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基于风-车-桥耦合系统振动理论,建立风-车-桥耦合系统的运动方程。运用自编风-车-桥耦合程序,计算不同路面、不同车速和不同风速下车轮竖向接触力,分析路面等级、车速和风速对车辆行驶安全性的影响;以车轮折算压力为标准,采用概率统计方法建立车辆侧滑和侧倾事故模型,提高事故分析的可靠性,并结合工程实例,对风环境下车辆的动力响应进行了分析。计算了车辆行驶在不同车速下侧倾临界风速、不同风速下侧倾临界车速和4种不同路面状况下侧滑临界风速,为车辆在桥上行驶安全风速和车速确定提供依据。
Based on the vibration theory of wind - vehicle - bridge coupling system, the equation of motion of wind - vehicle - bridge coupling system is established. The self-made wind-vehicle-bridge coupling program is used to calculate the vertical contact force of the wheel under different road conditions, different vehicle speeds and different wind speeds. The influence of the road surface grade, vehicle speed and wind speed on the driving safety of the vehicle is analyzed. Using the converted pressure of the wheels as the standard, Probabilistic and statistical methods to establish the model of vehicle skidding and roll accidents to improve the reliability of accident analysis. Combined with engineering examples, the dynamic response of vehicles under wind environment was analyzed. The critical rolling speed at different vehicle speeds, the critical rolling speed at different wind speeds and the critical wind speed at four different road conditions are calculated to provide basis for the safe driving speed and vehicle speed on the bridge.