3D数字路面底盘构件载荷分解研究

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (17) : 213-221.

论文

3D数字路面底盘构件载荷分解研究

董国疆1,2，王威1，杜飞1，韩用1

作者信息 +

Load decomposition of vehicle chassis components based on 3D digital road

DONG Guojiang1,2, WANG Wei1, DU Fei1, HAN Yong1

Author information +

文章历史 +

摘要

汽车底盘零部件载荷谱是分析构件疲劳性能的关键要素。传统采用虚拟迭代提取载荷谱的方法存在研发周期长、成本高等缺点。基于此，采集了试验场典型强化路不平度的高程数据，建立3D数字路面模型，开展了试验场典型强化道路试验，得到实车轮心六分力、悬架和车身关键点监测信号；基于ADAMS/CAR建立整车刚柔耦合多体动力学模型，并通过室内台架试验依次对整车模型和轮胎模型进行校验；采用3D数字路面法和虚拟迭代法开展整车多体动力学仿真，并将仿真数据与实车测试信号从时域、频域、RMS值、伪损伤比和穿级计数等数据统计角度分析对比。结果表明，基于3D数字路面仿真数据精度略低于虚拟迭代法，但两种方法在各典型路面工况下监测信号时域和频域曲线整体趋势基本一致，RMS值相对误差在30%以内，伪损伤比值均介于065~170，可满足后续疲劳分析的精度要求；3D数字路面仿真能够较为准确的反映强化路载荷工况，在零部件研发初期可进一步提高效率，降低成本。

Abstract

The load spectrum of car chassis components is the key factor to analyze components’ fatigue performance.The traditional extracting load spectrum method with the virtual iteration has disadvantages of long development period and high cost.Here, the elevation data of typical reinforced road surface roughness in test field were collected to establish a 3D digital road model, and the test field’s typical reinforced road tests were conducted.Monitoring signals of a real car wheel center force’s six components, suspension and car body key points were obtained.Based on the software ADAMS/CAR, the rigid-flexible coupled multi-body dynamic model of the whole vehicle was established, and the obtained whole vehicle model and tire model were verified using indoor bench tests.The 3D digital road method and the virtual iteration method were used to perform the whole vehicle multi-body dynamic simulation, and the simulation data and real vehicle testing signals were analyzed contrastively from data statistics angles of time domain, frequency domain, RMS value, pseudo damage ratio and penetration count.The results showed that the accuracy of simulation data based on 3D digital road is slightly lower than that based on virtual iterative method, but overall trends of time domain and frequency domain curves of monitoring signals obtained using the two methods are basically the same under various typical road surface conditions; the relative error of RMS value is less than 30%, and the pseudo damage ratio is within the range of 0.65-1.70 to meet accuracy requirements of subsequent fatigue analysis; 3D digital road simulation can reflect load condition of reinforced road surface more accurately, and further improve efficiency and reduce cost in initial stage of car parts development.

导出引用

董国疆，王威，杜飞，韩用. 3D数字路面底盘构件载荷分解研究[J]. 振动与冲击, 2021, 40(17): 213-221

DONG Guojiang, WANG Wei, DU Fei, HAN Yong. Load decomposition of vehicle chassis components based on 3D digital road[J]. Journal of Vibration and Shock, 2021, 40(17): 213-221

