Wind induced response numerical simulation of a transmission tower-line system in real mountainous terrain
LIU Menglong1, L Hongkun2, LUO Kun1, WANG Mingjun3, FAN Jianren1, CHI Wei2
1.College of Energy Engineering, Zhejiang University, Hangzhou 310027, China;
2.State Grid Zhejiang Electric Power Research Institute, Hangzhou 310014, China;
3.E.Energy Technology Co., Ltd., Hangzhou 310012, China
Abstract:A tower-line system finite element model was established based on a transmission line system located in a mountain in Wenzhou, and the structured grids were generated according to elevation data of surrounding terrain.Computational fluid dynamics (CFD) simulation was carried out on the mountain terrain model to research the features of wind field, then finite element analysis for wind-induced response was carried out with CFD result.The result indicates: wind velocity profile is different from the exponential distribution from Chinese codes due to the effect of complex terrain; the span difference and wind load difference of two sides conductors can directly affect axis force of principle members, so span in high wind speed areas should be reduced and span difference between two sides of transmission towers should be controlled in practical design; computing according to parameter from code can affect the shear of tower’s bottom and load along the line on the tower, and can overestimate the wind fluctuation in transient simulation, so the effect of mountain terrain should be paid more attention to in engineering analysis.
刘孟龙1,吕洪坤2,罗坤1,汪明军3,樊建人1,池伟2. 真实山地地形条件下输电塔线体系风致响应数值模拟[J]. 振动与冲击, 2020, 39(24): 232-239.
LIU Menglong1, L Hongkun2, LUO Kun1, WANG Mingjun3, FAN Jianren1, CHI Wei2. Wind induced response numerical simulation of a transmission tower-line system in real mountainous terrain. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(24): 232-239.
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