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文章利用一个简单模型,分析了我国自主研发的桥梁柔性防撞装置的基本静力学性能.即分析研究了装置分别在平动、转动以及平动转动耦合时的结构响应.构建物理模型:两个刚性的椭圆型结构箱梁环绕在桥墩上,箱梁之间由均布弹簧圈支撑连接.研究表明:1)纯平动下,无量纲化弹性反力与平动方向不一致,可以分解为垂直方向上两个分力,分别与各自方向上的无量纲位移近似认为是线性关系,外力通过椭圆中心时需要外扭矩平衡装置,无量纲平衡扭矩与无量纲位移平方成正比;2)纯转动下,转角很小时,无量纲扭矩为转角的三次方函数.此外,文章还定性的分析了平动转动同时发生时的力学性能,即:平动对扭矩转角关系的影响、转动对力位移关系的影响.
In this paper, a simple model is used to analyze the basic statics of the flexible anti-collision device of bridge independently developed in our country, namely, the structural response of the device when it is coupled with translational motion, rotational motion and translational motion respectively.Constructing physical model: two The rigid oval-shaped box girder surrounds the bridge piers and the box girders are connected by uniform coil springs.The results show that: 1) The non-dimensional elastic reaction force and the non-dimensional elastic reaction force are not consistent under purely translational motion, and can be decomposed into vertical The two components in the direction, respectively, are approximately linearly related to the dimensionless displacements in their respective directions. An external torque balancing device is required when the external force passes through the center of the ellipse. The dimensionless equilibrium torque is proportional to the square of the dimensionless displacement. 2) Under purely rotating , And the dimensionless moment is the cubic function of the corner when the angle is small.Furthermore, the paper also qualitatively analyzes the mechanical properties when the translational motion occurs at the same time, ie, the influence of the translational motion on the torque rotation angle, the relationship between the rotational force and the displacement influences.