海浪浪花与船行波建模绘制技术研究与实现

发布时间：2018-01-16 13:15

本文关键词：海浪浪花与船行波建模绘制技术研究与实现　出处：《国防科学技术大学》2014年硕士论文　论文类型：学位论文

【摘要】：在虚拟海洋场景中人们研究较多的是海面建模,它主要对海面的波动现象进行模拟仿真,然而海洋场景中的一些特效现象如海浪浪花、船行波以及运动舰船周围的浪花等对虚拟海洋场景的真实性有较大影响,因而对这些海洋场景特效现象的模拟仿真成为逼真的海洋场景模拟的重要研究内容。本文针对已有海浪浪花和舰船轨迹模拟方法不足和问题,研究探讨新的三维船行波和海浪浪花建模方法,并基于Osg Ocean海浪模拟开源平台完成场景设计实现。论文的主要工作和研究成果如下:1、提出一种基于开尔文波的用于三维船行波建模与模拟方法。该方法以定性特征与船行波特征一致的开尔文波理论为基础,结合海面风速、风向和舰船航向等因素的影响,建立三维船行波模型,计算船行轨迹中位于波峰线上的轨迹点和波峰线间的轨迹点的坐标,实现不同船型和船速条件的自适应三维船行波模拟。实验结果表明,所提出的建模与模拟方法可较真实的表现舰船航行两侧所产生的船行波。2、基于元胞自动机理论和多粒子模型,本文提出一种舰船运动浪花特效模拟方法。该方法根据舰船运动与水体作用产生浪花的机理和特点,考虑了舰船速度对舰船不同位置点海浪浪花形态的影响,基于元胞自动机理论和多粒子模型对海浪浪花场景特效进行建模和模拟。实验结果表明,所提出的方法可自动生成较真实的运动舰船头浪、侧浪和艉浪浪花特效。3、在深入分析海浪模拟开源软件平台Osg Ocean的软件模块组成结构和程序流程基础上,基于Osg Ocean设计实现了三维船行波模拟软件模块和舰船运动浪花特效模拟软件模块,验证了所提出的三维船行波模拟方法和海浪浪花特效模拟方法的正确性和有效性。
[Abstract]:In the virtual ocean scene more people study is surface modeling, simulation which fluctuation on the surface of the sea, but some of the effects of ocean scene phenomena such as wave waves, have great influence around the ship wave and the motion of ship waves and authenticity of virtual ocean scene simulation, and Simulation of these ocean scene the phenomenon has become an important research content of realistic simulation of ocean scene. According to the existing ocean waves and ship trajectory simulation method of deficiencies and problems, study new three-dimensional ship wave and wave wave modeling method, Osg and Ocean wave simulation design based on open source platform to complete the scene. The main work and research results are as follows: 1 Kelvin, put forward a kind of wave for three-dimensional ship wave modeling and simulation method based on this paper. By qualitative features and characteristics of the ship wave Kelvin wave theory, combined with the sea surface wind speed, wind direction and ship heading and other factors, the establishment of three-dimensional ship wave model, to calculate the coordinates of track points located on the crest line and the crest line between the trajectory of ship trajectory in different speed conditions, ship and adaptive three-dimensional ship wave simulation. The experimental results show that the the proposed modeling, and simulation method can be a real performance of ship ship wave.2 on both sides of the cellular automaton theory and multi particle model based on, this paper proposes a ship motion simulation method. The effects of spray method of generating mechanism and characteristics of spray according to the ship motion and water effect, considering the influence of ship the speed of ship waves waves from different positions of morphology, cellular automaton theory and multi particle model for modeling and Simulation of sea waves based on scene. Experimental results show that the The proposed method can automatically generate a real head moving ship wave, side wave and stern wave waves effects.3 simulation software module, open source software platform Osg Ocean in depth analysis of wave component based structure and program flow, Osg Ocean design and implementation of three-dimensional ship wave simulation software module and ship motion simulation software module based on the waves and verify the correctness and effectiveness of the proposed three-dimensional ship wave simulation method and the effects of spray simulation method.

【学位授予单位】：国防科学技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P731.2;TP391.9

【参考文献】