中国造船
中國造船
중국조선
SHIPBUILDING OF CHINA
2009年
4期
1-6
,共6页
船舶、舰船工程%大侧斜螺旋桨%计算流体力学%应力%有限元
船舶、艦船工程%大側斜螺鏇槳%計算流體力學%應力%有限元
선박、함선공정%대측사라선장%계산류체역학%응력%유한원
ship engineering%highly skewed propeller%computational fluid dynamic%stress%finite element analysis
采用求解RANS方程的方法对某大侧斜螺旋桨敞水流场进行模拟,计算得到的推力系数与力矩系数与试验值有很好的一致性.在此基础上,将计算得到的桨叶水动力载荷、离心力载荷和重力载荷导入有限元模型,求解大侧斜螺旋桨桨叶应力场分布.根据应力场分布特点,可知:桨叶除叶根有应力集中区域外,0.5倍半径靠近随边处还存在应力集中区域;在0.5倍半径桨叶切面处,桨叶压力面应力从导边至随边递增,桨叶吸力面应力从导边至随边存在波动.
採用求解RANS方程的方法對某大側斜螺鏇槳敞水流場進行模擬,計算得到的推力繫數與力矩繫數與試驗值有很好的一緻性.在此基礎上,將計算得到的槳葉水動力載荷、離心力載荷和重力載荷導入有限元模型,求解大側斜螺鏇槳槳葉應力場分佈.根據應力場分佈特點,可知:槳葉除葉根有應力集中區域外,0.5倍半徑靠近隨邊處還存在應力集中區域;在0.5倍半徑槳葉切麵處,槳葉壓力麵應力從導邊至隨邊遞增,槳葉吸力麵應力從導邊至隨邊存在波動.
채용구해RANS방정적방법대모대측사라선장창수류장진행모의,계산득도적추력계수여력구계수여시험치유흔호적일치성.재차기출상,장계산득도적장협수동력재하、리심력재하화중력재하도입유한원모형,구해대측사라선장장협응력장분포.근거응력장분포특점,가지:장협제협근유응력집중구역외,0.5배반경고근수변처환존재응력집중구역;재0.5배반경장협절면처,장협압력면응력종도변지수변체증,장협흡력면응력종도변지수변존재파동.
The flow field of a highly skewed propeller under open water condition is simulated by solving RANS equations. Simulated results fit well with experiment data. Then, hydrodynamic loads,centrifugal loads and gravity on propeller blade are exported to the finite element analysis code.The displacement and stress of the blade is calculated by the finite element analysis code, and the characteristic of the distribution of stress on the highly skewed propeller blade is described. Then the results are obtained as follow: fitstly, the blade stress concentrates not only near the blade root, but also in the areas near trailing edge at the mid-span of blade. Secondly, at the mid-span of blade, the blade stress on pressure side increases from leading edge to trailing edge, and the stress on suction side are fluctuated.
