本文選題：激光防護(hù)　切入點(diǎn)：數(shù)值模擬　出處：《南京航空航天大學(xué)》2017年碩士論文

【摘要】：隨著激光武器技術(shù)的飛速發(fā)展,對(duì)激光防護(hù)技術(shù)的要求也在不斷提高,這極大地促進(jìn)了激光防護(hù)技術(shù)的發(fā)展與進(jìn)步。目前,利用基于非線性光學(xué)原理的光限幅技術(shù)來實(shí)現(xiàn)激光防護(hù)是研究的最多、最有應(yīng)用前景的技術(shù)途徑之一,在對(duì)高強(qiáng)激光防護(hù)方面起著至關(guān)重要的作用。基于碳納米粒子懸浮液的非線性光散射效應(yīng)的防護(hù)技術(shù)就是其中的一種防護(hù)方法。本論文以碳納米管和碳納米粉的水和乙醇懸浮液為研究對(duì)象,基于熱傳導(dǎo)理論和等效球的米散射理論,對(duì)懸浮液的光限幅過程進(jìn)行了數(shù)值模擬,研究了懸浮液厚度、濃度、溶劑種類及入射光波長(zhǎng)等因素對(duì)其限幅性能的影響;對(duì)影響其限幅性能的各因素進(jìn)行了實(shí)驗(yàn)驗(yàn)證,并結(jié)合非線性光限幅原理對(duì)其進(jìn)行了分析;同時(shí)為獲得穩(wěn)定的懸浮液,對(duì)碳納米管在水中的分散性能進(jìn)行了實(shí)驗(yàn)研究。論文的主要研究?jī)?nèi)容和成果如下:1.碳納米粒子懸浮液光限幅性能的數(shù)值模擬。在光限幅過程中,基于熱傳導(dǎo)方程和米散射理論對(duì)懸浮液中微氣泡的形成、散射相位特性、散射系數(shù)及透過率進(jìn)行了數(shù)值模擬,對(duì)懸浮液的厚度、濃度、溶劑種類及入射光波長(zhǎng)等影響其限幅性能的因素進(jìn)行了數(shù)值模擬,獲得了懸浮液的限幅特性與這些因素的關(guān)系,為后續(xù)實(shí)驗(yàn)提供指導(dǎo)。2.對(duì)碳納米管在水相介質(zhì)中的分散性能進(jìn)行了研究。綜合利用了單因素實(shí)驗(yàn)和正交實(shí)驗(yàn)方法,探討了超聲時(shí)間、分散劑種類、分散劑濃度和pH值對(duì)碳納米管在水相介質(zhì)中分散性能的影響,并對(duì)其進(jìn)行了分析,得到了分散的最優(yōu)參數(shù),配制出了分散效果良好的穩(wěn)定懸浮液,為后續(xù)光限幅效果的實(shí)驗(yàn)研究奠定了基礎(chǔ)。3.分別對(duì)碳納米管和碳納米粉的水及乙醇懸浮液的光限幅性能進(jìn)行了實(shí)驗(yàn)研究,分析懸浮液的厚度、濃度、容器壁厚、粒子種類、溶劑種類、入射光波長(zhǎng)及重復(fù)頻率對(duì)其光限幅性能的影響。相同厚度下,分別對(duì)相同濃度和不同濃度的碳納米粉和碳納米管懸浮液進(jìn)行組合時(shí)的限幅效果進(jìn)行實(shí)驗(yàn)研究。用透光率來描述懸浮液的限幅效果,獲得了限幅效果較好的懸浮液參數(shù)。
[Abstract]:With the rapid development of laser weapon technology, the requirements of laser protection technology are also increasing, which greatly promotes the development and progress of laser protection technology.At present, using optical limiting technology based on nonlinear optical principle to realize laser protection is one of the most studied and promising technical approaches, which plays an important role in the field of high-strength laser protection.The protection technology based on the nonlinear light scattering effect of carbon nanoparticles suspension is one of the protective methods.In this paper, the optical limiting process of carbon nanotubes and carbon nanoparticles was numerically simulated based on the heat conduction theory and the equivalent sphere scattering theory, and the thickness and concentration of the suspensions were studied, taking the water and ethanol suspensions of carbon nanotubes and carbon nanoparticles as the research objects.The effects of solvent types and incident light wavelength on the limiting performance are verified by experiments, and the nonlinear optical limiting principle is analyzed. In order to obtain a stable suspension,The dispersion of carbon nanotubes in water was studied experimentally.The main contents and results of this thesis are as follows: 1.Numerical simulation of optical limiting performance of carbon nanoparticles suspension.In the optical limiting process, the formation, scattering phase, scattering coefficient and transmittance of microbubbles in suspension are numerically simulated based on heat conduction equation and meter scattering theory.The effects of solvent type and incident light wavelength on the limiting performance of the suspension were numerically simulated. The relationship between the limiting characteristics of the suspension and these factors was obtained, which provides guidance for further experiments.The dispersion properties of carbon nanotubes in aqueous media were studied.The effects of ultrasonic time, type of dispersant, concentration of dispersant and pH value on the dispersion properties of carbon nanotubes in aqueous medium were studied by using single factor experiment and orthogonal experiment.The optimal dispersion parameters were obtained, and the stable suspension with good dispersion effect was prepared, which laid a foundation for the experimental study of the optical limiting effect.The optical limiting properties of water and ethanol suspensions of carbon nanotubes and carbon nanoparticles were studied experimentally. The thickness, concentration, wall thickness, particle types, solvent types of the suspensions were analyzed.The influence of incident wavelength and repetition frequency on the optical limiting performance.At the same thickness, the limiting effect of carbon nanoparticles and carbon nanotube suspensions with the same concentration and different concentration were studied experimentally.The limiting effect of suspension was described by the transmittance, and the better suspension parameters were obtained.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TQ127.11;TB383.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王彩麗;牛燕雄;崔云霞;;碳納米顆粒懸浮液光限幅性能理論分析和數(shù)值模擬[J];紅外與激光工程;2012年05期

