飞机在预应力桥梁上降落过程的数值模拟分析

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振动与冲击 ›› 2010, Vol. 29 ›› Issue (1) : 188-192.

论文

飞机在预应力桥梁上降落过程的数值模拟分析

罗昆升1,2;赵跃堂1;陈云鹤1;张祥伟3

作者信息 +

Numerical Simulation of Landing Process of Plane on Prestressed Bridge

LUO Kun-sheng1,2;CHEN Yun-he1;ZHAO Yue-tang1;ZHANG Xiang-wei3

Author information +

文章历史 +

摘要

将现有高等级公路直线段应急改成飞机跑道是特殊情况下维持空运保障能力的有效途径之一，但公路直线段包含的中小跨径桥梁将会影响飞机起降。文中针对目前高等级公路中广泛存在的13m与10m跨径的标准多跨简支预应力梁桥梁，运用有限元分析软件LS-DYNA分析了预应力桥梁的初始状态及飞机在预应力桥梁上着陆时对桥梁的冲击响应，据此得到了高等级公路13m和10m跨径的桥梁在飞机直接着陆情况下的动力响应。计算表明13m跨径的预应力桥梁承受某型飞机直接降落相对冒险，所得到的有关结论可供今后在高等级公路直线段中选择应急飞机跑道路段参考。

Abstract

Transforming existing straight segment of high rank road into airstrip for urgency is one effective means to maintain wartime airlift safeguard capacity, but rise and fall of plane would be affected by middle and small-span bridges of straight segment of high rank roads. In this thesis, standard multi-span simple-bracket 13-meter-span preparatory stress bridges are researched which widely exist in present high rank roads. The initial status of preparatory stress bridge is analyzed with LS-DYNA. The strike response of bridges by plane landing is also analyzed by the same means. Hereby, bearing capacity of bridges with 13 or 10 meter span are calculated when planes directly land. The result indicates that 13-meter-span bridges are comparatively risky to support direct landing of some plane. The relevant conclusions can be references for choosing emergent plane runway among straight segments of high rank roads in future.

导出引用

罗昆升;赵跃堂;陈云鹤;张祥伟. 飞机在预应力桥梁上降落过程的数值模拟分析[J]. 振动与冲击, 2010, 29(1): 188-192

LUO Kun-sheng;CHEN Yun-he;ZHAO Yue-tang;ZHANG Xiang-wei. Numerical Simulation of Landing Process of Plane on Prestressed Bridge[J]. Journal of Vibration and Shock, 2010, 29(1): 188-192