本文選題：統(tǒng)計能量法　切入點：布局優(yōu)化　出處：《上海交通大學》2015年碩士論文　論文類型：學位論文

【摘要】：2013年1月1日船舶效能設(shè)計指數(shù)(EEDI)正式生效,船舶設(shè)計開始面臨“綠色船舶”帶來的挑戰(zhàn)。今后的船舶設(shè)計不能僅僅考慮結(jié)構(gòu)的強度問題,還應(yīng)考慮諸如低排放、低能耗和振動噪聲舒適性能等因素,向環(huán)保型設(shè)計方向發(fā)展。在振動噪聲舒適性方面,船舶減振降噪設(shè)計技術(shù)受到普遍重視。國際海事組織(IMO)于2014年7月1日起采用新的更嚴格的艙室噪聲標準,隨著新的噪聲國際標準實施,船舶艙室聲學設(shè)計方法成為當前研究熱點。本文針對船舶設(shè)計流程中涉及到的船舶聲學設(shè)計內(nèi)容,研究了艙室聲學布局優(yōu)化設(shè)計理論、船舶結(jié)構(gòu)聲學設(shè)計理論與方法、船舶降噪聲學包配置優(yōu)化設(shè)計方法。首先研究了船舶概念設(shè)計及初步設(shè)計階段的艙室噪聲控制方法,即通過對艙室進行總體聲學布局優(yōu)化設(shè)計,根據(jù)各類艙室噪聲限值,合理布置船舶各功能艙室,使艙室降噪成本最低�；诖奥晫W布局優(yōu)化設(shè)計通用模型,本文給出解決船舶空間與艙室的匹配關(guān)系的兩種優(yōu)化方法。一是匈牙利法解法;二是基于排序不等式的準則法。對優(yōu)化算法進行了軟件實現(xiàn),并給出面積和位置等約束條件下的艙室聲學布局優(yōu)化算例。其次,在船舶詳細設(shè)計階段,基于統(tǒng)計能量方法,研究了船舶噪聲的傳遞途徑控制方法。通過將熱力學中的溫度和熵的概念擴展為統(tǒng)計能量框架下的聲振溫度和聲振熵,結(jié)合圖論研究了識別船舶艙室噪聲傳遞路徑的方法。將識別噪聲傳遞路徑問題轉(zhuǎn)化為K則最短路徑問題,以混合熵增率為權(quán),采用刪除邊算法搜索噪聲能量的主傳遞路徑。此方法能夠快速識別基于統(tǒng)計能量模型的船舶艙室噪聲主要傳遞路徑。采用聲學包降噪技術(shù)解決船舶艙室噪聲超標問題是未來發(fā)展的主流技術(shù)。聲學包是通過對結(jié)構(gòu)基體材料、吸聲/隔聲材料和阻尼材料的組合優(yōu)化設(shè)計,能完成預(yù)定降噪效果的聲學部件。本文在聲學布局優(yōu)化設(shè)計給定和識別出振動噪聲傳遞路徑的基礎(chǔ)上,利用聲學敏度與遺傳算法,研究聲學包布置優(yōu)化問題。該技術(shù)具有重要工程應(yīng)用價值,對于實現(xiàn)聲學包優(yōu)化設(shè)計工作的標準化及程序化,有效減少聲學包降噪成本,具有重要的作用。最后,綜合艙室聲學布局優(yōu)化理論、船舶噪聲能量傳遞路徑識別技術(shù)和聲學包降噪技術(shù),提出適用于大型船舶基于噪聲能量主傳遞路徑族的降噪設(shè)計通用流程,并根據(jù)上述理論開發(fā)了船舶艙室聲學優(yōu)化設(shè)計軟件。
[Abstract]:In January 1st 2013, the effectiveness Design Index (EEDI) of ships came into effect, and the design of ships began to face the challenge of "green ships". In the future, the design of ships should not only consider the strength of structures, but also take into account such as low emissions. Factors such as low energy consumption and comfort performance of vibration and noise have developed towards the direction of environment-friendly design. In terms of comfort of vibration and noise, The design technology of ship vibration and noise reduction has received widespread attention. The International Maritime Organization (IMO) adopted a new and more stringent cabin noise standard since July 1st 2014, and with the implementation of the new international noise standard, The method of ship compartment acoustic design has become a hot research topic at present. In this paper, the optimal design theory of cabin acoustic layout, the theory and method of ship structure acoustic design are studied in view of the ship acoustic design contents involved in the ship design process. The optimal design method of ship noise-reducing acoustic package configuration. Firstly, the noise control method of cabin in the phase of conceptual design and preliminary design of ship is studied, that is, by optimizing the overall acoustic layout of the cabin, according to the noise limit value of all kinds of cabin, According to the general model of ship acoustic layout optimization design, this paper presents two optimization methods to solve the matching relationship between ship space and cabin. The second is the criterion method based on ranking inequality. The optimization algorithm is implemented by software, and an example is given to optimize the acoustic layout of the cabin under constraints such as area and position. Secondly, in the detailed ship design stage, based on the statistical energy method, The transfer path control method of ship noise is studied. By extending the concepts of temperature and entropy in thermodynamics to the acoustic-vibration temperature and acoustic entropy under the statistical energy frame, Based on graph theory, the method of identifying the path of ship cabin noise transfer is studied. The problem of identifying the path of noise transfer is transformed into the problem of K shortest path, with mixed entropy increasing rate as the weight. The main transmission path of noise energy can be searched by deleting edge algorithm. This method can quickly identify the main path of ship cabin noise transmission based on statistical energy model. Acoustic packet noise reduction technique is used to solve the problem of ship cabin noise exceeding the standard. The problem is the mainstream technology in the future. The acoustic package is based on the structure of the matrix material, The optimal design of the combination of sound absorption / sound insulation materials and damping materials can complete the acoustic components with predetermined noise reduction effects. Based on the optimal design of acoustic layout and identification of vibration and noise transfer paths, acoustical acuity and genetic algorithm are used in this paper. This paper studies the optimization of acoustic packet layout. This technology has important engineering application value, and it is important to realize the standardization and programming of the optimization design of acoustic packet, and to reduce the cost of noise reduction of acoustic packet effectively. Finally, Based on the theory of cabin acoustic layout optimization, ship noise energy transfer path identification technology and acoustic packet noise reduction technology, a general process of noise reduction design for large ships based on the main path family of noise energy transfer is proposed. Based on the above theory, the software of acoustic optimum design of ship compartment is developed.
【學位授予單位】：上海交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U661.44;U662

【相似文獻】

相關(guān)碩士學位論文 前1條

1 高處;船舶艙室聲學優(yōu)化設(shè)計理論與方法研究[D];上海交通大學;2015年

，

本文編號：1630437