【摘要】：以空氣泡為例,采用描述氣泡半徑運(yùn)動(dòng)的Rayleigh-Plesset方程,對(duì)其在高頻聲壓輻照下的非線性振蕩,散射聲場(chǎng)和散射截面進(jìn)行理論和數(shù)值研究,為獲取更清晰的圖像提供理論依據(jù)。結(jié)果表明:激勵(lì)聲壓的頻率在微泡的固有諧振頻率附近時(shí),可以產(chǎn)生強(qiáng)的二次諧波散射聲壓。同時(shí),提高入射聲強(qiáng)可以增大二次諧波散射截面,但不能改變基波散射截面。
[Abstract]:Taking air bubble as an example, the Rayleigh-Plesset equation describing the motion of bubble radius is used to study the nonlinear oscillation, scattered sound field and scattering cross section under high frequency sound pressure irradiation, which provides a theoretical basis for obtaining a clearer image. The results show that strong second harmonic scattering sound pressure can be produced when the frequency of excited sound pressure is near the inherent resonance frequency of microbubble. At the same time, the second harmonic scattering cross section can be increased by increasing the incident sound intensity, but the fundamental wave scattering cross section can not be changed.
【作者單位】： 中國(guó)科學(xué)院聲學(xué)研究所東海研究站;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(11274342;11304353;11474042;11574348)
【分類號(hào)】：R445.1;O426.9

【相似文獻(xiàn)】

相關(guān)會(huì)議論文 前1條

1 龔燕君;章東;龔秀芬;;超聲造影劑Optison的次諧波激勵(lì)及閾值研究[A];2004年全國(guó)物理聲學(xué)會(huì)議論文集[C];2004年

，

本文編號(hào)：2180783