共查询到20条相似文献,搜索用时 171 毫秒
1.
文章探讨了车辆在上汽大众试车场与德国大众Ehra试车场进行道路试验时所承受的载荷关系。通过在测试车上安装六分力测量轮系统,分别采集两个试车场的道路载荷谱信号,依据疲劳损伤理论,对比了车辆在两个试车场中测得的载荷差异。同时分析了车辆在道路试验中所承受的载荷的影响因素,并提出了上汽大众试车场的交变耐久道路试验的优化方案。 相似文献
2.
基于等效试车原理,推导了两试车场试车规范的等效公式,据此提出了汽车可靠性道路试验规范制定中的计算流程.综合考虑车辆部件在x、y、z方向的受力和车身的扭转,选取了基准车辆前轴的轴头载荷作为等效的计算载荷,开发了某汽车公司面向欧洲和北美市场自主品牌乘用车的道路试验规范,最后对道路试验规范的制定提出了建议. 相似文献
3.
为了建设以车辆研发试验为目的的试车场,使我国的汽车工业走上自主研发的道路,文章介绍了国内外汽车产品研发的能力及产品研发过程,阐述了3种常规的试车场汽车研发试验道路,指出试车场的设计依据应建立在严格的车辆开发试验标准和试验方法上,同时加大试验和设计设施的建设及增加软硬件方面的投资. 相似文献
4.
通过调查摩托车实际道路使用条件,利用道路载荷采集仪器进行实际道路载荷谱的采集,分析与试车场道路载荷谱的相关性后,最终形成短周期的、可等效实际使用预期寿命的耐久性试验规范,并进行相应试验,从而达到缩短摩托车新产品开发周期,提高研发能力的目的。 相似文献
5.
6.
7.
8.
9.
结合实际开发需要,应用已有的试验车辆、试验设备和测量仪器,通过远程参数控制在六通道多轴模拟振动台(MAST)上实现了安装在车身内座椅总成的室内道路模拟试验技术,正确、快速地模拟试件在试车场强化道路上的振动特性,取得满意的试验结果。缩短了试验周期、降低了试验费用,提高了产品开发的成功率。 相似文献
10.
道路模拟试验方法,是一种先进的试验手段,被越来越广泛地应用于汽车零部件可靠性与耐久性研究。本文主要介绍如何利用道路模拟台进行汽车零部件道路模拟试验,并以国产斯太尔重型货车驾驶室为试验对象,简述了从试车场采集载荷谱、编辑载荷谱和台架振动模拟试验这一整个试验过程,指出了试验中应注意的问题。 相似文献
11.
The eight-channel test rig is widely used in durability assessment of vehicle components while for some cases of rear suspension,
this costly instrument is unnecessary. Based on the analysis of structure and forces, a simpler one-channel testing approach
is presented for the durability calculation of a dependent rear suspension. Taking a punched rear shock tower as the study
object, a FEA strain-stress analysis was first performed to determine the risk area. Then, the entire vehicle test system
was created, and the proving ground tests were carried out so that the real strain on the part could be measured. Based on
the road test data and the P-S-N curve of the component, the cumulative fatigue damage of a 15,000-kilometer proving ground
test road was calculated, and the computational result indicates that the modified structure was safe for durability analysis.
Moreover, a standard 50% S-N survival fraction curve was plotted using Corten and Dolan’s method, which can be utilized in
the durability analysis for other similar components. Finally, the road test for this modified suspension structure was carried
out, and the test result certified that the punched shock tower can be subjected to a 15,000-kilometer proving ground test
road without the appearance of fatigue failure. 相似文献
12.
Jiawei Yu Songlin Zheng Jinzhi Feng Lihui Zhao 《International Journal of Automotive Technology》2017,18(3):547-560
The generation of valid and effective test spectra from proving ground recorded load spectra is critical for automotive durability testing. Traditional methods mostly based on spectrum damage were used to select load spectra. Statistical characteristics of load spectra were taken into account, and a new load spectra determination method based on a concatenation of a multi-section minimum standard deviation spectrum (CMSD) was proposed. The CMSD spectra were created and based on proving ground recorded load spectra. Fatigue damage analyses showed that the CMSD spectra approximated the mean damage spectra and were representative of proving ground load spectra. Subsequently, the CMSD spectra were edited by applying the time correlated fatigue damage (TCFD) analysis method to generate accelerated loading spectra. The spectra editing process of the TCFD was discussed in detail. Validation of the accelerated spectra was conducted from amplitude and frequency domains. The same fatigue damage and identical spectrum properties were retained in the accelerated spectra. A vehicle 4-post testing was finally conducted where the accelerated loading spectra were applied as the target spectra. Several fatigue fracture phenomena occurred during our test, which showed good agreement with the field test. Therefore, the load spectra determination method CMSD associated with the load spectra editing method TCFD were demonstrated reasonable and practical. 相似文献
13.
14.
汽车前后轴台架疲劳试验与海南汽车试验场的疲劳寿命当量关系 总被引:2,自引:1,他引:2
以某轻型汽车后桥壳为例,运用工程疲劳寿命估算与道路模型疲劳试验相结合的方法,给出了该后桥壳基于海南汽车试验场可靠性试验的道路行驶载荷条件下所得到的疲劳寿命概率分布。 相似文献
15.
16.
汽车平顺性时域仿真分析 总被引:6,自引:0,他引:6
采用虚拟试验场技术进行了汽车行驶平顺性的时域仿真。建立了面向汽车平顺性分析的整车刚弹耦合有限元模型,同时建立了脉冲输入路面模型和随机输入路面模型。采用1/3倍频带分布加速度均方根值方法及总加权方法对试验车辆的平顺性进行了评价。试验结果表明,运用虚拟试验场技术能够真实地反映汽车的行驶平顺性,仿真分析结果可靠。 相似文献
17.
汽车试验场搓板路强化系数的研究 总被引:3,自引:2,他引:1
通过对试验车辆的疲劳寿命估算,利用道路强化系数计算方法,研究汽车试验场搓板路强化系数,为汽车可靠性强化道路试验规范的制定、验证和优化提供依据。采用有限元动态仿真技术模拟汽车在试验场搓板路的试验过程,仿真与试验结果进行对比验证,对应的特征参数基本一致。利用有限元仿真的结果对样车关键部件进行疲劳寿命分析和预测,求取试验场搓板路面的强化系数,并得到搓板路强化曲线。研究的结果应用于指导汽车路试规范的准确制定,减少试验的盲目性,增强试验的可信度,缩短研发周期和试验成本。 相似文献
18.
19.