Simulation analysis of multi angle collision of super high-speed car on bridge guardrail

The protective effect of highway guardrails on vehicles is closely related to collision speed and collision angle. With the development of road traffic, it is possible to construct super high-speed highways. When super high-speed vehicles collide with guardrails at different angles, the protective effect of guardrails will vary. In order to analyze the guardrail protection effect during vehicle collision with guardrails, a numerical simulation method was used to model and analyze the guardrail collision process of the super high-speed car, taking into account the impact of different collision angles of the car. The main conclusions are as follows:(1) During the collision of the super high-speed car with guardrails at different angles, the cars did not cross, break through, or ride over the guardrails. The car's wheel tracks were all within the range of the guided exit frame, and the guiding and buffering functions of the guardrail structure met the requirements. As the collision angle between the vehicle and the guardrail continues to increase, the vehicle's wheel track becomes closer to the long side of the guiding exit frame away from the guardrail. As the collision angle increases, the guiding function of the guardrail on the vehicle decreases. (2) As the collision angle between the vehicle and the guardrail increases, the buffering effect of the guardrail on the vehicle decreases, and the risk of passenger injury increases. When the collision angle between the vehicle and the guardrail is 30°, the collision speed and acceleration of the passengers exceed the standard requirements. (3) As the collision angle of vehicles increases, the collision force between cars and guardrails increases, and the collision load acting on the guardrail structure increases. Under larger loads, the deformation of the guardrail structure increases, and the risk of car collision with guardrails increases.