本文選題：結(jié)構(gòu)聲學(xué)　切入點(diǎn)：優(yōu)化設(shè)計(jì)　出處：《船舶力學(xué)》2016年08期 　論文類型：期刊論文

【摘要】：研究艙段結(jié)構(gòu)振動(dòng)、聲輻射特性隨分艙形式改變的變化規(guī)律,對潛艇結(jié)構(gòu)聲學(xué)優(yōu)化設(shè)計(jì)具有十分重要的意義。從結(jié)構(gòu)聲學(xué)設(shè)計(jì)的角度出發(fā),在保持相鄰兩個(gè)艙段總長度不變的情況下,調(diào)整兩個(gè)艙段的長度,采用結(jié)構(gòu)有限元法、結(jié)構(gòu)有限元耦合流體邊界元方法,以輻射聲功率、濕表面均方法向速度和輻射效率作為衡量結(jié)構(gòu)噪聲輻射能力的主要衡量指標(biāo),系統(tǒng)地研究整個(gè)結(jié)構(gòu)振動(dòng)和聲輻射特性。在流體部分的計(jì)算中,采用網(wǎng)格重疊算法,以提高計(jì)算效率。通過調(diào)整分艙形式,在一定頻段,改變了整個(gè)艙段結(jié)構(gòu)振動(dòng)聲學(xué)傳遞函數(shù)的譜峰頻率,降低了譜峰幅值,因此,可以通過改變分艙形式以改變艙段結(jié)構(gòu)聲學(xué)特性,使設(shè)備激振力的譜峰頻率與結(jié)構(gòu)振動(dòng)聲學(xué)傳遞函數(shù)的譜峰頻率錯(cuò)開,實(shí)現(xiàn)對輻射噪聲的控制。
[Abstract]:It is very important to study the variation of the vibration and acoustic radiation characteristics of the cabin structure with the subdivision form, which is of great significance to the optimization design of the submarine structure, from the point of view of the structural acoustic design, Under the condition of keeping the total length of the adjacent two segments unchanged, the length of the two segments is adjusted, and the structural finite element method and the structural finite element coupled fluid boundary element method are used to radiate sound power. The velocity and radiation efficiency of the wet surface averaging method are used as the main indexes to measure the radiation capacity of the structure noise. The vibration and acoustic radiation characteristics of the whole structure are systematically studied. In the calculation of the fluid part, the mesh overlap algorithm is used. In order to improve the calculation efficiency, by adjusting the form of subdivision, in a certain frequency range, the spectrum peak frequency of acoustic transfer function of vibration of the whole cabin structure is changed, and the amplitude of spectrum peak is reduced. By changing the subdivision form to change the acoustic characteristics of the cabin structure, the spectrum peak frequency of the excitation force of the equipment and the spectrum peak frequency of the acoustic transfer function of the structural vibration can be staggered to realize the control of the radiated noise.
【作者單位】： 海軍工程大學(xué)艦船工程系;
【基金】：*****演示驗(yàn)證項(xiàng)目(*2011001/101)
【分類號】：U661.44
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本文編號：1575007