CAJ | 학술논문

应用有限元子模型法对某工程高水头薄拱坝泄水底孔进行了三维有限元计算，分析了底孔有压段的孔口应力及上、下游悬臂结构的应力状态。结果表明上游悬臂和坝体交接处底孔侧壁部位顺水流向拉应力较大，而传统的平面有限元法计算拱坝泄水孔口的应力时，认为顺水流向的应力比较小；又通过多方案的计算，对不同模型计算结果的差异进行了分析。相对于传统计算方法，用子模型法对高水头薄拱坝泄水孔口进行有限元分析，可以大大降低计算工作量，减少计算所花费的时间，并有利于提高计算的精度。
응용유한원자모형법대모공정고수두박공패설수저공진행료삼유유한원계산，분석료저공유압단적공구응력급상、하유현비결구적응력상태。결과표명상유현비화패체교접처저공측벽부위순수류향랍응력교대，이전통적평면유한원법계산공패설수공구적응력시，인위순수류향적응력비교소；우통과다방안적계산，대불동모형계산결과적차이진행료분석。상대우전통계산방법，용자모형법대고수두박공패설수공구진행유한원분석，가이대대강저계산공작량，감소계산소화비적시간，병유리우제고계산적정도。
Here ,the finite element sub-model method is applied to the 3D calculation of a high-head and thin arch dam engineering ,and the opening stress of the pressure section of its bottom outlet and the stress state of its upstream and downstream cantilevers are analyzed .The results show that the tensile stress of the flow direction of the bottom outlet sidewall in the intersection of upstream cantilevers and dam body is large ,but with the traditional plane finite element method ,it is considered that this tensile stress is small when calculating the stress near orifices .Then by calculating multiple solutions ,the different calculation results of different models are analyzed .Compared with the traditional calcu-lation method ,using the sub-model method for the analysis of the high-head and thin arch dam’s bottom outlet with finite element analysis could greatly reduce the computational effort and time ,and help to improve the accuracy of the calcula-tion .