← DownloadsLS-DYNA Downloads
LS-DYNA软件在船舶行业的应用
Feapro Engineering范吉仿真是从事仿真和数值计算的高科技公司，公司业务涉及材料、冶金、机电、核能、船舶、航空航天、兵器等领域，主要销售压电、磁致伸缩器件仿真软件、冶金模拟软件、核能设计及安全仿真软件、显式有限元软件、流体仿真软件、多体动力学软件、开源软件以及有限元前处理软件。并为各个领域的研究机构和企业用户提供技术咨询服务。我们提供先进的在线软件体验平台、远程技术演示和培训服务以及金牌售后技术支持。
Download file ⇩
Ship and submarine structures have long been studied thanks to finite element methods. Their large dimension and complexity, the coupling with heavy fluid and the presence of a free surface raise numerical problems on the field of dynamic analysis. This is particularly true for extreme or accidental
situations such as collision and grounding, underwater explosion and severe fluid impact.
This paper describes first numerical methods and tools developed in LS-DYNA and used in the simulation of ship-submarine collisions, with a focu
s on the outer collision dynamics, i.e. global motion of the impacted structure. Using a new version of the rigid body dynamic program MCOL included in LS-DYNA, the influence of hydrodynamic effects is highlighted in ship-submarine collisions and in military surface ship collisions.
The second part of this paper is dedicated to dynamic response analysis of surface ship or submarines submitted to underwater explosions (UNDEX). Coupled with the Underwater Shock Analysis (USA) code, LS-DYNA is a powerful tool used to simulate the response of ships or submarines to bo
th the shock wave induced by the detonation and the bubble gas effects. Through some examples of 3D numerical models of military vessels, the paper presents the capabilities of the LS-DYNA/USA tool and some difficulties encountered in such an analysis. Impulse loads with high pressure peaks may occur when a ship bottom hits the water with a high velocity. This is often called "slamming”. Sometimes ships suffer from local damage from the impact load or large buckling on the deck. In the last part of this paper, LS-DYNA is used to simulate such water-entries. Interaction between lagrangian bodies and multi-materials eulerian fluids (air and water) is taken into account thanks to a penalty coupling method.
GALLERY