封闭空间爆炸载荷特性研究

摘要

The blast load in closed space mainly contains transient shock waves and long duration quasi-static o-verpressure.In order to investigate the characteristics of blasting loading in closed space,the 3D high resolution hydro-code was developed in the present work by implementing three-order Weno finite difference scheme based on FORTRAN platform.The reliability of the developed numerical program was verified by the classical examples of sod shock tube and double detonation wave collision.Then,the validated code was used to simulate the blast waves from condensed explosives in closed space.A simplified blast load model was proposed based on the principle of equiva-lent impulse.Furthermore,the formula for quasi-static pressure was derived theoretically,which was verified by nu-merical results.Both the 3D numerical calculation program of high precision explosion wave and the simplified blast load model could be used to calculate the input loading for design of anti-explosion engineering structures.%封闭空间爆炸载荷主要包含瞬态冲击波和持续时间较长的准静态超压.为了研究封闭空间爆炸载荷特性,基于FORTRAN平台,采用三阶WENO有限差分格式编写了爆炸波高精度三维数值计算程序.应用Sod激波管、双爆轰波碰撞等经典算例验证了所开发数值程序的可靠性.在封闭空间内炸药爆炸波数值计算的基础上,基于冲量等效原则提出封闭空间内爆炸载荷简化模型,理论推导给出准静态超压峰值计算公式并通过数值计算结果验证了该公式的可靠性.开发的高精度爆炸波三维数值计算程序及提出的简化载荷模型可用于封闭空间内爆炸载荷的快速计算,为工程抗爆结构设计提供载荷输入.