节点文献
敷设抗冲覆盖层的双层圆柱壳抗冲性能研究
Dynamic performance of double-walled cylindrical shell structure with anti-shock coating
【摘要】 [目的]旨在研究双壳体潜艇非接触水下爆炸下的抗冲性能,提出在壳体表面敷设抗冲覆盖层的防护方法,以内壳冲击响应为评价指标,研究不同敷设方式下的抗冲击效能。[方法]采用声-固耦合法,建立外流场-外壳体-舷间水-内壳体的非线性流-固耦合冲击动力学模型,对内外壳外表面均敷设覆盖层(工况2)、仅内壳外表面敷设覆盖层(工况3)和仅外壳外表面敷设覆盖层(工况4)情况下的壳体冲击响应及覆盖层抗冲击效能进行对比分析。[结果]结果表明,对于工况2,内壳体迎爆面不同测点处的加速度、速度和位移峰值平均降低量分别达94.1%,81.2%和23.3%,周向和纵向微应变峰值平均降低量达67.7%和88.3%;对于工况3,相应值分别为60.4%, 45.4%和-2.1%,以及34.6%和68.0%;对于工况4,相应值分别达86.7%, 75.1%和20.3%,以及68.6%和77.8%。[结论]针对双壳体潜艇,在壳体上敷设抗冲覆盖层可有效降低内壳冲击响应,尤其是加速度和速度响应。在外壳体外表面上敷设覆盖层时的抗冲击效果更好。
【Abstract】 [Objectives]In order to enhance the anti-shock performance of a double-hull submarine against non-contact underwater explosions, a method of plastering anti-shock coating on the surface of double-hull ships is proposed, and the shock response of the inner hull is used to evaluate the shock mitigation effects of different anti-shock coating approaches. [Methods]By employing the acoustic-solid coupling method, a nonlinear fluid-structure coupling dynamic model is established for the external flow field, outer hull, gapped water and inner hull. Three approaches to laying anti-shock coating on the hull are compared, namely covering it on both the inner and outer hulls(Case 2), on the inner hull(Case 3) and on the outer hull(Case 4).[Results]As the results show, in Case 2, the average reduction rates in the peak values of acceleration, velocity and displacement are 94.1%, 81.2% and 23.3% respectively, while the average reduction rates in the peak values of circumferential and axial micro-strain are 67.7% and 88.3% respectively; in Case 3, the three values are 60.4%, 45.4% and-2.1%, and the two values are 34.6% and 68.0%; and in Case 4, the three values are86.7%, 75.1% and 20.3%, and the two values are 68.6% and 77.8%. [Conclusions]Covering the hull with anti-shock coating can effectively enhance the anti-shock performance of double-hull ships, especially in terms of the acceleration and velocity results, and coating the outer hull plays a primary protective role.
【Key words】 double-hull submarines; underwater explosion; anti-shock coating;
- 【文献出处】 中国舰船研究 ,Chinese Journal of Ship Research , 编辑部邮箱 ,2024年S1期
- 【分类号】U674.76
- 【下载频次】8