Failure mechanism of rearview mirror of semitrailer train rightturn(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2020年2期
- Page:
- 117-126
- Research Field:
- 汽车与机械工程
- Publishing date:
Info
- Title:
- Failure mechanism of rearview mirror of semitrailer train rightturn
- Author(s):
- WANG Qingzhou; WANG Nannan; HUANG Yuman; LUAN Haimin
- （School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China）
- Keywords:
- traffic engineering; traffic safety; rearview mirror of semitrailer rightturn; inner wheel difference; blind area of right rearview mirror vision
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to study the failure mechanism of semitrailer train rearview mirror during rightturn, the formation process and interactive relationship of the blind area of trajectory and the blind spot of right rearview mirror were researched based on the actual vehicle test. The semitrailer train rightturn inner wheel difference model was established by introducing virtual axis with calculation of its correction parameters. The relationship between blind area of rightturn trajectory and turning angle was determined. The maximum width of rightturn blind area was obtained as the minimum safe distance for semitrailer train rightturn. The trajectory formation process was verified by adaptation of rightturn the actual vehicle test. The relationship model of right rearview mirror visual vehicle length and semitrailer train turning angle in the rightturning process was established. Meanwhile, the interrelationship between trajectory blind area and turning angle field blind area was obtained. The evaluation index system of right rearview mirror visual vehicle length and accident risk degree was established through the statistical analysis of collision positions in semitrailer train rightturn accidents, combining with the blind area range and visual length, the effective blind replacement system was also proposed. The results show that the model of rightturn inner wheel difference of semitrailer train is optimized by introducing virtual axis, and correction parameter is 0.8. The blind area of inner wheel difference increases with increase of the angle between tractor and trailer during semitrailer train rightturn process at road intersection. While the angle between tractor and trailer is larger than 28.8°, the visible length of trailers right rearview mirror reaches trailer rear edge. Afterward, the visual field of right rearview mirror gradually enters the blind area of inner wheel difference. While the angle between tractor and trailer reaches 63.44°, the radial width of blind area of inner wheel difference reaches the maximum, which is approximately 4.4 m, and the vehicle visual length is only 3.22 m. In the process of vehicle turning right, when the vehicle visual length is less than 2L/5, where L is the actually vehicle visual length， the maximum risk coefficient is 0.7. If normal driving was maintained, the angle of right rearview mirror to fill the blindness is 41°. The combination of rearview mirror and camera can effectively reduce the rearview mirror blind area and traffic accident rate. 3 tabs, 12 figs, 31 refs.
Last Update: 2020-04-09