Road horizontal curve radius design scheme security assessment method based on virtual vehicle rollover and sideslip tests

Abstract

The invention discloses a road horizontal curve radius design scheme security assessment method based on virtual vehicle rollover and sideslip tests. The method comprises the following steps of defining a control function used for assessing a target road; constructing a driver- heavy truck-target road virtual test simulation platform by using adams / car; acquiring a dynamic index of the heavy truck running on the target road at a designed speed v according to the virtual test simulation platform, and computing values of LTAr and LTRr; and judging whether the computed values of LTAr and LTRr meets the requirements of a control function F(r). According to the method provided by the invention, the moving state of the vehicle passing through a curve can be more accurately acquired, and an assessment result is acquired by rapid quantitative computation; the method can be applied to the roads in various stages, thus being wide in application range; by using the method to road horizontal curves in design and construction stages, dependency on real operation data of the roads can be avoided.

Description

technical field [0001] The invention relates to the fields of road flat curve radius design, road safety research and simulation, in particular to a safety evaluation method for a road flat curve radius design scheme based on a vehicle rollover and sideslip virtual test. Background technique [0002] Rollover and skidding occupy an important proportion in all types of traffic accidents, and are likely to cause large personnel and economic losses. According to NHTSA statistics, the incidence rate of vehicle rollover is about 5%, but the death rate caused by rollover accidents is as high as 30%. Under normal driving conditions, the unreasonable road alignment, especially the small curve radius is the main cause of vehicle rollover and sideslip accidents, and it is also the most controllable factor. Therefore, whether the curve radius meets the safety standard is a very important aspect when evaluating road safety. [0003] Scholars at home and abroad have carried out differe...

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Problems solved by technology

[0003] Scholars at home and abroad have carried out different degrees of research on the safety evaluation of flat curves of highways. In terms of evaluation methods, they mainly focus on mathematical statistics analysis and calculation of traffic accidents, real vehicle tests, and review methods of design specifications. Among them, mathematical statistics of traffic accidents The two safety evaluation methods of analysis and calculation and actual vehicle test are only applicable to highways in the operation stage; while the design specification review method is based on the vehicle operating speed model, and the reliability of the evaluation results depends entirely on the accuracy of the vehicle operating speed prediction model , and the evaluation process only focuses on theoretical demonstrations, ignoring other realistic factors such as the interaction between drivers, vehicles, and roads

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