【摘要】：薄板結(jié)構(gòu)中,傳統(tǒng)大塊敷設(shè)阻尼雖然能提高隔聲量,但不利于輕量化設(shè)計(jì),因此提出二維周期阻尼敷設(shè)方式,借助有限元法及VA one聲學(xué)仿真軟件,分析二維周期塊狀阻尼分布、形狀等參數(shù)對(duì)薄板隔聲特性的影響。結(jié)果表明,隨著阻尼數(shù)目的增加,在16~125Hz和250~1 000 Hz頻段內(nèi),6塊阻尼敷設(shè)方式隔聲量最小;全頻段范圍內(nèi),x、y方向晶格常數(shù)均為100mm時(shí),隔聲量最小。因此,在特定頻段內(nèi),合理調(diào)整周期阻尼結(jié)構(gòu)的晶格常數(shù)及阻尼數(shù)目能使隔聲量達(dá)到最大;二維周期阻尼形狀對(duì)隔聲量有較大的影響,對(duì)于圓、正三角形及矩形三種特定的阻尼形狀而言,圓形阻尼形狀隔聲效果最優(yōu)。
[Abstract]:In thin plate structure, although the traditional large block laying damping can improve the sound insulation, but it is not conducive to lightweight design, so the two-dimensional periodic damping laying mode is put forward, and the two-dimensional periodic block damping distribution is analyzed with the help of finite element method and VA one acoustic simulation software. The influence of shape and other parameters on the sound insulation characteristics of thin plates. The results show that with the increase of damping number, the sound insulation of six damping laying modes is the smallest in the frequency range of 16~125Hz and 250 鈮，

本文編號(hào)：2491279