Analysis Of Safety And Comfort Of Bridges In Typhoon Area

With the rapid development of China's economy,the quality of life of the people has been continuously improved,and transportation has become very convenient.As a typical representative of the sea bridge,the convenience of people's travel has been greatly improved.Most of the cross-sea bridges are built near coastal cities,and these areas are often affected by typhoon weather,and the number of traffic accidents caused by typhoon weather has risen significantly.Under the strong wind,it is of great significance to ensure the safe driving of the car.In response to the appeal issue,in order to ensure the safety and comfort of the typhoon area,this paper conducted 'an in-depth analysis of the typhoon bridge traffic.First of all,in most literature studies,scholars usually set the crosswind angle to 90° by default,but in the actual driving process,the crosswind angle is not perpendicular to the car body,so the 90 ° crosswind angle is adopted.Setting the worst conditions is not the case.Therefore,this paper will set different crosswind angles for aerodynamic characteristics and stability analysis,summarize the variation law of pneumatic six-component force and obtain the worst crosswind angle,and provide theoretical basis for the later research.Secondly,the wind tunnel test is carried out on the axle model,and the vehicle model and bridge deck model with the reduction ratio are set,and the wind tunnel test is carried out to compare the wind tunnel test results with the simulation results.Different types of wind barriers are proposed to conduct wind tunnel tests.According to the test results,the influence law of wind barriers on the aerodynamic six-component force of the vehicle is summarized,and the reasons for the influence are explained in principle.Furthermore,the research on the safety of the wind-vehicle-human system is carried out.Firstly,the evaluation criteria of the vehicle safety are proposed,including the side slip accident,the side-off accident and the evaluation index of the yaw accident.A closed-loop system of wind-vehicle-human is constructed.According to the principle of single variable,the wind speed of the crosswind is first ensured.The simulation analysis is carried out by setting different driving speeds,and the safety is evaluated.Then ensure that the speed of the vehicle does not change,and change the crosswind wind speed for simulation and analysis.Comprehensive analysis,summarizing the extreme speed and wind speed that the safety of the car will be affected.Combining different road roughness conditions,research on the more difficult driving environment,analyze the impact of road conditions on driving safety,and propose driving recommendations for safe driving according to different road conditions.Finally,combined with the windshield model of the previous part,the change of driving safety of the car after installing the wind barrier is studied.Finally,the comfort of the wind-vehicle-human system was studied and analyzed Firstly,the evaluation criteria and evaluation indexes of human comfort are put forward.According to the same side wind speed,different driving speeds,the same driving speed and different crosswind wind speeds,the crosswind wind speed and driving affecting human comfort are explored.Speed.Then combined with the wind barrier model,after the wind barrier is installed,the impact on the driving comfort is studied.Finally,the influence law of the wind-vehicle-human system's driving comfort is summarized,and suggestions for comfortable driving are put forward to ensure that the driver can drive the car in a comfortable environment.