲劳寿命提升15.6倍,使用寿命在15 000 h以上,满足产品设计要求。
Objective
2
In order to solve the problem of fatigue cracking in the front frame of a loader
the joint simulation technology of multi-body dynamics and discrete element is applied to conduct weld fatigue analysis and structural optimization of the front frame based on the equivalent structural stress method.
Methods
2
Firstly
load spectrum collection tests were conducted for typical working conditions of V-shaped shovel loading on the user site
and the dynamic virtual load spectrums of each hinge point of that front frame were obtained. Then
six-channel unit load was applied to each hinge point of the front frame to solve the stress field results
which were superimposed with the dynamic virtual load spectrum.The fatigue simulation analysis of the front frame welds under the equivalent structural stress method was conducted. The simulation predicted three dangerous parts of the front frame
which were consistent with the after-sales fatigue cracking parts. Finally
the structural optimization of the faulty parts was carried out.
Results
2
The results show that fatigue life of the front frame after optimization is increased by 15.6 times compared to that before optimization
and the service life is over 15 000 hours
meeting the product design requirements.
姜涛 , 刘雄斌 , 周广萍 . 实测载荷驱动下挖掘机动臂的疲劳寿命研究 [J]. 中国工程机械学报 , 2014 , 12 ( 3 ): 268 - 272 .
JIANG Tao , LIU Xiongbin , ZHOU Guangping . Fatigue life study on excavator booms under actual loading [J]. Chinese Journal of Construction Machinery , 2014 , 12 ( 3 ): 268 - 272 . (In Chinese)
万一品 , 宋绪丁 , 员征文 . 装载机工作装置的疲劳试验及疲劳可靠性评估 [J]. 华南理工大学学报(自然科学版) , 2020 , 48 ( 8 ): 108 - 114 .
WAN Yipin , SONG Xuding , YUN Zhengwen . Fatigue test and fatigue reliability evaluation of loader working device [J]. Journal of South China University of Technology (Natural Science Edition) , 2020 , 48 ( 8 ): 108 - 114 . (In Chinese)
陈秉智 , 何正平 , 李向伟 , 等 . 某构件焊缝疲劳开裂的寿命预测方法应用对比 [J]. 焊接学报 , 2022 , 43 ( 5 ): 63 - 68 .
CHEN Bingzhi , HE Zhengping , LI Xiangwei , et al . Comparison of fatigue life predicting methods used in cracked welded component [J]. Transactions of the China Welding Institution , 2022 , 43 ( 5 ): 63 - 68 . (In Chinese)
张开林 . 基于热点应力法的转向架构架疲劳寿命工程评定方法 [J]. 机车电传动 , 2006 ( 5 ): 8 - 10 .
ZHANG Kailin . Engineering evaluation method of fatigue life for bogie frame based on hot spot stress method [J]. Electric Drive for Locomotives , 2006 ( 5 ): 8 - 10 . (In Chinese)
庞利叶 , 吕彭民 , 向清怡 , 等 . 基于热点应力法的液压挖掘机斗杆疲劳寿命评估 [J]. 制造业自动化 , 2019 , 41 ( 6 ): 8 - 11 .
PANG Liye , LÜ Pengmin , XIANG Qingyi , et al . Fatigue life evaluation of hydraulic excavator’s bucket rod based on hot spot stress method [J]. Manufacturing Automation , 2019 , 41 ( 6 ): 8 - 11 . (In Chinese)
张强 , 万久远 , 熊耀志 . 工程机械传动系疲劳试验程序载荷谱研究 [J]. 工程机械 , 2021 , 52 ( 1 ): 16 - 22 .
ZHANG Qiang , WAN Jiuyuan , XIONG Yaozhi . Research on load spectrum of fatigue test program for transmission system of construction machinery [J]. Construction Machinery and Equipment , 2021 , 52 ( 1 ): 16 - 22 . (In Chinese)
杜建 , 黄丽美 , 魏敏先 , 等 . 转向节多轴虚拟试验台架载荷谱应用研究 [J]. 机械强度 , 2023 , 45 ( 1 ): 198 - 208 .
DU Jian , HUANG Limei , WEI Minxian , et al . Application research on load spectrum of steering knuckle multi-axis virtual test bench [J]. Journal of Mechanical Strength , 2023 , 45 ( 1 ): 198 - 208 . (In Chinese)
杜建 , 于人杰 , 肖攀 , 等 . 载荷分析方法与下摆臂疲劳性能关系研究 [J]. 机械强度 , 2021 , 43 ( 4 ): 945 - 954 .
