基于虚拟现实技术的救助船对外消防培训仿真系统
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摘要
针对救助船消防训练中存在的海况复杂,对外消防炮射流受风影响大,往往无法准确控制其射向目标区域的问题,在理想状态下射流理论的基础上探究风对射流轨迹的影响,建立自然风条件下射流轨迹的数学模型,模拟对外消防炮射流的运动情况。应用3ds Max构建船舶模型,用Unity3D构建救助船在面临大风浪、遇险船着火等状况时对外消防系统的工作场景,提出一种精确构建粒子系统轨迹的方法,使射流模型能精确体现在场景中。通过虚拟现实设备能实现救助船对外消防培训仿真系统的立体显示和人机交互,起到更好的虚拟仿真和培训效果。
In the fire-fighting training of rescue ships under complex sea conditions,the water jet of external fire-fighting guns is influenced greatly by wind,so that it often can not control target area accurately. In view of the problem,the influence of wind on jet trajectories is analyzed based on the jet theory of the ideal state,and the mathematical model of the jet trajectory under the condition of natural wind is established to simulate the movement of water jet of external fire-fighting guns. The ship model is constructed by 3 ds Max. By Unity 3 D,the working scenes of the fire-fighting system of rescue ships under the conditions of large wind-wave and fire of ships in distress are constructed,and a method for accurately constructing the trajectory of the particle system is proposed,so that the jet model can be accurately shown in the scenes. The 3 D display and human-computer interaction of external fire-fighting training simulation system of rescue ships can be realized through virtual reality devices,which improve the effect of the virtual simulation and training.
In the fire-fighting training of rescue ships under complex sea conditions,the water jet of external fire-fighting guns is influenced greatly by wind,so that it often can not control target area accurately. In view of the problem,the influence of wind on jet trajectories is analyzed based on the jet theory of the ideal state,and the mathematical model of the jet trajectory under the condition of natural wind is established to simulate the movement of water jet of external fire-fighting guns. The ship model is constructed by 3 ds Max. By Unity 3 D,the working scenes of the fire-fighting system of rescue ships under the conditions of large wind-wave and fire of ships in distress are constructed,and a method for accurately constructing the trajectory of the particle system is proposed,so that the jet model can be accurately shown in the scenes. The 3 D display and human-computer interaction of external fire-fighting training simulation system of rescue ships can be realized through virtual reality devices,which improve the effect of the virtual simulation and training.
引文
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[2]孙健.消防炮射流轨迹的研究[D].上海:上海交通大学,2008.
[3] PRAKASH R S,SINHA A,TOMAR G,et al. Liquid jet in crossflow:effect of liquid entry conditions[J]. Experimental Thermal and Fluid Science,2018,93:45-56.
[4] XIA Yakang,KHEZZAR L,ALSHEHHI M,et al. Atomization of impinging opposed water jets interacting with an air jet[J]. Experimental Thermal and Fluid Science,2018,93:11-22. DOI:10. 1016/expthermflusci. 2017. 12. 012.
[5]陈卓,张晓磊,熊伟,等.救助船模拟器原型机关键技术研究[J].舰船科学技术,2016,38(11):114-117. DOI:10. 3404/j. issn. 1672-7619. 2016. 06. 023.
[6]陈卓.基于运动平台体感模拟的救助船模拟器研究[D].大连:大连海事大学,2016.
[7]张秀凤,尹勇,金一丞.规则波中船舶运动六自由度数学模型[J].交通运输工程报,2007,7(3):40-43.
[8]徐静,顾解忡,马宁.规则波六自由度回转运动预报[J].中国舰船研究,2014,9(3):20-27. DOI:10. 3969/j. issn. 1673-3185. 2014. 03.003.
[9]戚福洲.基于国标人体测量学数据的虚拟人建模技术研究[D].成都:西南交通大学,2014.
[10]李石磊,梁加红,吴冰,等.虚拟人运动生成与控制技术综述[J].系统仿真学报,2011,23(9):1758-1771.
[11]熊伟,王海涛,张会臣.救助工程[M].大连:大连海事大学出版社,2012:150-156.
[12]浦发.外弹道学[M].北京:国防工业出版社,1980:199.
[13] CHOPARD B,DROZ M. Cellular automata modeling of physical system[M]. Beijing:Tsinghua University Press,2003:13.
[14] KLUNDER G A,POST H N. The shortest path problem on large-scale real-road networks[J]. Networks,2010,48(4):182-194. DOI:10. 1002/net.