本文選題：浮筏隔振系統(tǒng) + 拓?fù)鋬?yōu)化��； 參考：《南京航空航天大學(xué)》2014年碩士論文

【摘要】：船舶結(jié)構(gòu)的動(dòng)力系統(tǒng)由于其自身工作特性,會(huì)產(chǎn)生較為強(qiáng)烈的振動(dòng)和噪聲輻射,這對(duì)船上工作人員的工作環(huán)境和艦船隱身都有非常負(fù)面的影響。為了解決這一問(wèn)題,國(guó)內(nèi)外艦船的機(jī)械設(shè)備很多都采用了在基礎(chǔ)上增加浮筏隔振的設(shè)計(jì)方案,并取得了良好的隔振效果。本文主要通過(guò)優(yōu)化的手段設(shè)計(jì)了一種新型的浮筏隔振系統(tǒng)。首先對(duì)傳統(tǒng)浮筏隔振系統(tǒng)的設(shè)計(jì)經(jīng)驗(yàn)進(jìn)行總結(jié),比較了幾種評(píng)價(jià)隔振系統(tǒng)隔振效率的方法。然后通過(guò)拓?fù)鋬?yōu)化的方法對(duì)浮筏結(jié)構(gòu)進(jìn)行概念設(shè)計(jì),通過(guò)對(duì)優(yōu)化結(jié)果的分析總結(jié)出了一種上下層隔振器傾斜放置、被隔振設(shè)備之間增加傳力構(gòu)件的新型浮筏結(jié)構(gòu)。進(jìn)而搭建結(jié)構(gòu)參數(shù)優(yōu)化平臺(tái),以浮筏結(jié)構(gòu)傳遞到基礎(chǔ)上的功率流之和最小為優(yōu)化目標(biāo),以被隔振發(fā)動(dòng)機(jī)的當(dāng)量振動(dòng)烈度和浮筏結(jié)構(gòu)的疲勞壽命、靜力學(xué)應(yīng)力和位移、動(dòng)力學(xué)應(yīng)力和位移為約束條件,對(duì)新型浮筏系統(tǒng)進(jìn)行參數(shù)優(yōu)化設(shè)計(jì)。為了探究新型浮筏結(jié)構(gòu)的優(yōu)越性,將新型浮筏結(jié)構(gòu)的優(yōu)化結(jié)果和傳統(tǒng)浮筏結(jié)構(gòu)在相同工況下的優(yōu)化結(jié)果進(jìn)行對(duì)比,發(fā)現(xiàn)新型浮筏結(jié)構(gòu)除當(dāng)量振動(dòng)烈度較傳統(tǒng)構(gòu)型高以外,其他考察指標(biāo)均優(yōu)于傳統(tǒng)浮筏構(gòu)型。這一結(jié)果表明本文設(shè)計(jì)的浮筏結(jié)構(gòu)對(duì)結(jié)構(gòu)能量傳遞的引導(dǎo)作用優(yōu)于傳統(tǒng)結(jié)構(gòu),而且具有較好的耐久性。
[Abstract]:The dynamic system of ship structure will produce strong vibration and noise radiation due to its own working characteristics, which has a very negative impact on the working environment of the crew on board and the stealth of the ship. In order to solve this problem, many mechanical equipments of ships at home and abroad have adopted the design scheme of adding floating raft vibration isolation on the basis, and achieved good vibration isolation effect. In this paper, a new floating raft vibration isolation system is designed by means of optimization. Firstly, the design experience of the traditional floating raft vibration isolation system is summarized, and several methods to evaluate the isolation efficiency of the vibration isolation system are compared. Then the conceptual design of floating raft structure is carried out by topology optimization method, and a new type of floating raft structure is concluded by analyzing the results of optimization. A new type of floating raft structure, which is inclined to place the upper and lower layer isolators and increases the force transfer members between the isolating devices, is proposed. Then the optimization platform of structural parameters is built, the minimum sum of power flow transferred to the floating raft structure is taken as the optimization objective, and the equivalent vibration intensity of the isolated engine and the fatigue life, static stress and displacement of the floating raft structure are taken as the optimization objectives. The dynamic stress and displacement are the constraint conditions, and the parameter optimization design of the new floating raft system is carried out. In order to explore the superiority of the new floating raft structure, the optimization results of the new type floating raft structure are compared with those of the traditional floating raft structure under the same working conditions. It is found that the new floating raft structure has higher equivalent vibration intensity than the traditional one. The other indexes are superior to the conventional floating raft configuration. The results show that the floating-raft structure designed in this paper can guide the energy transfer of the structure better than the traditional structure and has better durability.
【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】：2014
【分類(lèi)號(hào)】：TB535.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 尚國(guó)清,邱伯華;關(guān)于浮筏系統(tǒng)的動(dòng)力學(xué)建模分析[J];艦船科學(xué)技術(shù);1999年04期

2 盛美萍,王敏慶,孫進(jìn)才;浮筏隔振系統(tǒng)統(tǒng)計(jì)分析[J];西北工業(yè)大學(xué)學(xué)報(bào);1999年04期

，

本文編號(hào)：1950090