CAJ | 학술논문

研究了磁浮车辆与三跨刚构桥之间的耦合振动.考虑主动控制电磁悬浮力的作用,建立了磁浮车辆-桥梁耦合振动分析模型.使用数值方法对车辆通过时桥梁的动力反应进行了分析.结果表明桥梁的梁墩线刚度比宜在2.0到3.0之间.桥梁的动力反应随着桥梁刚度的降低、车速和跨度比的增加而加剧.建议桥梁动力设计中以控制桥梁的冲击系数和振动加速度为主.移动荷载模型和移动质量模型在磁浮桥梁动力设计中均不适用.所得结论可为高速磁浮三跨刚构桥设计提供理论依据.
연구료자부차량여삼과강구교지간적우합진동.고필주동공제전자현부력적작용,건립료자부차량-교량우합진동분석모형.사용수치방법대차량통과시교량적동력반응진행료분석.결과표명교량적량돈선강도비의재2.0도3.0지간.교량적동력반응수착교량강도적강저、차속화과도비적증가이가극.건의교량동력설계중이공제교량적충격계수화진동가속도위주.이동하재모형화이동질량모형재자부교량동력설계중균불괄용.소득결론가위고속자부삼과강구교설계제공이론의거.
The dynamic interaction between the maglev vehicle and the three-span rigid frame bridge is discussed. With the consideration of magnetic force, the interaction model is developed. Numerical simulations are performed to study the dynamic characteristics of the bridge during vehicle movement along the bridge. The results show that a reasonable value of the linear stiffness ratio of columns to beams is between 2. 0 and 3.0.The dynamic responses of the bridge are aggravated with the decrease in bending rigidity and the increase in vehicle speed and the span ratio of the bridge. It is suggested that a definite way is to control impact coefficients and acceleration in the dynamic design of the bridge. It is unsuitable to adopt the moving load model and the moving mass model in the design. The proposed results can serve in the design of high-speed maglev three-span rigid frame bridges.