汽车工程 ›› 2021, Vol. 43 ›› Issue (10): 1555-1564.doi: 10.19562/j.chinasae.qcgc.2021.10.019
• • 上一篇
收稿日期:
2021-04-07
修回日期:
2021-05-20
出版日期:
2021-10-25
发布日期:
2021-10-25
通讯作者:
程稳正
E-mail:wenzheng.cheng@geely.com
Wenzheng Cheng(),Xiaoqiao Yu,Xia Xiao,Yuanming Dong,Jie Hou
Received:
2021-04-07
Revised:
2021-05-20
Online:
2021-10-25
Published:
2021-10-25
Contact:
Wenzheng Cheng
E-mail:wenzheng.cheng@geely.com
摘要:
针对装有五连杆后悬架的后副车架零部件级台架疲劳试验由于液压作动器相互干涉,难以布置而无法进行的问题,提出一种基于应力张量分析的疲劳试验方法。它根据危险点应力状态,识别出关键载荷通道,对于两个潜在风险点,分别定义了简单可实施的块谱载荷。设计的试验方案,危险点主应力方向基本不变,损伤与原始路谱接近,试验结论与后悬架系统试验一致,降低了试验成本和开发风险。
程稳正,余小巧,肖厦,董远明,侯杰. 基于应力张量分析的后副车架疲劳试验[J]. 汽车工程, 2021, 43(10): 1555-1564.
Wenzheng Cheng,Xiaoqiao Yu,Xia Xiao,Yuanming Dong,Jie Hou. The Fatigue Test of Rear Sub⁃frame Based on Stress Tensor Analysis[J]. Automotive Engineering, 2021, 43(10): 1555-1564.
表3
危险点1通道应力分量"
通道名称 | S11/MPa | S22/MPa | S12/MPa |
---|---|---|---|
Ch1 | -6.07E?03 | -2.71E?03 | 3.60E?03 |
Ch2 | 4.39E?04 | -5.37E?04 | 1.50E?05 |
Ch3 | 2.14E?03 | 1.85E?03 | -1.62E?03 |
Ch4 | 1.28E?03 | 2.76E?04 | -6.46E?04 |
Ch5 | 1.83E?04 | 3.01E?04 | -1.74E?04 |
Ch6 | 2.19E?03 | 5.59E?04 | -1.15E?03 |
Ch7 | -8.27E?04 | -1.52E?04 | 4.09E?04 |
Ch8 | -1.01E?04 | -1.29E?04 | 9.55E?05 |
Ch9 | -4.66E?04 | 2.23E?04 | 1.18E?04 |
Ch10 | 8.66E?04 | 7.04E?05 | -3.99E?04 |
表5
S11应力分量通道比例"
序号 | 时刻/ s | Ch1 | Ch2 | Ch3 | Ch4 | Ch5 | Ch6 | Ch7 | Ch8 | Ch9 | Ch10 |
---|---|---|---|---|---|---|---|---|---|---|---|
1 | 1.784 | 56.22% | -4.03% | 12.92% | 8.32% | 1.30% | 18.44% | 5.87% | 0.89% | -0.01% | 0.05% |
2 | 3.042 | 53.96% | -5.08% | 9.73% | 3.69% | 0.58% | 35.36% | 1.83% | 0.79% | 0.65% | -1.48% |
3 | 8.332 | 78.13% | -2.70% | 9.53% | 4.72% | 2.62% | 1.82% | 6.79% | 0.06% | 0.57% | -1.51% |
4 | 8.744 | 69.20% | -3.72% | 10.66% | 4.59% | 2.04% | 11.74% | 6.37% | 0.29% | 0.11% | -1.26% |
5 | 8.874 | 64.29% | -4.83% | 8.24% | 5.41% | 1.93% | 20.30% | 4.45% | 0.54% | 0.75% | -1.09% |
6 | 9.026 | 59.50% | -5.32% | 8.91% | 5.95% | 1.70% | 24.36% | 4.57% | 0.66% | 0.70% | -0.97% |
7 | 3.526 | 61.34% | -4.41% | 7.97% | 5.42% | 2.23% | 17.05% | 8.58% | 0.91% | -0.90% | 1.87% |
8 | 9.318 | 61.32% | -3.02% | 8.88% | 2.80% | 1.77% | 18.94% | 6.97% | 0.79% | -0.35% | 1.94% |
表6
S22应力分量通道比例"
序号 | 时刻/ s | Ch1 | Ch2 | Ch3 | Ch4 | Ch5 | Ch6 | Ch7 | Ch8 | Ch9 | Ch10 |
---|---|---|---|---|---|---|---|---|---|---|---|
1 | 1.784 | 48.16% | 9.49% | 21.45% | 3.44% | 4.08% | 9.05% | 2.07% | 2.19% | 0.00% | 0.01% |
2 | 3.042 | 47.80% | 12.35% | 16.71% | 1.57% | 1.89% | 17.93% | 0.67% | 2.01% | -0.63% | -0.25% |
3 | 8.332 | 65.58% | 6.22% | 15.51% | 1.92% | 8.12% | 0.88% | 2.34% | 0.15% | -0.52% | -0.24% |
