摘   要：现代海战中，由于导弹武器的发展，必然会发生导弹在舰艇内部发生爆炸的情况。随着爆炸当量与爆炸冲击波持续时间的明显增加，舰船的结构所受的爆炸载荷也更为恶劣。因此，积极开展爆炸载荷作用下的舱壁的结构响应研究对舰船抗爆能力与生命力和战斗力具有重要意义。

本文在分析、运用爆炸冲击波理论的基础上利用瞬态动力学有限元分析软件MSC.DYTRAN进行数值模拟。先简单介绍爆炸冲击波理论以及有限元技术发展，在对复合舱壁模型进行网格划分建立模型，确定多种计算工况，研究不同工况下的复合舱壁结构响应，包括吸能情况以及应力分布，比较分析计算结果得出结论。

主要研究内容如下：

（1）研究爆炸冲击波理论，开展有限元数值仿真技术的研究。在爆炸冲击波理论基础上，结合有限元MSC.DYTRAN基本理论，建立复合舱壁模型，研究了空中爆炸冲击波的数值模拟方法；

（2）对舱室结构进行简化，在冲击波载荷下对舱室构件进行简化，确定简化的有限元模型。在此简化的基础上，分别对欧拉网格的大小、边界条件、耦合面选取，进行数值仿真分析计算；

（3）冲击波载荷下复合舱壁结构的响应分析。对所建立的复合舱室模型进行数值模拟研究，分析爆炸冲击波对复合舱壁结构与加强筋舱壁结构的不同，并计算舱壁结构在不同炸药量、不同爆距下的结构响应。

关键词：舱内爆炸；爆炸载荷；复合舱壁；结构响应；船壁结构型式

ABSTRACT：Modern naval warfare, due to the development of missile weapons , that will inevitably occur in the ship within the bomb explosion situation. With the explosion equivalent and explosive shock wave duration increased significantly, the structure of the ship suffered explosive load is also worse. Therefore, it is very important to study the structural response of the bulkhead under the action of explosion load, which is very important for the ship's anti-blast ability, vitality and combat effectiveness.

In this paper, the numerical simulation of MSC.DYTRAN is carried out by using the transient dynamic finite element analysis software on the basis of the theory of blast shock wave.

This paper introduces the theory of explosion shock wave and the development of finite element technology. In this paper, the model of the composite bulkhead model is modeled and the various calculation conditions are determined to study the response of composite bulkhead structure under different working conditions, including energy absorption and Stress distribution, comparative analysis of the results obtained conclusions.

The main research contents are as follows：

（1）Research on Explosive Shock Wave Theory and Research on Finite Element Numerical Simulation. Based on the theory of blast shock wave, combined with finite element MSC.DYTRAN basic theory, the composite bulkhead model is established, and the numerical simulation method of airborne shock wave is studied.

（2）The chamber structure is simplified and the chamber components are simplified under the shock load to determine the simplified finite element model. On the basis of this simplification, the Eulerian grid size, boundary condition and coupling surface are selected respectively, and the numerical simulation analysis is carried out.

（3）Response Analysis of Composite Bulkhead Structure under Shock Loading. The numerical simulation of the composite chamber model is carried out to analyze the difference between the composite bulkhead structure and the stiffener bulkhead structure, and the structural response of the bulkhead structure under different explosive quantities and different bursts is analyzed.

Keyword：explosion in cargo;shock wave; double bulkhed structure;structure respose;types of bulkhead structure

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