将轮胎与路面之间的面接触引入车-桥耦合模型基础上,进一步考虑车辆的横向自由度,提出一种新的车辆模型研究移动车载作用下桥梁的横向振动.将车辆轮胎模拟成一个三维弹簧模型,轮胎与地面的接触面模拟成长方形,通过接触面间的位移协调条件和力相互作用建立车-桥耦合振动方程.考虑影响接触面间横向力大小的三种重要参数如:滑移角、侧偏角、轮胎“S”形运动对耦合系统的影响；并与炉坪大桥实测数据比较,验证该方法的正确性,并分析接触面积、车速等对横向振动的影响.%Here, a new model considering a bridge's lateral vibration induced by moving vehicles was established. A vehicle type was modeled as a three-dimensional elementary spring model, and a contact patch was assumed to be a rectangle. Three significant factors affecting lateral forces including slip angle, camber angle, and vehicle tyres moving with "S" shape were introduced in studying the effect of lateral forces on lateral vibration of bridges. The bridge-vehicle coupled equations were established by combining the equations of motion of both a bridge and a vehicle using the displacement relationship and interaction force relationship at the patch contact. The accuracy and efficiency of the proposed method were verified by comparing simulations and field test results of a typical high-pier bridge. It was shown that the proposed method can rationally simulate the lateral vibration of a bridge under moving vehicular loads.
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