内蒙古公路与运输
內矇古公路與運輸
내몽고공로여운수
HIGHWAYS & TRANSPORTATION IN INNER MONGOLIA
2012年
4期
30-33
,共4页
CFD%静三分力系数%主梁断面%风攻角
CFD%靜三分力繫數%主樑斷麵%風攻角
CFD%정삼분력계수%주량단면%풍공각
CFD%static three - component force coefficient%girder section%wind attack angle
利用流体分析软件Fluent计算了不同桥梁断面型式在中等雷诺数时和不同攻角下的阻力系数和升力系数。文中选用6类不同桥梁断面型式进行了计算分析。通过计算得出的阻力、升力系数随攻角的变化对比以及风场压力云图直观反映,初步分析了各类断面在静风作用下三分力系数值的特性。计算结果表明,钝体断面其阻力系数的变化形式相似,而上下不对称开口会造成其升力系数的变化;而流线型断面,其阻力系数与钝体断面截然不同,与攻角有直接的关系,实际应用需要多注意。
利用流體分析軟件Fluent計算瞭不同橋樑斷麵型式在中等雷諾數時和不同攻角下的阻力繫數和升力繫數。文中選用6類不同橋樑斷麵型式進行瞭計算分析。通過計算得齣的阻力、升力繫數隨攻角的變化對比以及風場壓力雲圖直觀反映,初步分析瞭各類斷麵在靜風作用下三分力繫數值的特性。計算結果錶明,鈍體斷麵其阻力繫數的變化形式相似,而上下不對稱開口會造成其升力繫數的變化;而流線型斷麵,其阻力繫數與鈍體斷麵截然不同,與攻角有直接的關繫,實際應用需要多註意。
이용류체분석연건Fluent계산료불동교량단면형식재중등뢰낙수시화불동공각하적조력계수화승력계수。문중선용6류불동교량단면형식진행료계산분석。통과계산득출적조력、승력계수수공각적변화대비이급풍장압력운도직관반영,초보분석료각류단면재정풍작용하삼분력계수치적특성。계산결과표명,둔체단면기조력계수적변화형식상사,이상하불대칭개구회조성기승력계수적변화;이류선형단면,기조력계수여둔체단면절연불동,여공각유직접적관계,실제응용수요다주의。
This article uses fluid analysis software Fluent to calculate the resistance coefficient and lift coefficient in medium Reynolds number and different attack angle. Six different types of bridge sections are calculated and analyzed. With the contrast of the change of calculated resistance and lift coefficient, and directly reflection of wind pressure cloud, preliminary analyzes the value characteristic of three - component force coefficient of various sections in static wind. The results show that the change form of resistance coefficient in blunt body section is similar, and the upper and lower asymmetric opening will cause the lift coefficient changes; to streamlined section, the resistance coefficient is distinct different to blunt body section and is directly related to the attack angle , need more attention in practical applications.
