摘要
针对格构式圆截面钢管塔天平测力风洞试验的体型系数是否需要修正的问题,采用6种体型的圆钢塔在均匀流和B类地貌下进行测力试验.根据基底剪力和基底弯矩计算输电塔的整体体型系数,对比2类风场下的数据以获得体型系数在均匀流时的修正系数.研究表明,按基底弯矩和基底剪力计算的体型系数比较接近;输电塔顺线向体型系数的最大值出现在均匀流的15°风向和B类地貌流场的0°风向;在圆钢塔的天平测力风洞试验中,B类地貌风场下测试获得的体型系数更加合理,均匀流下建议进行体型系数的修正.
In order to analyze the problem that the body shape coefficients of steel latticed towers with cylindrical members obtained from force balance tests in wind tunnel need to be modified or not, six towers with different shapes were tested both in the uniform flow and in the boundary layer flow simulated category B. The base shear forces and the base bending moments were used to calculate the total body shape coefficients of the towers. The modification factors of the body shape coefficients were determined by comparing the data obtained from the two types of flow. Results show that the total body shape coefficients calculated using the base shear forces and the base bending moments are quite close. The maximum values of along-wind body shape coefficients occur at wind angle of 15 in the uniform flow and at wind angle of 0 in the boundary layer flow simulated category B. When using force balance tests to obtain the body shape coefficients of steel latticed towers with cylindrical members, the data obtained in boundary layer simulated category B are much more reasonable and the data obtained in the uniform flow are suggested to be modified.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2014年第4期704-710,共7页
Journal of Zhejiang University：Engineering Science
基金
国家自然科学基金资助项目(51178425)
关键词
输电塔
风荷载
测力天平试验
体型系数
雷诺数
transmission tower； wind load； force balance test； body shape coefficient； Reynolds number
