针对大跨度悬索桥可能遭受的爆炸冲击波威胁,研究了空中爆炸冲击波荷载作用下悬索桥的竖向弯曲振动。基于悬索桥挠度理论,采用模态叠加法得到了悬索桥空中爆炸冲击波作用下动挠度的解析解。算例表明,最大动挠度解析解与数值模拟结果吻合较好,误差小于10%。 In view of the threat of blast shock wave to the long-span suspension bridge, the vertical bending vibration of the suspension bridge under air blast shock wave is studied. Based on the theory of suspension bridge deflection, the analytic solution of dynamic deflection of suspension bridge under air blast shock wave is obtained by modal superposition method. The examples show that the analytical solution of maximum dynamic deflection agrees well with the numerical simulation, and the error is less than 10%.