【摘要】：給出了基于Fock電流和增量長(zhǎng)度繞射系數(shù)技術(shù)(Incremental Length Diffraction Coefficients,ILDC)得到的三維凸圓柱上的高頻散射場(chǎng)的表達(dá)式,應(yīng)用路徑變換法和數(shù)值最速下降路徑(Numerical Steepest Descent Path,NSDP)方法計(jì)算基于Fock電流的高振蕩積分,得到散射場(chǎng).數(shù)值算例顯示,使用這一方法計(jì)算高頻散射場(chǎng),可以實(shí)現(xiàn)在不同頻段的入射波下計(jì)算時(shí)間與頻率無(wú)關(guān).并給出一種基于測(cè)地線性質(zhì)的爬行波尋跡算法,具有較高的精度和更高的計(jì)算效率,適用于任意光滑模型上爬行波的尋跡.
[Abstract]:The expression of high frequency scattering field on a three dimensional convex cylinder based on Fock current and increment length diffraction coefficient technique (Incremental Length Diffraction Coefficients,ILDC) is given. The high oscillation integral based on the Fock current is calculated by using the path transformation method and the numerical maximum descent path (Numerical Steepest Descent Path,NSDP) method, and the scattering field is obtained. Numerical examples show that using this method to calculate the high frequency scattering field, it can be realized that the calculation time is independent of the frequency under the incident wave in different frequency bands. An algorithm based on geodesic property for crawling wave tracing is presented, which has higher accuracy and higher computational efficiency. It is suitable for crawling wave tracing on arbitrary smooth model.
【作者單位】： 復(fù)旦大學(xué)信息科學(xué)與工程學(xué)院電磁波信息科學(xué)教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(61401103) 上海國(guó)家自然科學(xué)基金(14ZR1402400) 毫米波國(guó)家重點(diǎn)實(shí)驗(yàn)室(K201505)
【分類號(hào)】：TN011
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本文編號(hào)：2284213