摘要
强冲击载荷会严重威胁舰船生命力,对于冲击作用下舰船结构毁伤的精确预报是舰船防护设计和提高舰船生命力的重要环节.考虑到传统有网格算法在结构断裂模拟上遇到的挑战,本文在前期工作的基础上,建立了强冲击载荷作用下结构毁伤的完全无网格模型与计算方法,采用光滑粒子流体动力学(Smoothed Particle Hydrodynamics,SPH)方法计算水下爆炸载荷,基于重构核粒子方法(Reproducing Kernel Particle Method,RKPM)建立结构接触、断裂计算模型.依据法通量方法,耦合RKPM和SPH构建了完全无网格流固耦合三维模型与计算方法,通过多个复杂算例充分验证了该数值计算模型的有效性.进一步开发了强冲击作用下舰船结构毁伤模拟程序,提高了程序的鲁棒性.该程序作为模块已融入到具有完全自主知识产权的FSLAB工业软件之中.与传统网格计算方法相比,本文数值模型在处理结构断裂、损伤等方面有优势,可为舰船防护结构设计提供基础性技术支撑.
The strong impact load will seriously threaten the ship vitality. The accurate prediction of the damage of ship structure under impact is an important step to the design of the ship protection structure to improve the ship vitality. Since the mesh-based method faces challenges in the simulation of structural fracture, on the basis of previous work, a complete meshless square model and calculation method of structural damage under strong impact load are established in this work. The SPH method is adopted in the calculation of fluid load in underwater explosion, and the RKPM is applied in the modeling of contact and fracture of the ship structure. Finally, based on the normal flux method and coupled with SPH-RKPM, a completely 3 D meshless fluid-structure coupling numerical model is built, and several numerical complex examples verify the effectiveness of the numerical model. The numerical program for ship structural damage under strong impact is further developed and the robustness of the program is improved. As a module, the program has been integrated into the FSLAB industrial software with independent intellectual property rights. Compared with the traditional grid method, the numerical model has advantages in dealing with structural fracture and damage, and can provide necessary technical support for the design of ship protection structure.
作者
彭玉祥
张阿漫
薛冰
礼绍博
PENG YuXiang;ZHANG AMan;XUE Bing;LI ShaoBo(College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《中国科学：物理学、力学、天文学》
CSCD
北大核心
2021年第12期146-159,共14页
Scientia Sinica Physica,Mechanica & Astronomica
基金
国家自然科学基金(编号:51925904,51909042)资助项目。
