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风电塔的支撑结构属于轻薄壁高耸结构,这使得结构很容易由于振动而弯曲或倾倒破坏。风电塔的振动一般是由风、地震引起的,因此考虑土体效应对结构在风及地震共同作用下的影响具有重要意义。本文中比较了梁单元与壳体单元两种建模方式对结构振动的影响,确认了结构薄弱位置的动力反应情况,并进行模型计算弯矩、剪力与理论计算数值的比较,确定土体效应在一定程度上放大了地震加速度数值,但减小了对结构应力破坏的情况。
The wind tower support structure belongs to the thin-walled towering structure, which makes the structure vulnerable to bending or dumping damage due to vibration. The vibration of wind power tower is generally caused by wind and earthquake. Therefore, it is of great significance to consider the effect of soil effect on the structure under the common action of wind and earthquake. In this paper, the effects of two modeling methods of beam element and shell element on the vibration of structure are compared, the dynamic response of the structure at weak position is confirmed, and the comparison of bending moment, The effect amplifies the magnitude of earthquake acceleration to a certain extent, but reduces the damage to the structure.