本文選題：高斯模型 + 輻射聲場��； 參考：《聲學(xué)學(xué)報》2017年04期

【摘要】：非近軸近似多元高斯模型克服了近軸近似條件的限制,能保證較大偏轉(zhuǎn)角度下模擬聲場的精確度和效率。根據(jù)雙層介質(zhì)的瑞利積分模型和單層介質(zhì)的非近軸近似多元高斯模型,推導(dǎo)出雙層介質(zhì)中基于非近軸近似多元高斯模型的單陣元輻射聲場計(jì)算模型。并在得到各陣元聲束偏轉(zhuǎn)聚焦的延遲時間基礎(chǔ)上,累加得到基于非近軸近似高斯模型的超聲相控陣橫波檢測輻射聲場計(jì)算模型。模擬計(jì)算帶丙烯酸樹脂楔塊的超聲相控陣探頭在鋼中橫波檢測的聲束偏轉(zhuǎn)與偏轉(zhuǎn)聚焦輻射聲場,并與近軸近似多元高斯模型的橫波檢測聲束的偏轉(zhuǎn)聚焦輻射聲場進(jìn)行比較分析。對比分析結(jié)果表明非近軸近似多元高斯模型計(jì)算速度更快,用時約為近軸近似多元高斯模型的1/13。此外,非近軸近似高斯模型方法橫波檢測的聚焦聲束覆蓋區(qū)域更大,能量更集中,更適于遠(yuǎn)場區(qū)域檢測。
[Abstract]:Non-paraxial approximation multivariate Gao Si model overcomes the limitation of paraxial approximation condition and can guarantee the accuracy and efficiency of sound field simulation at large deflection angle. Based on the Rayleigh integral model of double-layer medium and the non-paraxial approximate multivariate Gao Si model of single-layer medium, the radiation sound field calculation model of single array element in bilayer medium based on non-paraxial approximate multivariate Gao Si model is derived. On the basis of the delay time of beam deflection and focusing of each array element, the calculation model of ultrasonic phased array transverse wave detecting radiation sound field based on non-paraxial approximate Gao Si model is obtained. The acoustic field of ultrasonic phased array probe with acrylic resin wedge in steel detected by transverse wave deflection and deflection focusing is simulated and calculated. The acoustic field of ultrasonic phased array probe detected by ultrasonic phased array with acrylic resin wedge is compared with that of acoustic beam detected by paraxial approximate multivariate Gao Si model. The results of comparative analysis show that the computing speed of the non-paraxial approximate multivariate Gao Si model is faster, and the time taken is about 1 / 13 of that of the paraxial approximate multivariate Gao Si model. In addition, the non-paraxial approximate Gao Si model method is more suitable for far field detection because the focused acoustic beam has larger coverage and more concentrated energy.
【作者單位】： 哈爾濱工業(yè)大學(xué)土木工程學(xué)院;哈爾濱工業(yè)大學(xué)結(jié)構(gòu)工程災(zāi)變與控制教育部重點(diǎn)實(shí)驗(yàn)室;哈爾濱工業(yè)大學(xué)土木工程智能防災(zāi)減災(zāi)工業(yè)和信息化部重點(diǎn)實(shí)驗(yàn)室;大連理工大學(xué)土木工程學(xué)院;哈爾濱工業(yè)大學(xué)深圳研究生院土木與環(huán)境工程學(xué)院;
【基金】：國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(973計(jì)劃)(2011CB013705)資助
【分類號】：O422.2
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本文編號：2096263