CAJ | 학술논문

以中间带弹性支撑连续梁桥为研究对象，车辆简化为两自由度车辆移动系统，桥面不平度功率谱密度作为输入，建立了车-弹性支撑连续梁桥的耦合力学分析模型。采用转换矩阵法获取连续梁桥的模态函数，结合状态空间理论和演变随机过程一般理论，给出了整个耦合系统演变随机响应的分析方法，并结合数值算列，探讨了跨中支座条件、桥梁截面抗弯刚度、弹性支撑位置、车辆运行速度及桥面平整度对车桥耦合系统随机响应的影响。
이중간대탄성지탱련속량교위연구대상，차량간화위량자유도차량이동계통，교면불평도공솔보밀도작위수입，건립료차-탄성지탱련속량교적우합역학분석모형。채용전환구진법획취련속량교적모태함수，결합상태공간이론화연변수궤과정일반이론，급출료정개우합계통연변수궤향응적분석방법，병결합수치산렬，탐토료과중지좌조건、교량절면항만강도、탄성지탱위치、차량운행속도급교면평정도대차교우합계통수궤향응적영향。
The random vibration of a coupled vehicle-bridge system under moving vehicular loads was studied.The bridge and vehicle were modeled as a continuous beam with elastic bearings,and a 2-DOF system with linear suspensions and tire flexibility,respectively.The power spectral density of the bridge surface irregularity was taken as an input.Modes of the continuous beam were obtained with the transfer matrix method.According to the state space theory and general theory of evolutionary random processes,the analysis method for the random response of the coupled system was derived.The effects of conditions of mid-support,bending stiffness of bridge cross-section,location of elastic bearings,vehicle velocity, and bridge surface roughness on the random response of the coupled vehicle-bridge system were discussed.