DU Jian , YU Renjie , XIAO Pan , et al . Research on the relationship between load analysis method and fatigue of lower control arm [J]. Journal of Mechanical Strength , 2021 , 43 ( 4 ): 945 - 954 . (In Chinese)
董国疆 , 王威 , 杜飞 , 等 . 虚拟迭代法转向节载荷谱提取与验证 [J]. 机械强度 , 2020 , 42 ( 6 ): 1323 - 1331 .
DONG Guojiang , WANG Wei , DU Fei , et al . Extraction and verification of load spectrum of steering knucle based on virtual iteration method [J]. Journal of Mechanical Strength , 2020 , 42 ( 6 ): 1323 - 1331 . (In Chinese)
王少杰 , 殷月 , 余圣锋 , 等 . 基于RecurDyn-EDEM的装载机耦合动力学仿真分析 [J]. 机械设计 , 2021 , 38 ( 11 ): 1 - 6 .
WANG Shaojie , YIN Yue , YU Shengfeng , et al . Dynamic analysis on loader coupling based on RecurDyn-EDEM [J]. Journal of Machine Design , 2021 , 38 ( 11 ): 1 - 6 . (In Chinese)
ASME Boiler , Pressure Vessel Committe . ASME boiler and pres-sure vessel code . Section Ⅷ,Rules for construction of pressure vessels [M]. New York : American Society of Mechanical Engineers , 2015 : 124 - 129 .
张欣 , 高世一 , 吴文兵 , 等 . 焊缝余高对焊接接头疲劳寿命影响的有限元分析 [J]. 热加工工艺 , 2017 , 46 ( 1 ): 189 - 194 .
ZHANG Xin , GAO Shiyi , WU Wenbing , et al . Finite element analysis of influence of weld reinforcement on fatigue life of welded joints [J]. Hot Working Technology , 2017 , 46 ( 1 ): 189 - 194 . (In Chinese)
邹艳妮 , 李耀 , 罗东 . 等效结构应力法在高强钢疲劳寿命预测中的应用 [J]. 机械科学与技术 , 2015 , 34 ( 8 ): 1298 - 1301 .
ZOU Yanni , LI Yao , LUO Dong . Application of equivalent stress method to fatigue life prediction of high-strength steel [J]. Mechanical Science and Technology for Aerospace Engineering , 2015 , 34 ( 8 ): 1298 - 1301 . (In Chinese)
刘亚良 , 孙屹博 , 邹丽 , 等 . 基于信息熵的铝合金焊接接头疲劳寿命分析方法 [J]. 焊接学报 , 2018 , 39 ( 4 ): 67 - 72 .
LIU Yaliang , SUN Yibo , ZOU Li , et al . Fatigue life analysis method of aluminum alloy welded joints based on information entropy [J]. Transactions of the China Welding Institution , 2018 , 39 ( 4 ): 67 - 72 . (In Chinese)
杜建 , 董国疆 , 韩杰 , 等 . 全浮式空气弹簧驾驶室焊接疲劳特性研究 [J]. 机械科学与技术 , 2025 , 44 ( 8 ): 1359 - 1370 .
DU Jian , DONG Guojiang , HAN Jie , et al . Study on welding fatigue characteristics of fully floating air spring cab [J]. Mechanical Science and Technololy for Aerospace Engineering , 2025 , 44 ( 8 ): 1359 - 1370 . (In Chinese)
佘玲娟 , 尹莉 , 钟懿 . 混凝土泵车高强钢臂架焊缝疲劳寿命预估 [J]. 中国工程机械学报 , 2019 , 17 ( 1 ): 29 - 33 .
SHE Lingjuan , YIN Li , ZHONG Yi . Fatigue life prediction of seam weld in the high strength steel boom structure of the concrete pump truck [J]. Chinese Journal of Construction Machinery , 2019 , 17 ( 1 ): 29 - 33 . (In Chinese)
ZHANG J , DONG P . Residual stresses in welded moment frames and implications for structural performance [J]. Journal of Structural Engineering , 2000 , 126 ( 3 ): 306 - 315 .
Guide for application of the mesh insensitive methodology:welded steel plates of ship and offshore structures:NT-3199:2012 [S]. Seine : Bureau Veritas , 2012 : 16 - 30 .
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