【摘要】：依據(jù)聲子晶體的局域共振機(jī)理提出了一種三組元板狀周期柵格結(jié)構(gòu)。利用有限元法分析計算了這種新型柵格結(jié)構(gòu)的色散關(guān)系和特征模態(tài)的位移場。由能帶結(jié)構(gòu)圖和振動傳遞的有限元仿真結(jié)果可知,柵格結(jié)構(gòu)擁有多個方向的低頻振動帶隙。局域共振帶隙是由行進(jìn)波和振子的共振相互作用產(chǎn)生的。以第一個彎曲振動帶隙為例,結(jié)構(gòu)參數(shù)對帶隙的影響可以用等效的質(zhì)點(diǎn)彈簧系統(tǒng)模型來解釋。這種三組元板狀周期柵格結(jié)構(gòu)有望應(yīng)用于低頻振動的隔振設(shè)計中。
[Abstract]:Based on the local resonance mechanism of phonon crystals, a three-component plate-like periodic grid structure is proposed. The dispersion relation and the displacement field of characteristic modes of this new grid structure are analyzed and calculated by finite element method (FEM). Based on the energy band structure diagram and the finite element simulation results of vibration transfer, it can be seen that the grid structure has low frequency vibration band gaps in multiple directions. The local resonant band gap is produced by the resonance interaction between traveling wave and oscillator. Taking the first bending vibration band gap as an example, the effect of structural parameters on the band gap can be explained by the equivalent particle spring system model. The three-component plate periodic grid structure is expected to be used in the vibration isolation design of low frequency vibration.
【作者單位】： 哈爾濱工業(yè)大學(xué)機(jī)電工程學(xué)院;
【基金】：“111”工程(B07018)
【分類號】：O327
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本文編號：2446106