本文關(guān)鍵詞： 次Bjerknes力 體積振動(dòng)振幅 振動(dòng)初相位 散射　出處：《物理學(xué)報(bào)》2016年01期 　論文類型：期刊論文

【摘要】：利用Lagrange方程得到了次Bjerknes力作用下氣泡的體積振動(dòng)方程,并探討了次Bjerknes力作用下不同參數(shù)對(duì)氣泡體積振動(dòng)振幅和振動(dòng)初相位的影響,研究了振動(dòng)初相位差為π和0的氣泡對(duì)在液體中形成的散射聲場(chǎng)特征.結(jié)果表明:次Bjerknes作用力下,相鄰氣泡半徑、氣泡間距、多方指數(shù)均能影響氣泡的體積振動(dòng)振幅,氣泡對(duì)的均衡半徑、氣泡間距和驅(qū)動(dòng)頻率則對(duì)氣泡振動(dòng)初相位產(chǎn)生明顯影響;相距很近、相位相差為π的兩個(gè)氣泡的散射聲壓與氣泡體積振動(dòng)振幅、氣泡間距、驅(qū)動(dòng)頻率和振動(dòng)初相位有關(guān),隨聲場(chǎng)距離成反比減小,與聲場(chǎng)位置有關(guān),其平均散射聲功率是單個(gè)孤立氣泡的1/6(kd_(12))~2半徑相同、相距很近、相位相同的兩個(gè)6氣泡的散射聲壓與氣泡振動(dòng)初相位、體積振動(dòng)振幅、氣泡間距、驅(qū)動(dòng)頻率有關(guān),隨聲場(chǎng)距離成反比減小,其平均散射聲功率是單個(gè)孤立氣泡的4倍.
[Abstract]:Using Lagrange equation Bjerknes equation of bubble volume vibration force, and discusses the Bjerknes force under the action of different parameters on the vibration amplitude and vibration effects of the bubble volume of the initial phase of the vibration, the initial phase difference of PI and 0 bubbles on the scattering field characteristics formed in the liquid. The results show that: Bjerknes force, adjacent bubble radius, bubble spacing, multi index can affect the vibration amplitude of the bubble volume, the equilibrium of bubble radius, bubble spacing and driving frequency of bubble oscillation phase influence; the distance is very near, the phase difference between two PI bubble scattering pressure and vibration amplitude of the bubble volume, spacing, driving frequency and vibration phase, inverse distance decreases with the sound field and sound field, the position, the average scattering of sound power is a single isolated bubble 1/6 (kd_ (12)) ~2 radius At the same distance, the scattering sound pressure of the two 6 bubbles with the same phase is related to the initial phase of bubble vibration, volume vibration amplitude, bubble spacing and driving frequency, and decreases with the sound field distance. The average scattering sound power is 4 times that of a single isolated bubble.

【作者單位】： 陜西師范大學(xué)陜西省超聲學(xué)重點(diǎn)實(shí)驗(yàn)室;寧夏師范學(xué)院物理與信息技術(shù)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(批準(zhǔn)號(hào):11174192,11374200,11474192)資助的課題~~
【分類號(hào)】：O32
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本文編號(hào)：1550404