特种结构物内爆炸动力响应分析

Dynamic response analysis of special structures under inner explosion

从分析炸冲击波在障碍物上的反射开始,详细分析了结构物内部冲击波荷载的作用规律,给出了作用在具有球形顶壳的圆柱形建筑物侧壁和球形顶壳上的冲击波压力表达式,并通过经典弹性理论,假设结构材料是各项异性弹性材料,推导出了建筑物侧壁的轴向径向振动的计算表达式,计算得到了侧墙位移和内力曲线。计算表明:侧墙轴向位移最大,侧墙中间的某一位置径向位移和环向力Nφ取得最大值,而侧墙下部弯矩Mx剪力Qx和法向内力Nx达到最大值。

The interaction pattern of internal blast load in structure was analysed in detail, starting with the study on reflection on barrier of explosion block wave. The expressions of shock wave pressure on side wall and top shell of structure with spherical shell were provided. The expressions of axial and radial vibration of the side wall of structure were derived according to the classical elasticity theory. The displacement versus inner force curve of side wall, simulating the structure material as anisotropic, was calculated. Calculation results indicate that, the axial displacement reaches maximum at the upside of side wall, the radial displacement and ring force N, reach maximum at the middle of side wall, and the maximum moment Mx, shear Qx and normal force Nx appear at the lower part of side wall.