英文版推荐 | 哈尔滨工程大学：大型舰船圆筒型水下防护结构性能分析

摘要：In response to the problems of high weight and relatively low protective efficiency associated with traditional multicamerate stru

English Edition

Recommendation

以下展示的是《中国舰船研究》2024年第3期英文翻译版文章，题为

Analysis of protective performance of large ship's cylindrical underwater protection structure

大型舰船圆筒型水下防护结构性能分析

In response to the problems of high weight and relatively low protective efficiency associated with traditional multicamerate structures(i.e., void compartment-liquid tank-void compartment), this study explores the protective performance of underwater cylindrical protective structures.

A numerical model based on an arbitrary Lagrangian-Eulerian (ALE) algorithm is established and verified through a contact explosion case involving a typical structure. On this basis, models of the traditional multicamerate protective structure and cylindrical protective structure are then established. Through numerical simulation, parameters such as maximal stress, strain and energy absorption after underwater contact explosion with the same explosive charge are analyzed, and their respective protective performances obtained.

The displacement of the defended longitudinal wall of the cylindrical protective structure is smaller than that of the watertight longitudinal wall, which is contrary to the behavior of traditional multicamerate protective structures. Additionally, the energy absorbed by the deck and double bottom is 9.92% less than that of the traditional protective structure, demonstrating a significant advantage in resisting deformation in the vertical direction.

The results of this study indicate that the cylindrical protective structure exhibits a lower level of damage under the same charge, providing new insights for the innovative design of underwater protection structures.

针对传统“空舱−液舱−空舱”三舱型防护结构重量大、防护效率较低的问题，探讨圆筒型水下防护结构的防护性能。

建立基于任意拉格朗日−欧拉（ALE）算法的数值模型，通过典型的结构接触爆炸算例，验证ALE算法的精度；然后在此基础上分别建立传统的三舱型防护结构和圆筒型防护结构模型，通过数值模拟分析相同药量水下接触爆炸后的应力、应变最大值以及能量吸收等特征参数，从而得到各自的防护性能。

结果显示，圆筒型防护结构防御纵壁的位移小于防水纵壁的位移，这与传统三舱型防护结构的规律相反；甲板、双层底结构吸收的能量相比传统防护结构少了9.92%，具有明显的垂向抗变形优势。

研究表明，圆筒型防护结构在药量相同的情况下其毁伤程度更低，可为水下防护结构的创新设计提供新的思路。

圆筒型防护结构模型及参数

往期英文文章回顾：

1.Protective characteristics of energy absorbing elements under typical cabin explosion loads / 典型舱内爆炸载荷作用下吸能元件防护特性研究

2.Numerical simulation of interaction between bubble and free surface considering flow field viscosity / 考虑流场黏性的气泡与自由液面作用的数值模拟

3.TNT equivalency method in confined cabin based on structural response / 基于结构响应的舱室内爆TNT等效方法

4.Ship trajectory anomaly detection method based on encoder-decoder architecture composed of Transformer_LSTM modules / 基于Transformer_LSTM编解码器模型的船舶轨迹异常检测方法

中国舰船研究

Chinese Journal of Ship Research