Sideslip simulation and safe driving speed of truck on highway curve section(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2017年06期
- Page:
- 31-37
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Sideslip simulation and safe driving speed of truck on highway curve section
- Author(s):
- WANG Heng; XU Jin-liang; JIA Xing-li; SU Long
- 1. School of Highway, Chang’an University, Xi’an 710064, Shaanxi, China; 2. Zhejiang Communications Investment Group Co., Ld., Hangzhou 310000, Zhejiang, China; 3. Shaanxi Provincial Transport Planning Design and Research Institute, Xi’an 710082, Shaanxi, China
- Keywords:
- road engineering; highway curve section; sideslip simulation; rigid flexible coupling effect; dynamic response; critical speed
- PACS:
- U412.3
- DOI:
- -
- Abstract:
- To reveal the mechanism of sideslip accident of highway truck, the response state of driving input-road-vehicle in the case of sideslip was analyzed to find the truck sideslip safety criticality on curve section. As the data limit brought by the difficulties in field experiment, the whole truck model considering rigid flexible coupling effect was built by ADAMS according to truck’s balance condition on highway curve section. The non-measured curve pavement model and driver model were built based on 3D spline pavement and closed-loop control, then the driver-road-vehicle transient dynamic response model was established when sideslip happened. Also, the steering transient response under step input of steering wheel angle was used to evaluate the operation stability of truck, which verified the feasibility of simulation model. Referring to the actual value, the ADAMS sideslip simulation conditions were set up, such as road condition, vehicle condition, braking deceleration, and characteristic points of non-measured section, etc. According to the equal difference, a series of orthogonal sideslip simulation tests on 8 kinds of turning radius (400, 500, 600, 700, 800, 1 000, 1 500, 2 500 m), 8 kinds of super elevation (2%, 3%, 4%, 5%, 6%, 7%, 8%, 10%) and 3 kinds of pavement adhesion coefficients (0.2, 0.4, 0.6) were carried out, the simulation results revealed the sideslip trajectory change law of truck with different speeds and under different radii and different adhesion coefficients. Critical sideslip safe driving speed of characteristic points on curve section was obtained based on driving trajectory lateral offset. The results show that the truck driving trajectory lateral offset on highway curve section differs from each other obviously under different test conditions. The maximum is 2.456 m, and the minimum is 0.053 m. And critical sideslip safe driving speed of truck instant turning threshold on curve road section under different turning radius and pavement adhesion coefficients is between 47 to 97 km/h.
Last Update: 2017-12-18