海面艦船尾跡仿真與電磁計(jì)算
[Abstract]:With the rapid development of ocean remote sensing and radar detection and tracking technology, more and more attention has been paid to the detection of sea surface and sea targets, especially the detection of sea surface ships has become the main content of ocean research. It is difficult to detect the ship target in the actual complex ocean background, so it is one of the important research directions to retrieve the ship target information from the ship wakes in the ocean target detection. In this paper, the Kelvin wake, two-dimensional linear and nonlinear sea surface of a ship are simulated. The Kelvin wake of a ship under the ocean background is studied, and the corresponding electromagnetic scattering calculation is carried out at the end of the paper. The main contents of this paper are divided into three parts: sea surface modeling, ship Kelvin wake modeling and electromagnetic scattering calculation of sea surface and ship Kelvin wake. Firstly, several methods of sea surface modeling are described, the method based on sea wave spectrum is selected, and the commonly used wave spectrum is given. Using linear superposition method and linear filtering method, the two-dimensional linear sea surface with different wind speeds and different wind directions is simulated. Considering the nonlinearity of the actual sea surface, a common method of nonlinear sea surface modeling is introduced. That is, the CWM model (Choppy Wave Model), uses the results of the linear sea surface to obtain the nonlinear sea surface with different wind speeds. The results are compared with the corresponding linear sea surface, which is consistent with the real sea surface characteristics. Secondly, the most common Kelvin wake in warship wake is simulated by selecting a suitable ship model, and the Kelvin wake results under different parameters are obtained. Combined with the simulation results of Kelvin wake, the factors affecting the wake are compared and analyzed. Then it is superimposed on the simulated linear and nonlinear sea surface, and the Kelvin wake on the linear and non-linear sea surface is obtained, and the wind speed of the sea surface and the ship's velocity are changed. The Kelvin wakes of ships with different wind speeds and different ship speeds are obtained, and the results are analyzed. The fact that the wake with low ship speed is easily annihilated under high sea conditions is obtained. Finally, the dielectric constants of seawater at different radar incident frequencies are calculated by using the Debye formula. Considering the characteristics of the simulated sea surface in this paper, the Kirchhoff approximation method is used to calculate the electromagnetic scattering of the electrically large sea surface, and different wind speeds and different wind directions are obtained. The distribution of sea surface electromagnetic scattering coefficient with radar wave incidence angle, scattering angle, incident azimuth angle and scattering azimuth angle under different frequency of incident wave and different polarization modes is analyzed. On this basis, the linear and nonlinear sea surface of Kelvin wake superimposed with different ship velocities are calculated by electromagnetic scattering. The effects of wind speed, wind direction and ship velocity on their backscattering are obtained.
【學(xué)位授予單位】:西安電子科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:U674.70
【參考文獻(xiàn)】
相關(guān)期刊論文 前9條
1 陳麗寧;金一丞;任鴻翔;;海浪實(shí)時(shí)繪制中波浪譜的選擇[J];圖學(xué)學(xué)報(bào);2014年02期
2 聶丁;張民;;An angular cutoff composite model for investigation on electromagnetic scattering from two-dimensional rough sea surfaces[J];Chinese Physics B;2010年07期
3 張效慈;潛艇內(nèi)波尾跡物理場(chǎng)在海面映波量值的確定[J];船舶力學(xué);2005年04期
4 李廣鑫,丁振國(guó),詹海生,周利華;一種面向虛擬環(huán)境的真實(shí)感水波面建模算法[J];計(jì)算機(jī)研究與發(fā)展;2004年09期
5 劉歷博,肖景明,吳振森,張忠治;未充分生成海的海面模型及其雷達(dá)散射系數(shù)[J];西安電子科技大學(xué)學(xué)報(bào);2001年03期
6 鄢來斌,李思昆,張秀山;虛擬海戰(zhàn)場(chǎng)景中的海浪實(shí)時(shí)建模與繪制技術(shù)研究[J];計(jì)算機(jī)研究與發(fā)展;2001年05期
7 陳前華,鄧建松,陳發(fā)來;滴水漣漪的計(jì)算機(jī)動(dòng)畫模擬[J];計(jì)算機(jī)研究與發(fā)展;2001年05期
8 楊勁松,黃韋艮,周長(zhǎng)寶,傅斌,史愛琴,厲冬玲;合成孔徑雷達(dá)圖像的近岸海面風(fēng)場(chǎng)反演[J];遙感學(xué)報(bào);2001年01期
9 郭立新,吳振森;二維導(dǎo)體粗糙面電磁散射的分形特征研究[J];物理學(xué)報(bào);2000年06期
相關(guān)博士學(xué)位論文 前6條
1 孫榮慶;海面艦船尾跡電磁散射研究[D];西安電子科技大學(xué);2013年
2 陳琿;動(dòng)態(tài)海面及其上目標(biāo)復(fù)合電磁散射與多普勒譜研究[D];西安電子科技大學(xué);2012年
3 聶丁;動(dòng)態(tài)海面電磁散射與多普勒譜研究[D];西安電子科技大學(xué);2012年
4 王虹現(xiàn);ISAR成像新方法研究[D];西安電子科技大學(xué);2011年
5 王運(yùn)華;海面及其與上方簡(jiǎn)單目標(biāo)的復(fù)合電磁散射研究[D];西安電子科技大學(xué);2006年
6 姚紀(jì)歡;粗糙海面的電磁散射研究[D];西安電子科技大學(xué);2000年
相關(guān)碩士學(xué)位論文 前9條
1 杜充;艦船尾跡建模與其相關(guān)電磁方法研究[D];電子科技大學(xué);2013年
2 陳靜;低空運(yùn)動(dòng)目標(biāo)與粗糙海面復(fù)合散射研究[D];安徽大學(xué);2012年
3 葉文華;不同海情海面與目標(biāo)復(fù)合電磁散射理論與實(shí)驗(yàn)研究[D];西安電子科技大學(xué);2012年
4 李大釗;海面紅外輻射與散射特性研究[D];西安電子科技大學(xué);2012年
5 趙蕾;海面上方簡(jiǎn)單目標(biāo)復(fù)合電磁散射特性研究[D];西安電子科技大學(xué);2008年
6 何志華;海面建模、成像與順軌干涉研究[D];國(guó)防科學(xué)技術(shù)大學(xué);2007年
7 林風(fēng);粗糙海面電磁波散射與雜波特性分析[D];西安電子科技大學(xué);2007年
8 石賤弟;虛擬海洋環(huán)境仿真研究[D];西安電子科技大學(xué);2006年
9 劉歷博;粗糙海面的電磁特性研究[D];西安電子科技大學(xué);2001年
,本文編號(hào):2443247
本文鏈接:http://sikaile.net/kejilunwen/chuanbolw/2443247.html