考虑P-Δ效应的钢-混凝土混合塔筒动力响应分析  

Dynamic response analysis of steel-concrete hybrid tower considering P-Δeffect

作　　者：李守振 周绪红[1,3] 王宇航 甘丹[1,2] 朱嵘华 Li Shouzhen;Zhou Xuhong;Wang Yuhang;Gan Dan;Zhu Ronghua(School of Civil Engineering,Chongqing University,Chongqing 400045,China;Key Laboratory of New Technology for Construction of Cities in Mountain Area,Chongqing University,Chongqing 400045,China;Yangjiang Offshore Wind Energy Laboratory,Yangjiang 529533,China)

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045 [3]阳江海上风电实验室,阳江529533

出　　处：《东南大学学报（自然科学版）》2024年第1期9-16,共8页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(52278144,52221002);中央高校基本科研业务费资助项目(2022CDJQY-009)。

摘　　要：为了提高风电机组钢-混凝土混合塔筒动力响应的分析效率,将风电机组钢-混凝土混合塔筒视为自由端有集中质量的欧拉-伯努利悬臂梁,提出了动力响应的高效分析方法.该方法考虑了重力二阶效应(P-Δ效应)对整体结构的动力响应,以及钢材与混凝土对结构整体阻尼比的影响.通过与基于ABAQUS的有限元模拟结果进行对比,验证了所提出分析方法的有效性,并研究了P-Δ效应对整体动力响应的影响程度.对比结果表明:与忽略P-Δ效应相比,考虑P-Δ效应时理论分析结果更接近于有限元分析结果;理论分析结果与有限元分析结果关于位移、速度和加速度均方根的最大相对误差分别为3.09%、3.81%、4.63%.这表明所建立的风电机组钢-混凝土混合塔筒动力响应分析模型具有与有限元分析相当的计算精度.To improve the efficiency of analyzing the dynamic responses of the wind turbine steel-concrete hybrid tower,an efficient analysis method is proposed for analyzing the dynamic responses.The wind turbine steel-concrete hybrid tower is regarded as a Euler-Bernoulli cantilever beam with a lumped mass at its free end.The influence of the second-order gravity effect(P-Δeffect)on the overall structural dynamic response is considered,as well as the effect of the steel and concrete on the overall damping ratio of the structure.A comparison with finite element simulation results based on ABAQUS validates the effectiveness of the proposed method,and the influence of the P-Δeffect on the overall dynamic responses is investigated.The comparison results indicate that compared with the results without considering the P-Δeffect,the theoretical analysis results considering the P-Δeffect are closer to the finite element analysis results.The maximum relative errors between the theoretical and the finite element analysis results for displacement,velocity,and acceleration are 3.09%,3.81%,and 4.63%,respectively.It indicates that the established analysis model for the dynamic response of the wind turbine steel-concrete hybrid tower has a comparable calculation accuracy to the finite element analysis.

关 键 词：钢-混凝土混合塔筒 风电机组 动力响应 重力二阶效应 等效阻尼比 

分 类 号：TU311.3[建筑科学—结构工程]