本文選題：薄板結(jié)構(gòu) + 低頻噪聲　； 參考：《南京航空航天大學(xué)》2016年碩士論文

【摘要】：隨著國(guó)家航空事業(yè)的發(fā)展,其航空器內(nèi)部的低頻噪聲問(wèn)題日益受到重視。壓電材料由于其良好的機(jī)電耦合特性和頻響特性,已被廣泛應(yīng)用于結(jié)構(gòu)振動(dòng)噪聲控制之中。在基于壓電材料的控制方法中,同步開關(guān)阻尼技術(shù)的半主動(dòng)振動(dòng)方法具有系統(tǒng)簡(jiǎn)單、控制效果穩(wěn)定、易于集成化的特點(diǎn),能夠滿足航天等領(lǐng)域?qū)Ω呖煽啃院洼p量化的要求,得到了廣泛的關(guān)注。本文基于同步開關(guān)阻尼半主動(dòng)噪聲控制方法,通過(guò)對(duì)結(jié)構(gòu)的目標(biāo)振動(dòng)模態(tài)的控制,降低了系統(tǒng)的低頻噪聲輻射,有效得提高了被控結(jié)構(gòu)的低頻隔聲性能。研究首先從薄板的聲輻射理論出發(fā),通過(guò)數(shù)值分析的方法分析了薄板系統(tǒng)的聲輻射聲性和系統(tǒng)的聲輻射模態(tài),從而確定了薄板結(jié)構(gòu)輻射低頻噪聲的主要結(jié)構(gòu)表面振速分布形式。其次,采用有限元分析軟件Abaqus分析了薄板結(jié)構(gòu)的振動(dòng)模態(tài),確定了驅(qū)動(dòng)器分布的位置。并且在有限元仿真軟件中實(shí)現(xiàn)了對(duì)結(jié)構(gòu)的半主動(dòng)振動(dòng)控制仿真,驗(yàn)證了半主動(dòng)控制方法在抑制表面目標(biāo)振速方面的有效性。最后,針對(duì)薄板結(jié)構(gòu)的隔聲問(wèn)題,搭建了半主動(dòng)噪聲控制系統(tǒng)。實(shí)驗(yàn)以單頻噪聲、混合雙頻和白噪聲三種激勵(lì)方式對(duì)結(jié)構(gòu)進(jìn)行激勵(lì),采用半主動(dòng)控制方法對(duì)三種激勵(lì)方式下的薄板輻射噪聲進(jìn)行控制。實(shí)驗(yàn)結(jié)果表明,系統(tǒng)能夠適應(yīng)各種激勵(lì)形式,并且控制算法簡(jiǎn)單,魯棒性較高,有效得提高了薄板結(jié)構(gòu)的低頻隔聲性能。本研究在內(nèi)容上擴(kuò)寬了同步開關(guān)阻尼技術(shù)的半主動(dòng)控制技術(shù)的應(yīng)用范圍。
[Abstract]:With the development of national aviation industry, the problem of low frequency noise in aircraft has been paid more and more attention. Piezoelectric materials have been widely used in structural vibration and noise control due to their good electromechanical coupling characteristics and frequency response characteristics. In the control method based on piezoelectric materials, the semi-active vibration method based on synchronous switch damping technology has the characteristics of simple system, stable control effect, easy integration, and can meet the requirements of high reliability and lightweight in aerospace and other fields. Got a lot of attention. Based on the synchronous switch damped semi-active noise control method, the low frequency noise radiation of the system is reduced by controlling the vibration mode of the target, and the low frequency sound insulation performance of the controlled structure is improved effectively. Based on the sound radiation theory of thin plate, the acoustic radiation characteristics of thin plate system and the sound radiation mode of thin plate system are analyzed by numerical analysis method, and the main surface vibration velocity distribution form of thin plate structure radiated low frequency noise is determined. Secondly, the vibration mode of thin plate structure is analyzed by finite element analysis software Abaqus, and the location of actuator distribution is determined. The semi-active vibration control simulation of the structure is realized in the finite element simulation software, which verifies the effectiveness of the semi-active control method in suppressing the vibration velocity of the surface target. Finally, a semi-active noise control system is built for the sound insulation of thin plate structure. In the experiment, single frequency noise, mixed double frequency and white noise are used to excite the structure, and semi-active control method is used to control the radiation noise of thin plate under three excitation modes. The experimental results show that the system can adapt to various excitation forms, and the control algorithm is simple, the robustness is high, and the low frequency sound insulation performance of thin plate structure is improved effectively. In this paper, the application of semi-active control technology of synchronous switch damping technology is broadened.
【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】：2016
【分類號(hào)】：TB535

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 魏健寧;李根梅;侯翠嶺;周利玲;;宏觀孔對(duì)金屬材料阻尼行為的影響及其阻尼機(jī)制研究[J];材料導(dǎo)報(bào);2015年10期

2 袁明;裘進(jìn)浩;季宏麗;周魏乙諾;姜金輝;;基于同位加速度負(fù)反饋的振動(dòng)主動(dòng)控制研究[J];振動(dòng).測(cè)試與診斷;2014年02期

3 林秀娟;周科朝;張曉泳;張斗;;壓電纖維復(fù)合材料的發(fā)展、模擬及應(yīng)用(英文)[J];Transactions of Nonferrous Metals Society of China;2013年01期

4 任惠娟;盛美萍;;矩形薄板的模態(tài)聲輻射效率[J];機(jī)械科學(xué)與技術(shù);2010年10期

5 扈西枝;;民機(jī)艙內(nèi)噪聲源及其特性分析[J];民用飛機(jī)設(shè)計(jì)與研究;2010年02期

6 侯志偉;陳仁文;徐志偉;劉強(qiáng);;壓電纖維復(fù)合材料在結(jié)構(gòu)減振中的應(yīng)用[J];振動(dòng)、測(cè)試與診斷;2010年01期

7 靳國(guó)永;楊鐵軍;劉志剛;;基于聲輻射模態(tài)的有源結(jié)構(gòu)聲傳入及其輻射控制[J];聲學(xué)學(xué)報(bào)(中文版);2009年03期

8 魏井君;邱志成;葉春德;;基于模糊控制的壓電撓性梁的振動(dòng)主動(dòng)控制實(shí)驗(yàn)研究[J];振動(dòng)與沖擊;2008年12期

9 季宏麗;裘進(jìn)浩;趙永春;朱孔軍;;基于壓電元件的半主動(dòng)振動(dòng)控制的研究[J];振動(dòng)工程學(xué)報(bào);2008年06期

10 黎勝,趙德有;結(jié)構(gòu)聲輻射的振動(dòng)模態(tài)分析和聲輻射模態(tài)分析研究[J];聲學(xué)學(xué)報(bào);2004年03期

，

本文編號(hào)：2095499