舰船结构空中爆炸载荷的高精度数值计算程序(英文)

High-Resolution Hydrocode for Air Explosion Load Assessments in Ship Structure Vulnerability Analysis and Prediction

给出了一种舰船结构空中爆炸载荷的高精度数值计算程序。该程序采用基于通量修正算法的有限差分格式编写。它在冲击波阵面处达到四阶精度且耗用计算资源较少,是一种简单高效的计算程序。因此该程序特别适用于大尺度船舶结构受空中爆炸载荷的计算。程序的可靠性和准确性通过击波管试验和空中爆炸试验数据进行了检验。最后给出了一个典型船舶结构受空中爆炸载荷的算例。

A simple and efficient high-resolution hydrocode is presented for air explosion loading assessments in ship structure vulnerability analysis and prediction. The code solves the convective transport equations using finite different method based on the Flux-Corrected-Transport （FCT） algorithm. It propagates the shock with fourth-order phase accuracy and without computing costs usually associated with these simulations. Accordingly, this code is especially applicable to simulate the explosion air blast propagate on some large-scale problems such as found in ship structure vulnerability studies. Some numerical experiments on shock tubes and air explosion are performed to validate the accuracy of present code. The comparisons between numerical results and experimental data or classical theory show very good agreement. Finallys a three-dimensional application example is presented to demonstrate the practical use of presented code.