基于桩筒复合基础海上风机振动特性分析

发布时间：2018-05-24 20:57

本文选题：桩筒复合基础 + 海上风机　；参考：《水利水运工程学报》2017年05期

【摘要】：海上风机所处环境复杂,在风、波浪等随机动载作用下易发生共振破坏。为研究采用桩筒复合基础海上风机的振动特性,选择合理的基础设计参数,利用有限元软件ABAQUS进行海上风机整体建模,采用Block Lanczos方法进行模态分析,同时将所得自振频率与外荷载频率进行对比研究,并分析不同基础形式与不同基础约束条件下的风机整体振动特性。研究发现:前2阶水平弯曲频率与第3阶扭转频率为判断风机整体共振的主要频率;与单桩基础相比,桩筒复合基础能够有效增加风机抵抗水平荷载的能力,且在该设计参数条件下风机能够避免共振的发生;在基础设计时,应考虑桩土相互作用(PSI)的影响。
[Abstract]:The environment of offshore fan is complex, and resonance damage is easy to occur under random dynamic loads such as wind and wave. In order to study the vibration characteristics of offshore fan with pile-cylinder composite foundation, select reasonable foundation design parameters, use finite element software ABAQUS to model the whole model of offshore fan, and use Block Lanczos method to carry out modal analysis. At the same time, the natural vibration frequency is compared with the external load frequency, and the overall vibration characteristics of the fan under different foundation forms and different foundation constraints are analyzed. It is found that the first 2 order horizontal bending frequency and the third order torsional frequency are the main frequencies for judging the overall resonance of the fan, and compared with the single pile foundation, the pile-tube composite foundation can effectively increase the fan's ability to resist horizontal load. The fan can avoid resonance under the condition of design parameters, and the influence of pile-soil interaction (PSI) should be considered in the design of foundation.
【作者单位】：中国石油大学(华东)储运与建筑工程学院;福建省水利水电勘测设计研究院;
【基金】：国家自然科学基金青年科学基金项目(51408609) 中央高校基本科研业务费专项资金(15CX02044A)
【分类号】：TM315

【相似文献】