本文關(guān)鍵詞： 滲流 自由面 棄單元法 ANSYS　出處：《水電能源科學(xué)》2016年11期 　論文類型：期刊論文

【摘要】：為了將計(jì)算滲流自由面的棄單元法應(yīng)用于ANSYS軟件中,對(duì)其進(jìn)行了改進(jìn),即根據(jù)每次迭代計(jì)算結(jié)果,將節(jié)點(diǎn)全部位于自由面以上的單元均刪掉,從而使得總體傳導(dǎo)矩陣的階數(shù)不斷降低,計(jì)算效率得到提高。在計(jì)算復(fù)合單元等效滲透系數(shù)時(shí),對(duì)復(fù)合單元進(jìn)行二次細(xì)分,以減小單元尺寸對(duì)計(jì)算結(jié)果的影響。計(jì)算收斂后,對(duì)復(fù)合單元上的節(jié)點(diǎn)插值求出零壓頭點(diǎn)坐標(biāo),再對(duì)零壓頭點(diǎn)進(jìn)行曲線擬合或曲面擬合即得自由面。基于該方法,利用ANSYS的APDL語言編制了滲流自由面分析程序,并進(jìn)行了實(shí)例分析。結(jié)果表明,提出的改進(jìn)方法結(jié)構(gòu)簡單、精度較高。
[Abstract]:In order to apply the discard element method to the calculation of seepage free surface in ANSYS software, the method is improved, that is, according to the results of each iteration, all the nodes above the free surface are deleted. In order to reduce the order of the overall conduction matrix and improve the calculation efficiency, the composite element is subdivided twice in order to reduce the effect of element size on the calculation results. The point coordinates of zero pressure head are obtained by interpolating the nodes on the composite element, and then the free surface is obtained by curve fitting or surface fitting. Based on this method, the free surface analysis program of seepage flow is compiled by using APDL language of ANSYS. The results show that the improved method is simple in structure and high in precision.
【作者單位】： 中鐵第一勘察設(shè)計(jì)院集團(tuán)有限公司;
【分類號(hào)】：TV139.1
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本文編號(hào)：1516078