气垫船舶与水面冲击过程的模型仿真分析

Model Simulation and Analysis of Impact Process for Air Ship on Water Surface

气垫船舶驾驶中与水面冲击过程分析是保护船体安全的关键。在气垫船舶在水面冲击的过程中,气垫船的围裙与坞仓壁发生碰撞的变形的过程复杂,气垫船驾驶仿真中的气垫船与水面碰撞的冲击力和力矩的变化呈现较大的非线性。传统的气垫船舶与水面冲击过程分析模型中,均以碰撞过程为刚性冲击力不变形和气垫船力矩变化较平缓为前提假设,导致对冲击的分析效果欠佳。提出利用有限元方法建立围裙触水缩进的气垫船舶水面冲击分析方法,根据微幅波波浪叠加原理建立多气室非均匀气垫压力面,获得全垫升气垫船非线性六自由度操纵运动分析结果,建立岸滩坡面理论模型,实现气垫船水面和陆地航行状态的衔接和过渡。仿真结果表明,上述模型能真实仿真全垫升气垫船的水面冲击运动状态,优化较为明显。

Air ship＇s impact with the water in process analysis is the key to protect the security of the hull. On a cushion of ship impact in the process of the water of the hovercraft apron collision with the dock warehouse wall deformation process is extremely complex, air cushion vehicle driving simulation of the hovercraft and the change of the surface of the impact of the crash and the torque present larger nonlinear. Traditional air ship and water shock process analysis model, in the collision process of rigid impact deformation and hovercraft torque changes more gentle as premise, leads to the inefficiency of the analysis of the impact. A water surface impact analysis method for air cushion ship is put forward based on the finite element method. A non-uniform air cushion pressure surface for multiple air chambers is establish according to a slight wave superposition principle, the movement for the lift hovercraft of nonlin- ear six degrees of freedom is analyzed, a theoretical model along slope surface is set up, and the connection and transition of water and land navigation state of the hovercraft are implemented. The simulation results show that the model can simulate the real full lift movement, the optimization is obvious.