2 馬傳國(guó);于英俊;張鵬;;碳納米管的表面修飾及其對(duì)環(huán)氧樹脂熱性能的影響[J];中國(guó)塑料;2009年01期

3 李海淼;郭興忠;朱瀟怡;楊輝;高黎華;;TMAH對(duì)TiN納米粉體分散行為的影響[J];無機(jī)化學(xué)學(xué)報(bào);2008年03期

4 葉結(jié)松;朱岳超;;淺析激光對(duì)抗及其發(fā)展趨勢(shì)[J];紅外與激光工程;2007年S2期

5 宋曉嵐,王海波,吳雪蘭,曲鵬,邱冠周;納米顆粒分散技術(shù)的研究與發(fā)展[J];化工進(jìn)展;2005年01期

6 張鵬,牛燕雄,郭志新,姚建銓;碳納米管在光限幅中的應(yīng)用[J];激光與光電子學(xué)進(jìn)展;2004年11期

7 鄭嬋,鄒春林,詹紅兵,陳文哲;納米碳管復(fù)合固態(tài)光限幅材料的制備及性能研究[J];中國(guó)陶瓷;2004年03期

8 賈曉林,譚偉;納米粉體分散技術(shù)發(fā)展概況[J];非金屬礦;2003年04期

9 付偉;激光防護(hù)技術(shù)的發(fā)展現(xiàn)狀[J];應(yīng)用光學(xué);2000年03期

10 施德恒,許啟富;基于非線性光學(xué)理論的激光防護(hù)材料近況[J];光學(xué)技術(shù);2000年01期

相關(guān)碩士學(xué)位論文 前2條

1 付美玲;基于SBS光限幅器的控制和改進(jìn)方法的研究[D];哈爾濱工業(yè)大學(xué);2010年

2 駱永全;寬帶光限幅器限幅行為和機(jī)理研究[D];中國(guó)工程物理研究院;2006年

，

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