参考文献

［1］CRUZ J M D, LIMA D E S I, OLIVERIRA A A D.A semi-analytical method to generate load cases for CAE durability using virtual vehicle protoypes［R］.SAE Paper, 2003-01-3667.［2］刘俊, 刘亚军, 张少辉, 等.基于虚拟迭代及有限元理论的某中型货车驾驶室疲劳寿命研究［J］.中国机械工程, 2018, 29(13): 1588-1595.
LIU Jun, LIU Yajun, ZHANG Shaohui, et al.Fatigue analysis of a medium truck cab based on virtual iteration and finite element theory［J］.China Mechanical Engineering, 2018, 29(13): 1588-1595.
［3］RYU S.A study on obtaining excitation load of virtual test lab using virtual iteration method［R］.SAE Paper, 2010-01-0011.
［4］刘永臣, 王国林, 孙丽, 等.面向用户的汽车道路谱重构方法［J］.中国机械工程, 2014, 25(15): 2112-2116.
LIU Yongchen, WANG Guolin, SUN Li, et al.Reconstruction methods of vehicle road spectrum faced users ［J］.China Mechanical Engineering, 2014, 25(15): 2112-2116.
［5］HONG H J, STRUMPFER S D.Virtual road load data acquisition for twist axle rear suspension［R］.SAE Paper, 2011-01-0026.
［6］ZHOU Y, ZHANG S, LI F.Compared vehicle body fatigue analysis based on VPG and experimental road load data［C］∥Proceedings of SAE—China Congress.Shanghai, 2015.
［7］孙成智, 段向雷, 翁洋, 等.基于3D数字路面的整车耐久性能评价方法研究［J］.汽车工程, 2017, 39(10): 1211-1216.
SUN Chengzhi, DUAN Xianglei, WENG Yang, et al.A study on the evaluation method of vehicle durability performance based on 3D digital road［J］.Automotive Engineering, 2017, 39(10): 1211-1216.
［8］荣兵, 肖攀, 周建文.基于实测载荷谱和仿真载荷谱的底盘疲劳分析及对比［J］.振动与冲击, 2018, 37(12): 179-186.
RONG Bing, XIAO Pan, ZHOU Jianwen.A fatigue comparative analysis of chassis based on simulated road load spectrum and measured road load spectrum［J］.Journal of Vibration and Shock, 2018, 37(12): 179-186.
［9］WANG M L, LIU X T, WANG X L, et al.Research on load-spectrum construction of automobile key parts based on Monte Carlo sampling［J］.Journal of Testing & Evaluation, 2017, 46(3): 2016-02-96.
［10］严金霞, 张开斌, 谢飞, 等.基于ADAMS的非平直路面模型的重构与验证［J］.汽车工程, 2011, 33(11): 985-989.
YAN Jinxia, ZHANG Kaibin, XIE Fei, et al.Reconstruction and validation of non-straight road model based on ADAMS［J］.Automotive Engineering, 2011, 33(11): 985-989.
［11］荣兵, 肖攀, 周建文, 等.某试验场强化路三维虚拟路面重构与对比分析［J］.汽车工程, 2017, 39(2): 214-219.
RONG Bing, XIAO Pan, ZHOU Jianwen.Reconstruction and comparative analysis on 3D virtual intensified road in a proving ground［J］.Automotive Engineering, 2017, 39(2): 214-219.
［12］BARSI A, POTO V, TIHANYI V.Creating OpenCRG road surface model from terrestrial laser scanning data for autonomous vehicles［M］∥Vehicle and Automotive Engineering.Berlin: Springer, 2018.
［13］陈军.MSC.ADAMS技术与工程分析实例［M］.北京: 中国水利水电出版社, 2008.
［14］谢润.车载武器行进间发射动力学研究［D］.南京: 南京理工大学, 2015.
［15］石晓辉, 何洋, 李文礼, 等.基于虚拟试车场的变速器载荷模拟［J］.重庆理工大学学报(自然科学), 2019, 33(1): 7-15.
SHI Xiaohui, HE Yang, LI Wenli, et al.The load simulation of transmission based on virtual proving ground［J］.Journal of Chongqing University of Technology (Natural Science), 2019, 33(1): 7-15.
［16］严金霞.基于ADAMS的三维虚拟道路的重构及其平顺性仿真分析［D］.镇江：江苏大学, 2010.
［17］方剑光, 高云凯, 徐成民.车身疲劳载荷谱的位移反求法［J］.同济大学学报, 2013, 41(6): 895-899.
FANG Jianguang, GAO Yunkai, XU Chengmin.Displacement back-calculation of body fatigue loading spectrum［J］.Journal of Tongji University (Natural Science), 2013, 41(6): 895-899.
［18］陈栋华, 靳晓雄, 周鋐, 等.轿车底盘零部件耐久性虚拟试验方法研究［J］.汽车工程, 2007, 29(11): 998-1001.
CHEN Donghua, JIN Xiaoxiong, ZHOU Hong, et al.A study on virtual durability test method for car chassis components［J］.Automotive Engineering, 2007, 29(11): 998-1001.
［19］CIANETTI F, ALVINO A, BOLOGNINI A, et al.The design of durability tests by fatigue damage spectrum approach［J］.Fatigue & Fracture of Engineering Materials & Structures, 2017 (Special Issue 1): 1-10.
［20］YANG Xiaojun, LI Jun.Reaserch on the method of selecting iterative target signal for six channels test［J］.Mechanical Engineering Technology, 2016, 5(2): 182-194.
［21］曹正林, 李骏, 郭孔辉.基于虚拟试车场的轿车悬架耐久性强化试验仿真研究［J］.机械工程学报, 2012, 48(10): 122-127.
CAO Zhenglin, LI Jun, GUO Konghui.Research on passenger car suspension durability using virtual proving ground［J］.Journal of Mechanical Engineering, 2012, 48(10): 122-127.［22］吴道俊.客车道路载荷谱分析与疲劳编辑研究［J］.农业装备与车辆工程, 2016(3): 49-54.
WU Daojun.Research on analysis and fatigue editing of bus road load spectrum［J］.Agricultural Equipment & Vehicle Engineering, 2016(3): 49-54.