CAJ | 학술논문

拉索的风雨激振是振幅最大、危害最严重的一种风致振动. 采用 FLUENT 软件分别对设置不同大小和形状的水线的拉索进行数值风洞试验,计算各种工况拉索的三分力系数,并与同条件下的光面拉索进行对比研究. 计算表明:水线对拉索的三分力系数的影响很大,设置水线后三分力系数均明显变小,水线的存在可能导致拉索的不稳定;而水线高度对三分力系数的影响不明显.
랍색적풍우격진시진폭최대、위해최엄중적일충풍치진동. 채용 FLUENT 연건분별대설치불동대소화형상적수선적랍색진행수치풍동시험,계산각충공황랍색적삼분력계수,병여동조건하적광면랍색진행대비연구. 계산표명:수선대랍색적삼분력계수적영향흔대,설치수선후삼분력계수균명현변소,수선적존재가능도치랍색적불은정;이수선고도대삼분력계수적영향불명현.
Rain-wind-induced vibration of stayed cables is one type of wind-induced vibration with the maxi-mum amplitude and the most serious damage. By using FLUENT software, this study carries out numerical wind tunnel tests on cables with waterline of different sizes,calculates three force coefficients respectively, and then compares results with those of the corresponding smooth cables. Results show that waterline has great influence on the three force coefficients of cables and the three force coefficients all become smaller obviously after setting up waterline. It concludes that the presence of waterline may lead to aerodynamic instability of stayed cables, but the height of the waterline has no obvious influence on three force coefficients.