本文選題：樁筒復(fù)合基礎(chǔ) + 海上風(fēng)機(jī)�。� 參考：《水利水運(yùn)工程學(xué)報(bào)》2017年05期

【摘要】：海上風(fēng)機(jī)所處環(huán)境復(fù)雜,在風(fēng)、波浪等隨機(jī)動(dòng)載作用下易發(fā)生共振破壞。為研究采用樁筒復(fù)合基礎(chǔ)海上風(fēng)機(jī)的振動(dòng)特性,選擇合理的基礎(chǔ)設(shè)計(jì)參數(shù),利用有限元軟件ABAQUS進(jìn)行海上風(fēng)機(jī)整體建模,采用Block Lanczos方法進(jìn)行模態(tài)分析,同時(shí)將所得自振頻率與外荷載頻率進(jìn)行對(duì)比研究,并分析不同基礎(chǔ)形式與不同基礎(chǔ)約束條件下的風(fēng)機(jī)整體振動(dòng)特性。研究發(fā)現(xiàn):前2階水平彎曲頻率與第3階扭轉(zhuǎn)頻率為判斷風(fēng)機(jī)整體共振的主要頻率;與單樁基礎(chǔ)相比,樁筒復(fù)合基礎(chǔ)能夠有效增加風(fēng)機(jī)抵抗水平荷載的能力,且在該設(shè)計(jì)參數(shù)條件下風(fēng)機(jī)能夠避免共振的發(fā)生;在基礎(chǔ)設(shè)計(jì)時(shí),應(yīng)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(guó)石油大學(xué)(華東)儲(chǔ)運(yùn)與建筑工程學(xué)院;福建省水利水電勘測(cè)設(shè)計(jì)研究院;
【基金】：國(guó)家自然科學(xué)基金青年科學(xué)基金項(xiàng)目(51408609) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專(zhuān)項(xiàng)資金(15CX02044A)
【分類(lèi)號(hào)】：TM315

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本文編號(hào)：1930518