水面舰船作战时容易受到水下爆炸载荷作用，对其局部强度及总纵强度产生影响。对于舰船结构损伤机理及特性的研究，一般采用简化船体梁模型。本文首先对采用的耦合的欧拉-拉格朗日方法进行验证。然后，对水下爆炸载荷作用下船体梁动态响应开展研究。此外，采用JWL方程作为炸药的状态方程，用以模拟冲击波载荷与气泡载荷的联合作用。结果表明，在本文工况条件下，冲击波载荷未对船体梁结构产生明显破坏，气泡载荷作用下船体梁产生明显的中拱、中垂变形，尤其是气泡收缩阶段，船体梁产生严重的中垂变形，进而形成塑性铰。此外，虽然冲击波载荷未对结构产生明显的破坏，但是其作用阶段船体梁结构上产生较高的加速度。
Warships are susceptible to underwater explosive loads during combat, which can affect their local strength and overall longitudinal strength. A simplified model called ship hull girder is used to study the deformation mechanism of the warships in this paper. The coupled Eulerian-Lagrangian method used in this paper is validated firstly. Subsequently, researches on the dynamic response of ship hull girder under underwater explosion loads were conducted. The JWL equation is used to simulate the combined effects of shock wave and bubble. The results show that under the working conditions studied in this paper, the shock wave load did not cause significant damage to the ship hull girder. Due to bubble load, significant hogging and sagging deformation was conducted, especially a plastic hinge occurs during the bubble collapse stage. In addition, higher acceleration on the ship hull girder is generated by shock wave load.
2025,47(6): 7-12 收稿日期：2024-3-23
DOI：10.3404/j.issn.1672-7649.2025.06.002
分类号：U663.2
作者简介：甘宁（1993 – ），男，博士，工程师，研究方向为舰艇总体技术
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