以防护层中新型抗爆工程设计为背景,对含柱壳混凝土介质中应力波的衰减和演化规律进行研究和数值分析,经过大量的计算发现,柱壳的半径、径厚比、位置及其排列形式对结构的削波性能有着较大的影响。计算结果表明:柱壳的半径或径厚比越大、越靠近被保护区域,结构的削波性能越好;柱壳间的间距越小,结构对应力波的隔离效应越明显,当综合考虑结构的变形和抗强静压等作用,其间距取为柱壳半径的一半时,结构的削波性能最佳。

For the anti-explosion design in protective engineering, attenuation mechanism and evolution law of stress waves in defense layer where cylindrical shells embedded were focused on. Based on many numerical calculations, it has been found that protective performance of the structure is closely related with the radius, diameter-thickness ratio, position of the shell and the arrangement of the shells. The results show that the greater of radius or the diameter thickness ratio the shell has, or the closer to the protected area the shell is, the better protective performance the structure has, and when the horizontal space between the shells decreases, the more effective protection of the structure obtains. When the deformation and crushing resistance are taken into account, half of the radius of the shell is the optimal space between the shells.