CAJ | 학술논문

把车辆和桥梁结构看成相互作用的两个子系统，分别建立二者的力学模型和振动微分方程。在求解过程中，通过位移协调条件和两个子系统间相互作用力相等的原则把两个子系统的振动微分方程耦合起来。利用有限元分析软件 ANYSYS 的二次开发语言 APDL 编写了求解车桥系统耦合振动微分方程的迭代计算命令流。以桥面不平顺为激振源，分析了主跨为550 m 的福建长门大桥当多车辆通过时在各级桥面不平顺情况下的动力响应。计算结果表明，随着桥面不平顺程度的增加，桥梁结构和车体的动力响应均呈非线性增大，其中桥梁主跨跨中位移、主跨最外侧拉索应力和车辆加速度变化显著。
파차량화교량결구간성상호작용적량개자계통，분별건립이자적역학모형화진동미분방정。재구해과정중，통과위이협조조건화량개자계통간상호작용력상등적원칙파량개자계통적진동미분방정우합기래。이용유한원분석연건 ANYSYS 적이차개발어언 APDL 편사료구해차교계통우합진동미분방정적질대계산명령류。이교면불평순위격진원，분석료주과위550 m 적복건장문대교당다차량통과시재각급교면불평순정황하적동력향응。계산결과표명，수착교면불평순정도적증가，교량결구화차체적동력향응균정비선성증대，기중교량주과과중위이、주과최외측랍색응력화차량가속도변화현저。
The vehicle and bridge structure are taken as two interactive subsystems,and the me-chanics model and vibration differential equations of them are respectively established.During calcula-tion,the differential equations of two subsystems are coupled by the conditions of geometric compatibility and the principle that the interactive forces between the two subsystems are equivalent.The iterative cal-culation command stream to solve coupled vibration differential equations of vehicle-bridge system is com-piled by APDL language for secondary development in finite element analyzing software ANSYS.The road roughness is taken as excitation source and the dynamic responses of Fujian Changmen cable-stayed bridge with main span of 500m are analyzed under road surface roughness for each grade when multiple vehicles pass the bridge.The results calculated indicate that the dynamic responses of both bridge struc-ture and vehicle nonlinearly increase with the increment of bridge pavement surface roughness.The varia-tion of displacement at midpoint of main span,the stress of the outermost cable in main span and vehicle acceleration is significant.