柱壳结构的弥散效应及对应力波的削弱作用

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (12) : 195-200.

论文

柱壳结构的弥散效应及对应力波的削弱作用

高光发1,2; 李永池2; 赵凯2; 庞有超3

作者信息 +

Dispersion and attenuation effects on stress waves of cylindrical shell in defense layer

Gao Guang-fa1,2; Li Yong-chi2; Zhao Kai2; Pang You-chao3

Author information +

文章历史 +

摘要

以防护层中新型抗爆工程设计为背景，对含孔穴或柱壳混凝土介质中应力波的衰减和演化规律进行理论和数值分析。经过分析和数值计算发现，应力波在孔穴或柱壳表面附近呈现明显的弥散和绕射现象，此两种结构对下方的应力波有显著的削弱作用，但柱壳结构在防护效果上明显优于孔穴结构。同时，针对不同半径的柱壳结构进行数值计算，结果表明：随着柱壳半径的增大，结构的削波性能和防护范围得到提高；当将多个柱壳水平等间隔的进行排列时，其下方各测点的应力峰值基本相等，且明显小于单个柱壳时其下方各相应测点应力峰值的最小值。其结果为在抗爆防震工程中科学的防护层的设计提供了一定的理论依据。

Abstract

Aimed at anti-explosion design in defense engineering, attenuation mechanism and evolution law of stress waves in defense layer which cavities or cylindrical shells were embedded in were focused on. Based on theoretical analysis and numerical simulations, it was found that dispersion and diffraction effect of stress waves were occurred in the concrete material, which significantly weakened the strength of stress waves behind the cavity or shell, and the structure embedding shell has better protection than the structure embedding cavity. Numerical calculations for different radius of the shells were preformed. The results show: the protect effect and scope is amplified as the radius of the shells are increased; and when several shells were horizontally equispacedly arranged in defense layer, the stress peaks of the measure points are obviously less than the minimum of stress peaks of corresponding measure points in the structure that single cylindrical shell was embedded in. all those can be referred to design of advanced defense layer in anti-explosion engineering.

导出引用

高光发;李永池;赵凯;庞有超. 柱壳结构的弥散效应及对应力波的削弱作用[J]. 振动与冲击, 2011, 30(12): 195-200

Gao Guang-fa; Li Yong-chi; Zhao Kai; Pang You-chao. Dispersion and attenuation effects on stress waves of cylindrical shell in defense layer[J]. Journal of Vibration and Shock, 2011, 30(12): 195-200