本文選題：樁筒復合基礎 + 海上風機��； 參考：《水利水運工程學報》2017年05期

【摘要】：海上風機所處環(huán)境復雜,在風、波浪等隨機動載作用下易發(fā)生共振破壞。為研究采用樁筒復合基礎海上風機的振動特性,選擇合理的基礎設計參數(shù),利用有限元軟件ABAQUS進行海上風機整體建模,采用Block Lanczos方法進行模態(tài)分析,同時將所得自振頻率與外荷載頻率進行對比研究,并分析不同基礎形式與不同基礎約束條件下的風機整體振動特性。研究發(fā)現(xiàn):前2階水平彎曲頻率與第3階扭轉頻率為判斷風機整體共振的主要頻率;與單樁基礎相比,樁筒復合基礎能夠有效增加風機抵抗水平荷載的能力,且在該設計參數(shù)條件下風機能夠避免共振的發(fā)生;在基礎設計時,應考慮樁土相互作用(PSI)的影響。
[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.
【作者單位】： 中國石油大學(華東)儲運與建筑工程學院;福建省水利水電勘測設計研究院;
【基金】：國家自然科學基金青年科學基金項目(51408609) 中央高�；究蒲袠I(yè)務費專項資金(15CX02044A)
【分類號】：TM315

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本文編號：1930518