船舶力学
船舶力學
선박역학
JOURNAL OF SHIP MECHANICS
2015年
1期
43-51
,共9页
上官子柠%韩端锋%马庆位
上官子檸%韓耑鋒%馬慶位
상관자저%한단봉%마경위
SPH-ALE%黎曼解%时间积分%孤立波%波浪破碎
SPH-ALE%黎曼解%時間積分%孤立波%波浪破碎
SPH-ALE%려만해%시간적분%고립파%파랑파쇄
SPH-ALE%Riemann Solver%time integration%solitary wave%wave breaking
应用传统的 SPH 方法处理数值造波问题有一定的局限性,波浪在传播过程中由于能量耗散会出现衰减,且粒子压力场存在数值震荡。该文基于 SPH-ALE(Arbitrary Lagrangian-Eulerian)方法,提出了一种适用于黎曼解算法的时间积分方法,详细论述了对自由面粒子的捕捉方法。采用 SPH-ALE 方法分别对规则波传播、强非线性波的破碎、孤立波生成及在斜坡上的破碎进行了数值模拟。模拟结果表明,该方法可以有效地解决波浪衰减及压力场不稳定问题,并且可以有效捕捉波浪破碎的瞬时形态。
應用傳統的 SPH 方法處理數值造波問題有一定的跼限性,波浪在傳播過程中由于能量耗散會齣現衰減,且粒子壓力場存在數值震盪。該文基于 SPH-ALE(Arbitrary Lagrangian-Eulerian)方法,提齣瞭一種適用于黎曼解算法的時間積分方法,詳細論述瞭對自由麵粒子的捕捉方法。採用 SPH-ALE 方法分彆對規則波傳播、彊非線性波的破碎、孤立波生成及在斜坡上的破碎進行瞭數值模擬。模擬結果錶明,該方法可以有效地解決波浪衰減及壓力場不穩定問題,併且可以有效捕捉波浪破碎的瞬時形態。
응용전통적 SPH 방법처리수치조파문제유일정적국한성,파랑재전파과정중유우능량모산회출현쇠감,차입자압력장존재수치진탕。해문기우 SPH-ALE(Arbitrary Lagrangian-Eulerian)방법,제출료일충괄용우려만해산법적시간적분방법,상세논술료대자유면입자적포착방법。채용 SPH-ALE 방법분별대규칙파전파、강비선성파적파쇄、고립파생성급재사파상적파쇄진행료수치모의。모의결과표명,해방법가이유효지해결파랑쇠감급압력장불은정문제,병차가이유효포착파랑파쇄적순시형태。
The general SPH method applied to numerical wave making problem has some limitations, wave decay due to energy dissipation in the process of wave propagation and strong oscillation of particle’s pressure. Based on the SPH-ALE (Arbitrary Lagrangian-Eulerian), this paper proposed a time integration method for the Riemann algorithm, and discussed the tracking technology of dynamic particle in detail. In order to verify the validation of SPH-ALE, which was applied to several piston wave making problem, reg-ular wave propagates, highly nolinear wave breaking, solitary wave generation and breaking on the slope, re-spectively. The numerical result shows that SPH-ALE is valid to deal with the piston wave making problem, and well done in capturing the instantaneous pattern of wave breaking.