doubly asymptotic approximation中文什么意思

asymptotic approximation: 漸近逼近; 漸近性近似; 漸逝逼近
doubly asymptotic orbit: 雙漸近軌道
doubly: 成兩倍; 二倍地
asymptotic: 漸近的; 漸近線的; 浙近的
approximation: n. 1.接近；近似。 2.【數(shù)學(xué)】近似值。 3.概算，略計。 successive approximations 逐次近似計算法。 be a very close approximation to 很接近于…。

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it is well known that the coupled interactions between the ship hull and the surrounding fluid field of explosion give rise great influence to both the fluid loadings over the structural wetted surface and the responses of the hull . jt is the coupling effect that provides the major difficulties in the underwater explosion induced dynamic responses of the ship structure . the second order doubly asymptotic approximation method ( dda2 ) has been commonly employed in the world to deal with the coupling effect
本文針對daa方法不適合于分析敷有聲阻抗與水差不多的聲學(xué)材料(如玻璃鋼與消聲瓦)的船體結(jié)構(gòu)與水下沖擊波相互作用的局限性，依據(jù)聲波的反射和透射原理對二階daa方法的高頻段進(jìn)行了改進(jìn)，發(fā)展并提出了能夠分析聲學(xué)材料流固相互作用的adaa方法(acousticdaa)，拓展了應(yīng)用范圍，使現(xiàn)有的二階daa方法成為它的一個特例。

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