南华大学学报（自然科学版）
南華大學學報（自然科學版）
남화대학학보（자연과학판）
JOURNAL OF NANHUA UNIVERSITY(SCIENCE AND TECHNOLOGY)
2014年
2期
54-60
,共7页
仿生塔架%流固耦合%模态分析%兆瓦级风力发电机组
倣生塔架%流固耦閤%模態分析%兆瓦級風力髮電機組
방생탑가%류고우합%모태분석%조와급풍력발전궤조
bionic tower%fluid-structure interaction%modal analysis%megawatt wind turbine
为避免兆瓦级风力发电机组风激共振破坏问题,采用流体控制方程建立了兆瓦级垂直轴风力发电机组仿生塔架流场模型,模仿棕榈树树干直径随高度变化的规律,分3段建立仿生塔架,对兆瓦级垂直轴风力发电机组塔架进行了流固耦合数值分析。结果表明,仿生塔架与同类项普通塔架相比,兆瓦级垂直轴风力发电机组仿生塔架变形虽然稍有增大,但能满足风机塔架的变形设计要求,其最大应力下降了3 MPa,1阶固有频率避开了共振的频率范围,材料用量减小了10%,减轻了塔架的质量。
為避免兆瓦級風力髮電機組風激共振破壞問題,採用流體控製方程建立瞭兆瓦級垂直軸風力髮電機組倣生塔架流場模型,模倣棕櫚樹樹榦直徑隨高度變化的規律,分3段建立倣生塔架,對兆瓦級垂直軸風力髮電機組塔架進行瞭流固耦閤數值分析。結果錶明,倣生塔架與同類項普通塔架相比,兆瓦級垂直軸風力髮電機組倣生塔架變形雖然稍有增大,但能滿足風機塔架的變形設計要求,其最大應力下降瞭3 MPa,1階固有頻率避開瞭共振的頻率範圍,材料用量減小瞭10%,減輕瞭塔架的質量。
위피면조와급풍력발전궤조풍격공진파배문제,채용류체공제방정건립료조와급수직축풍력발전궤조방생탑가류장모형,모방종려수수간직경수고도변화적규률,분3단건립방생탑가,대조와급수직축풍력발전궤조탑가진행료류고우합수치분석。결과표명,방생탑가여동류항보통탑가상비,조와급수직축풍력발전궤조방생탑가변형수연초유증대,단능만족풍궤탑가적변형설계요구,기최대응력하강료3 MPa,1계고유빈솔피개료공진적빈솔범위,재료용량감소료10%,감경료탑가적질량。
To avoid the resonance damage of megawatt wind turbine,a fluid-structure inter-action numerical analysis of megawatt vertical axis wind turbine was done by the establish-ment of bionic tower flow field model using fluid flow control equations. A bionic tower was set up with three steps,imitating the diameter change rule of palm tree trunk with height. The results show that the bionic tower of megawatt vertical axis wind turbine meets the re-quirements of deformation. Compared with the common tower,the maximum deformation of megawatt vertical axis wind turbine of the bionic tower increased, at the same time, the maximum stress decreased 3 MPa,the 1 order natural frequency avoided the resonance fre-quency range and the material consumption reduced by 10%, which means the weight of the tower were reduced.
