In order to improve the compution efficiency and the precision at the boundaries of the original VOF method when simulating the sloshing on prismatic tanks, the partial cell parameter is introduced to improve the original VOF method in the paper.
本文全面概述了液艙晃蕩的工程背景和國(guó)內(nèi)外液體晃蕩研究方法進(jìn)展;針對(duì)傳統(tǒng)VOF數(shù)值方法模擬棱形液艙晃蕩在處理復(fù)雜邊界時(shí)計(jì)算效率低下、收斂性差的問(wèn)題,采用部分單元參數(shù)法對(duì)其進(jìn)行改進(jìn),并對(duì)棱形液艙模型在不同充裝水平、不同橫搖激勵(lì)周期條件下進(jìn)行數(shù)值模擬,計(jì)算了艙內(nèi)自由液面運(yùn)動(dòng)歷程和復(fù)雜艙壁附近各點(diǎn)沖擊壓力歷程,并與實(shí)驗(yàn)結(jié)果進(jìn)行了比較,得到與實(shí)驗(yàn)結(jié)果相一致的結(jié)論;同時(shí)通過(guò)網(wǎng)格敏感性分析,也證明了改進(jìn)的VOF方法有良好的收斂性;最后,采用Morison方程對(duì)LNG液艙泵塔晃蕩載荷進(jìn)行計(jì)算分析。
In this paper, the triangular prism elements are used for discretizing the computational domain with Edge-Based Vector Finite Element Method.
本文的研究對(duì)象是基于三棱柱剖分單元的矢量有限元方法。