共查询到16条相似文献,搜索用时 171 毫秒
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本文综合应用结构有限元分析,疲劳寿命估算和室内道路模拟试验技术对某型汽车后桥壳的垂直弯曲疲劳强度进行了分析,评价。 相似文献
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T-car后桥台架疲劳试验研究 总被引:1,自引:1,他引:1
采用台架疲劳试验模拟了T-car后桥在道路试验中的受力状态。通过对T-car后桥进行的总成扭转试验、总成单侧侧向力试验和总成单侧纵向力试验,测得了各测点在疲劳循环中的应变幅、主应变幅度,并采用Coffin-M anson公式估算了寿命。试验表明,台架疲劳试验能反映路试时的疲劳损伤,根据T-car后桥用钢的应变疲劳性能估算得到的疲劳寿命与实际路试结果相符。 相似文献
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本文对EQ140型汽车后桥壳的疲劳寿命进行了研究。在试验中注意到系统惯性力的影响,改变了原载荷加载的试验方法,采用了应力加载的试验方法。利用成组试验法拟合了EQ140型汽车后桥壳的P—S—N曲线。同时还研究了载荷加载与应力加载两种方法在疲劳寿命上的差异。 相似文献
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通过对零件的台架试验受力状况进行CAE仿真,对影响后桥总成台架疲劳试验寿命的危险区域重点分析,控制和调整生产工艺参数,制造出合格的产品。试制的后桥总成成功通过疲劳台架试验和道路试验,满足各项技术要求。结构仿真与疲劳台架试验相结合加速了后桥开发、制造和功能验证流程。 相似文献
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汽车驱动桥是汽车的主要传力件和承载件,与从动桥共同支承车架及其上的各种重量。并承受由车轮传来的路面反作用力和力矩。驱动桥壳又是主减速器、差速器及驱动车轮传动装置的外壳,因而驱动桥壳应具有足够强度和刚度。这要求后桥在强度、刚度、韧性上有较高水平,因此对桥壳的疲劳寿命要求颇为严格,利用计算机辅助工程(CAE),可以对汽车关键零部件进行寿命预测,可大大缩短开发周期,又能节省大量试验费用。本文建立驱动桥壳有限元模 相似文献
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为解决PALIO后桥国产化过程中寿命达不到要求的问题,采用电测法测得了进口件和几种工艺条件下的国产件PALIO后桥在扭转台架疲劳试验中的主应变幅度。当取有效应变集中系数为1.3时,根据Coffin-Manson公式,运用PALIO后桥用钢的应变疲劳性能计算得到的疲劳寿命与实际台架疲劳寿命相符。 相似文献
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X. Wang W. Xu Y. Huang M. Zhong H. Fan 《International Journal of Automotive Technology》2012,13(6):923-932
This study seeks a practical method for simulating the vertical bending fatigue test of the BANJO housing of a five-link rear axle. Linear static and transient dynamic finite element models are constructed for the rear axle in which the rubber bushings and the bearings of the axle shafts are reasonably modeled with solid and shell elements, respectively, for simplicity. The calculated results are compared with the measured strain histories, and the results indicate that the finite element models constructed are reasonable. The hypothesis of equal fatigue damage is applied to determine the Hainan proving ground driving life prediction that is equivalent to the constant amplitude fatigue life in the vertical bending fatigue test. 相似文献
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L. H. Zhao S. L. Zheng J. Z. Feng H. F. Zhou Y. F. Xing 《International Journal of Automotive Technology》2014,15(5):843-852
Accurately predicting the fatigue life is the basis for the reliability and lightweight design of automobile parts. However, the predicted lives under service loadings on the basis of the S-N curve from constant amplitude loads from existing methods often seems conservative compared with real lives, because of ignoring the strengthening effect of loads below fatigue limit. In this paper, a fatigue damage model, which is modification of Miner’s Rule, was established for the fatigue assessment under service loadings by means of taking into account the strengthening and damaging effects of loads below fatigue limit. Then this model and conventional Miner’s Rule are applied to the estimate the fatigue life of a torsion beam rear axle using the loading history recorded on proving ground. Finally, verification tests are performed on MTS road load simulator test bed. Results of predicted lives and fatigue tests demonstrate that the accuracy of the predicted life could be greatly improved by taking into account the strengthening and damaging effect of loads below fatigue limit. 相似文献
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EQ140汽车后桥的极值载荷分析及在疲劳试验中的应用 总被引:1,自引:0,他引:1
本文对汽车后桥的极值载荷进行了深入的分析,得出了确定最短测量里程和估算载荷谱极值载荷的方法,用此方法推断了三种典型载荷谱的极值载荷,建立了三种单一路面的程序疲劳试验者,进行了室内程序疲劳试验,得到了代表各种种面等级的极值载荷和使用寿命的统计关系。 相似文献
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本文用三种单一路面载荷谱对EQ140汽车驱动桥壳进行了强化程序疲劳试验,并对疲劳断口进行了宏观和微观分析,从而找出了它的破坏机理的原因,并提出了改善EQ140汽车驱动桥壳疲劳强度的措施。 相似文献
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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