Modeling And Simulation Of Radiation Characteristics Of Infrared Stealth Ship

Nowadays,with the rapid development of naval equipment in the world,stealth ships have become the main combat power of naval fleets.Based on a variety of stealth means,stealth ship reduces the difference between imaging and background imaging under the detection of anti-ship weapons.Due to the difference of emissivity of surface materials,the surface radiation composition of stealth ships is different from that of ordinary ships.The change of optical properties makes the reflected radiation become the focus of radiation control of stealth ships.Through the modeling and Simulation of stealth ships under different detection conditions and environmental conditions,this paper studies the ships under the combined action of various infrared stealth technologies,which can provide support for the infrared detection and anti detection of ships.Therefore,the research contents of this paper are as follows:(1)Through the theoretical modeling of the marine environment radiation,based on the ocean surface emissivity and reflectivity model,the influence of the white cap foam belt on the optical properties is analyzed,and the radiation characteristics are corrected by statistical experimental data.Based on the statistics of seasonal and daily variation of sea surface temperature,the intrinsic radiation model is built by relying on emissivity.The solar and sky radiation is calculated by MODTRAN,and the radiation energy emitted by the ocean surface in the form of reflection is obtained.During the last stage of radiation transmission,the atmospheric effect is calculated by using MODTRAN software,and the radiation model of marine environment is completed.(2)The 3D model of ship is established by 3dsmax.Based on the data of temperature field and emissivity of different materials,the intrinsic radiation model of ship is established.According to the surface radiation of stealth ship,Schlick model is used to describe the surface reflected radiation of stealth ship.So the change of surface radiation proportion can be analyzed.(3)Based on Mie scattering theory,the extinction and scattering coefficients of water mist are calculated.The attenuation of water mist is described by extinction cross section and Lambert Beer’s law.The corresponding parameters of concentration,fog radius and transmittance are achieved.Through the calculation of albedo,combined with the radiation of sky,sunlight and sea surface,the radiation transfer model of stealth ship under the action of water mist is established,and compared with ordinary ship,the special value of water mist to stealth ship is expounded.(4)Based on OGRE open source rendering engine and Direct X underlying interface script,the simulation platform is set up,and CG script program is written to complete the rendering and display of radiation feature model.Using particle system to complete the dynamic simulation effect of water mist,the transmittance of water mist and the radiance of water mist area are accurately corresponding to the transparency and gray color value of water mist texture,and the radiation characteristics of water mist are quantitatively described.In addition,the stealth ship under different detection conditions is simulated by coupling the external environment radiation,and the better detection method of stealth ship is discussed.Finally,the simulation of water mist with different parameters and different environments is carried out to study the change of radiation characteristics of stealth ship under different seasons,times and wind speeds,and the radiation link modeling of stealth ship is completed.The modeling and Simulation of stealth ship in this paper can quantify the radiation characteristics of stealth ship in the marine environment more accurately,show the difference of actual radiation values in different environments more realistically,and provide more powerful power for the development of detection and anti detection technology of stealth ship.