4 | 8.744 | 57.84% | 8.53% | 17.27% | 1.86% | 6.30% | 5.62% | 2.20% | 0.70% | -0.09% | -0.19% |
5 | 8.874 | 54.79% | 11.30% | 13.61% | 2.22% | 6.07% | 9.93% | 1.57% | 1.32% | -0.69% | -0.16% |
6 | 9.026 | 50.69% | 12.45% | 14.72% | 2.45% | 5.35% | 11.87% | 1.60% | 1.62% | -0.64% | -0.15% |
7 | 3.526 | 52.46% | 10.37% | 13.21% | 2.23% | 7.02% | 8.35% | 3.02% | 2.23% | 0.83% | 0.29% |
8 | 9.318 | 55.09% | 7.44% | 15.46% | 1.21% | 5.84% | 9.73% | 2.57% | 2.04% | 0.34% | 0.31% |
表7
S12应力分量通道比例"
序号 | 时刻/ s | Ch1 | Ch2 | Ch3 | Ch4 | Ch5 | Ch6 | Ch7 | Ch8 | Ch9 | Ch10 |
---|---|---|---|---|---|---|---|---|---|---|---|
1 | 1.784 | 53.66% | 0.22% | 15.70% | 6.77% | 1.98% | 15.61% | 4.67% | 1.36% | 0.00% | 0.03% |
2 | 3.042 | 51.87% | 0.28% | 11.92% | 3.01% | 0.89% | 30.14% | 1.47% | 1.22% | 0.27% | -1.11% |
3 | 8.332 | 74.35% | 0.14% | 11.55% | 3.81% | 4.00% | 1.54% | 5.38% | 0.09% | 0.24% | -1.11% |
4 | 8.744 | 65.68% | 0.21% | 12.89% | 3.71% | 3.10% | 9.87% | 5.04% | 0.43% | 0.05% | -0.93% |
5 | 8.874 | 61.30% | 0.27% | 10.00% | 4.39% | 2.95% | 17.19% | 3.53% | 0.82% | 0.31% | -0.81% |
6 | 9.026 | 56.71% | 0.30% | 10.82% | 4.82% | 2.60% | 20.57% | 3.63% | 1.01% | 0.28% | -0.72% |
7 | 3.526 | 58.59% | 0.24% | 9.69% | 4.41% | 3.41% | 14.44% | 6.82% | 1.39% | -0.37% | 1.39% |
8 | 9.318 | 59.42% | 0.17% | 10.96% | 2.31% | 2.75% | 16.25% | 5.63% | 1.23% | -0.15% | 1.46% |
表11
危险点1时刻范围值"
序号 | 时刻/s | Ch1/N | Ch3/N | Ch6/N | 应力范围/MPa | 应力百分比/% |
---|---|---|---|---|---|---|
1 | 1.784 | 25 740 | 16 748 | 23 420 | 396.21 | 99.80 |
2 | 3.042 | 18 480 | 9 438 | 33 580 | 294.42 | 74.16 |
3 | 8.332 | 26 320 | 9 096 | 1 704 | 291.28 | 73.37 |
4 | 8.744 | 22 740 | 9 922 | 10 690 | 286.00 | 72.04 |
5 | 8.874 | 22 760 | 8 260 | 19 958 | 306.60 | 77.23 |
6 | 9.026 | 22 220 | 9 428 | 25 200 | 323.59 | 81.51 |
7 | 3.526 | 20 160 | 7 420 | 15 530 | 284.41 | 71.64 |
8 | 9.318 | 28 500 | 11 686 | 24 360 | 397.00 | 100.00 |
表14
危险点2时刻范围值"
序号 | 时刻/s | Ch1/N | Ch2/N | Ch4/N | 应力范围/MPa | 应力百分比/% |
---|---|---|---|---|---|---|
1 | 1.784 | 25 740 | 25 540 | 18 060 | 347.22 | 112.00 |
2 | 2.870 | 15 396 | 24 380 | 6 048 | 288.58 | 93.09 |
3 | 8.074 | 29 220 | 16 340 | 9 880 | 264.62 | 85.36 |
4 | 8.874 | 22 760 | 23 640 | 9 080 | 286.52 | 92.43 |
5 | 9.026 | 22 220 | 27 480 | 10 528 | 319.24 | 102.98 |
6 | 9.104 | 19 774 | 22 360 | 7 526 | 259.54 | 83.72 |
7 | 3.508 | 19 508 | 21 380 | 9 098 | 203.00 | 65.48 |
8 | 9.316 | 28 520 | 19 406 | 6 202 | 261.98 | 84.51 |
9 | 9.770 | 17 008 | 14 266 | 5 560 | 183.98 | 59.35 |
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