【摘要】：針對工程中普遍存在的薄板結(jié)構(gòu)振動(dòng)噪聲問題,提出了一種對加強(qiáng)筋位置分布進(jìn)行拓?fù)鋬?yōu)化的控制方法。通過有限元?jiǎng)恿W(xué)分析結(jié)構(gòu)的速度響應(yīng),代入由聲輻射模態(tài)推導(dǎo)的聲功率求解方程中得到聲功率。建立以加強(qiáng)筋位置作為設(shè)計(jì)變量的拓?fù)鋬?yōu)化數(shù)學(xué)模型,尋找聲功率最小的加筋分布。算法中以聲輻射模態(tài)靈敏度為指導(dǎo),確定拓?fù)鋬?yōu)化加筋的起始點(diǎn)和搜索過程。通過仿真計(jì)算結(jié)果表明,優(yōu)化得到的加筋布局能有效地將聲功率降低7.38dB,并討論了收斂準(zhǔn)則和不同頻率對加筋布局的影響,在第一階固有頻率內(nèi)都可用此種算法優(yōu)化。
[Abstract]:Aiming at the vibration and noise problem of thin plate structure in engineering, a topology optimization control method for the position distribution of stiffeners is proposed. The velocity response of the structure is analyzed by finite element dynamics, and the sound power is obtained by replacing the acoustic power equation derived from the acoustic radiation mode. A mathematical model of topology optimization with reinforcement position as design variable is established to find the reinforcement distribution with the smallest sound power. Under the guidance of acoustic radiation mode sensitivity, the starting point and searching process of topology optimization reinforcement are determined. The simulation results show that the optimized stiffened layout can effectively reduce the sound power by 7.38 dB, and discuss the convergence criterion and the influence of different frequencies on the stiffened layout, which can be optimized in the first order natural frequency.
【作者單位】： 江蘇大學(xué)振動(dòng)噪聲研究所;
【分類號】：TB535

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