3D Simulation Of Ship-Bridge Collision

With the strengthening national strength and developing economy,the demand for bridges and increasing investment,according to the incomplete statistics,China has all kinds of bridge nearly fifty thousand,each year,about 10,000 bridges to be built.Therefore,ship-bridge collision has to be taken more and more attention,and whether the bridge can withstand ship collision without damage caused catastrophic consequences,is the collapse of each bridge construction before the problem must be calculated.So,through to the ship collision piers of this process analysis and study of the bridge are analyzed in the impact of state changes,and the ship itself changes the state,using 3d image technology of collision detection technology and 3d real-time rendering technology will be the ship collision bridge disaster 3d scene is simulated, the construction and development of our Bridges,meanwhile,is of great significance to the accident happened ship bridge treatment method has great enlightenment.In this paper,a realistic background,research on the ship collision bridge simulation system.In the system,this paper mainly to study and solve the problem of two key simulation system and visualization of collision detection problem:the rendering.First,for collision detection problem,first introduced the current phase of collision detection algorithm,the scope and analysis algorithm,and then in all aspects of performance,and based on the combination of the plane collision detection algorithm of dynamic octree algorithm,this method is compared with the traditional collision detection algorithm is calculated,and the large space occupied large faults,a very good improvement.Secondly,the real-time rendering technology of visualization,make full use of widely used nowadays,in-depth technical details.LOD level The algorithm is based on grid ROAM the LOD algorithm,the rules of the expansion of the scale of scene, with the scene when the larger number of triangles,its computation time consuming, and low efficiency of the algorithm is very outstanding,therefore,the shortcomings of the adaptive proposed multi-resolution model,according to ROAM algorithm,using the correlation between viewpoint partitioned algorithms,SOAM methods to achieve in a certain degree of improvement of traditional ROAM,improving the efficiency of algorithm,enhance the effectiveness of the proposed algorithm and real-time.Finally,the simulation system in the process of design and implementation, dynamic octree algorithm and the adaptive algorithm using multi-resolution,its good operation also prove the validity of the proposed algorithm,In addition,due to the simulation system is involved,the collision response to problems in engineering mechanics model using the finite element method is used widely,and combined with its perfect model of software tools,it has be resovled...