本文選題：艦船目標(biāo) + 實時性��； 參考：《哈爾濱工業(yè)大學(xué)》2014年碩士論文

【摘要】：航空母艦作為現(xiàn)代化海上戰(zhàn)爭的重要工具，，其紅外輻射特性的研究已成為國內(nèi)外相關(guān)軍事領(lǐng)域的重要課題。近年來，已有一些國內(nèi)學(xué)者針對海面艦船目標(biāo)的紅外輻射特性進行了研究，但大部分仿真結(jié)果都局限于穩(wěn)態(tài)，并不能適應(yīng)現(xiàn)代化戰(zhàn)爭的實時性要求；再者，海洋環(huán)境下的氣象條件是復(fù)雜多變的，這一點對于艦船溫度場的影響是很大的。如果所建立的模型并沒有充分考慮這些氣象參數(shù)（風(fēng)速、環(huán)境溫度、洋面溫度）的實時性變化，那么仿真得到的結(jié)果與實際情況難免會有所差別。 本文針對海面艦船進行建模，考慮外界氣象參數(shù)的實時性變化，求取了艦船目標(biāo)的非穩(wěn)態(tài)溫度場及紅外輻射場。主要工作分為以下三個部分： (1)艦船目標(biāo)的幾何建模及相關(guān)數(shù)據(jù)文件的導(dǎo)出 使用Auto-CAD軟件建立了艦船目標(biāo)的三維幾何模型，并將其導(dǎo)入到ANSYS有限元軟件中完成對模型的修正及表面網(wǎng)格的劃分。進一步，將網(wǎng)格數(shù)據(jù)文件導(dǎo)出，并運用蒙特卡羅法完成對面元與面元間、面元與海面間、面元與天空間的角系數(shù)或輻射傳遞因子的計算。 (2)求解艦船目標(biāo)的非穩(wěn)態(tài)及穩(wěn)態(tài)溫度場 分別模擬了太陽、天空及海面等背景對于艦船目標(biāo)的輻射換熱，把這些外部熱源項疊加為整體的熱源項，并考慮了內(nèi)熱源的作用、外部對流換熱的作用、面元間橫向?qū)岬淖饔�、面元與面元間多重反射的作用、面元與面元間輻射換熱的作用等，建立了面元的能量守恒方程。利用隱式迭代格式，求解出艦船目標(biāo)的瞬時非穩(wěn)態(tài)溫度場，并進一步求出某時某刻的穩(wěn)態(tài)溫度場。在此基礎(chǔ)上，提出了兩種反演艦船目標(biāo)溫度場的方法。 (3)艦船目標(biāo)的紅外熱成像 利用OpenGL圖形庫的遮擋函數(shù)來確定艦船目標(biāo)的有效輻射面元，從而對艦船目標(biāo)進行不同方位的點源輻射亮度計算。此外，采用網(wǎng)格裁剪法改進了傳統(tǒng)的蒙特卡羅法成像的斑駁性，獲得了能反映出艦船表面溫度分布的清晰熱像圖。最后，考慮海面背景的重要性，運用簡化的經(jīng)驗?zāi)Ｐ蛠砟M海面的紅外輻射特性，對加入海面視場的艦船目標(biāo)成像進行了初步探索。
[Abstract]:As an important tool of modern naval warfare, the research on infrared radiation characteristics of aircraft carrier has become an important subject in the military field. In recent years, some domestic scholars have studied the infrared radiation characteristics of sea surface ship targets, but most of the simulation results are confined to the steady state, which can not meet the real-time requirements of modern warfare. The meteorological conditions in the marine environment are complex and changeable, which has a great influence on the temperature field of ships. If the real time variation of these meteorological parameters (wind speed, ambient temperature, ocean surface temperature) is not fully taken into account in the established model, the simulation results will inevitably be different from the actual situation. In this paper, the unsteady temperature field and infrared radiation field of ship target are obtained by taking into account the real time change of external meteorological parameters. The main work is divided into the following three parts: 1) geometric modeling of ship target and the derivation of related data files. The 3D geometric model of ship target is established by using Auto-CAD software. The model is modified and the surface mesh is divided into ANSYS finite element software. Furthermore, the grid data file is exported, and Monte Carlo method is used to complete the interface between the opposite element and the surface, and between the surface and the sea. The calculation of the angular coefficient or radiative transfer factor between plane and space. The unsteady and steady-state temperature fields of ship target are solved. The radiative heat transfer from the sun, sky and sea surface to the ship target is simulated, respectively. These external heat sources are superposed as the whole heat source terms, and the effects of internal heat sources, external convection heat transfer, transverse heat conduction between surfaces, and multiple reflections between surfaces are taken into account. The energy conservation equation of a plane is established by the effect of radiation heat transfer between a plane and a plane. The transient unsteady temperature field of ship target is solved by implicit iterative scheme, and the steady state temperature field at a certain time is further obtained. On the basis of this, two methods of retrieving the temperature field of ship target are put forward. 3) the infrared thermal imaging of ship target uses the blocking function of OpenGL graphics library to determine the effective radiation surface element of ship target. Therefore, the radiance of point source in different azimuth of ship target is calculated. In addition, the mottling of the traditional Monte Carlo imaging is improved by using the mesh clipping method, and a clear thermal image which can reflect the surface temperature distribution of the ship is obtained. Finally, considering the importance of sea surface background, a simplified empirical model is used to simulate the infrared radiation characteristics of the sea surface.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U674.771

【參考文獻】

相關(guān)期刊論文 前10條

1 婁樹理;董言治;周曉東;;基于OpenGL的艦船目標(biāo)紅外圖像生成[J];彈箭與制導(dǎo)學(xué)報;2007年05期

2 婁樹理;周曉東;;各向異性粗糙海面的紅外反射特性研究[J];光散射學(xué)報;2011年03期

3 王曉島;艦船排氣裝置紅外輻射密度分布的數(shù)值預(yù)測[J];上海機械學(xué)院學(xué)報;1994年02期

4 高蘭香,沈國土,楊寶成,蔡繼光;熱像理論建模中的厚殼船體效應(yīng)研究[J];華東師范大學(xué)學(xué)報(自然科學(xué)版);2003年01期

5 姜瑾,沈國土,楊寶成,蔡繼光;海面3-5微米紅外熱像的模擬[J];華東師范大學(xué)學(xué)報(自然科學(xué)版);2003年04期

6 于龍;紅外成像儀用于探潛技術(shù)的研究[J];紅外;2004年04期

7 沈國土,楊寶成,蔡繼光,高蘭香,高景,朱文勇,夏樟根;具有厚殼結(jié)構(gòu)的海面目標(biāo)紅外熱像模擬[J];紅外與毫米波學(xué)報;2003年02期

8 朱文勇,高景,粟鵬義,黎學(xué)文,嚴(yán)瑗;改進單元法在紅外模擬熱像中的應(yīng)用[J];紅外與毫米波學(xué)報;1996年03期

9 朱文勇,高景,周剛慧,陳英禮,楊寶成,沈國土;艦船紅外成像模擬[J];紅外與毫米波學(xué)報;1998年02期

10 楊寶成,沈國土,毛宏霞,高蘭香,洪鎮(zhèn)青,朱文勇,高景;海面目標(biāo)紅外輻射場的理論模擬和計算軟件[J];計算物理;2001年03期

本文編號：2017249