摘要
以覆冰铁塔圆断面构件为对象,研究覆冰铁塔构件刚度计算问题。提出覆冰受压构件的整体抗弯刚度公式,通过有限元计算证明结果的正确。在一定载荷条件下,对比不同厚度的覆冰以线荷载等效和以复合材料等效对铁塔构件挠度和刚度的影响。结果发现:在中重冰区,覆冰的几何(尺寸)效应大于其自重效应,这种效应减小了铁塔构件的位移量,增大了铁塔构件的整体刚度。在构件刚度的计算中应以复合材料等效覆冰铁塔构件,以并联方式求解覆冰铁塔构件的整体刚度。
In the icing electric transmission tower computation,has neglected the ice stiffness and the geometric effect to the iron tower component＇s influence.In the heavy ice area,such simplification is possibly inappropriate.Base on the parallel principle,proposed the ice accretion compression bar flexural stiffness formula,and proofed result correctness through finite element computation.Take the round ice accretion tower component for example,in the heavy ice area;ice accretion tower component was equivalent to compound materials.Under certain load condition,compared tower component displacement and stiffness of the different thickness ice accretion,which took the line load with equivalent to the compound materials.Result is showed that in the heavy ice area,the ice accretion geometry effect has increased the tower component stiffness.The influence is more obvious to the tower stiffness than its dead-weight.
出处
《中国农村水利水电》
北大核心
2011年第2期156-158,共3页
China Rural Water and Hydropower
关键词
覆冰
铁塔构件
刚度
有限元
几何效应
ice accretion
tower component
comprehensive stiffness
finite element
geometry effect
