基于仿真与量纲分析的不同药量TNT内爆下多舱室结构毁伤规律研究

利用流固耦合算法，模拟了不同药量TNT内爆下大尺寸多舱室结构的毁伤效应。将各舱室划分为爆炸舱、共面邻舱、共边界邻舱和共点邻舱，再划分内爆下多舱室结构的毁伤等级。通过量纲分析，研究了内爆载荷下舱壁的变形失效规律，推导了内爆下多舱室结构的无量纲毁伤数，该毁伤数考虑了内爆载荷、材料性能和作用空间等因素，最后给出快速毁伤预测方法。研究结果表明:（1）内爆下多舱室结构的毁伤特点主要表现为舱壁挠曲变形、舱壁中心冲切失效、舱壁边界撕裂；（2）舱壁挠曲变形的挠厚比δ/H和固定边界撕裂的裂缝长厚比l/H均与药量-单舱室容积比m/V有明显线性关系；（3）提出的无量纲毁伤数和快速预测方法能够反映内爆下多舱室结构的毁伤情况，可为舰船毁伤研究提供参考。

Regulation of different quantity TNT blasting in multi-cabin structure based on simulation and dimensional analysis

This paper simulated damage effect of the large size multi-cabin structure under internal blast. Cabins were divided into: explosion cabin, coplanar cabin, common boundary cabin and common point cabin, and the damage grade was presented to reflect the destructiveness. This paper studied the regulation of deformation and failure of bulkhead under internal blast by the dimensional analysis, in which a dimensionless damage number was deduced. Furthermore, the number can reflect the characteristics of internal explosive load, material properties and structure. Finally, a rapid damage prediction method was given. The analysis result shows: (1) the characteristics of damage include large deflection deformation, punching failure in the center of plate, tearing along the boundary; (2) the ratio of deflection to thickness (δ/H) has clear linear relationship with the ratio of the quantity to the volume of the cabin (m/V), and so is the ratio of length to thickness of tearing (l/H); (3) the dimensionless damage number and method of rapid damage assessment can reflect the destructiveness, which means the result and analysis method of this paper can provide valuable reference for the research of ship damage.