兆瓦级风机叶片材料细观模型改进方法研究
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摘要
针对叶片材料璃纤维预浸带层间应力对大型风力机寿命的影响,对璃纤维预浸带细观模型的建模方法进行研究。采用有限元分析方法,并结合细观力学理论,将璃纤维预浸带各铺层层间应力的三个分量分别计算作为改进设计的目标,对叶片结构璃纤维预浸带细观模型进行改进,提出一种准三维细观模型的方法。以兆瓦级风力机叶片材料璃纤维预浸带细观模型为例,对改进前后叶片细观模型的三个分量参数进行的计算分析,并搭建璃纤维预浸带准三维实物模型,借助三维全场变形应变测量分析系统对实物模型进行实验,结果表明璃纤维预浸带准三维模型不仅能实现层间应力准确计算,且能实现对层间应力三个方向分量分别计算,为研究风力发电机组叶片寿命预测提供了一种新的理论与实验方法。
Aiming at the influence of glass fiber prepreg on life prediction large scale wind turbine blade,the modeling method of micro mechanics model design of glass fiber prepreg was studied.Using finite element analysis method,combining with the micro mechanics theory and setting three shape parameters of inter-laminar stress of every blade cross of glass fiber prepreg as variables of improvement design,a micro mechanics model that is quasi three dimensional model was presented.MW wind turbine blade glass fiber prepreg was chosen as an example to calculate and analyze the relation between three shape parameters of blade before and after improvement. A quasi three dimensional of glass fiber prepreg physical model was build to do physical model experiment based on XTDIC system.Results show quasi three dimensional model of glass fiber prepreg can not only actualize accurate calculation of the interlaminar stress of objects but also accurate the three directions of the interlaminar stresses are calculated separately. A new theoretical and laboratorial method for the study of blade life prediction of wind turbine was provided.
Aiming at the influence of glass fiber prepreg on life prediction large scale wind turbine blade,the modeling method of micro mechanics model design of glass fiber prepreg was studied.Using finite element analysis method,combining with the micro mechanics theory and setting three shape parameters of inter-laminar stress of every blade cross of glass fiber prepreg as variables of improvement design,a micro mechanics model that is quasi three dimensional model was presented.MW wind turbine blade glass fiber prepreg was chosen as an example to calculate and analyze the relation between three shape parameters of blade before and after improvement. A quasi three dimensional of glass fiber prepreg physical model was build to do physical model experiment based on XTDIC system.Results show quasi three dimensional model of glass fiber prepreg can not only actualize accurate calculation of the interlaminar stress of objects but also accurate the three directions of the interlaminar stresses are calculated separately. A new theoretical and laboratorial method for the study of blade life prediction of wind turbine was provided.
引文
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[8]李彪,李亚智,刘向东.层合板层间断裂分析的组合界面单元及其特性[J].复合材料学报,2013,30(5):159-165.(Li Biao,Li Ya-zhi,Liu Xiang-dong.Characterization of a combined interfacial element for laminated composites[J].Acta Materiae Compositae Sinica,2013,30(5):159-165.)
[9]王人杰.纤维增强复合材料横向弹性常数[J].复合材料学报,1996,3(2):98-104.(Wang Ren-Jie.Transverse elasstic constants for fiber reinforced composite materials[J].Acta Materiae Compositae Sinica,1996,13(2):98-104.)
[10]Renato Barboni,Rolando Carbonaro,Paolo Gaudenzi.The effect of delamination on the fatigue behavior of composite structures[J].Journal of Composite Materials,1999,33(3):267-303.
[11]Leguillon D,Marion G,Harry R,Lécuyer F.The onset of determination at stress-free edges in angle-ply laminates-analysis of two criteria[J].Composites Science and Technology,2001(61):377-382.
[12]陈刘定,童小燕,程起有.平纹编织C/SiC复合材料层间断裂行为试验研究[J].机械强度,2012,34(1):97-101.(Chen Liu-ding,Tong Xiao-yan,Cheng Qi-you.Experimental investigation on interlaminar fracture behavior of plain weave C/SIC composites[J].Journal of Mechanical Strength,2012,34(1):97-101.)
[2]彭惠芬,孟广伟,范森.复合材料层合板应力分析的小波有限元法[J].华南理工大学学报:自然科学版,2012,40(7):117-122.(Peng Hui-fen,Meng,Guang-wei,Fan Sen.Stress analysis of laminated composite plates with wavelet finite element method[J].Journal of South China University of Technology:Natural Science Edition,2012,40(7):117-122.)
[3]李玉龙,刘会芳.加载速率对层间断裂韧性的影响[J].航空学报,2015,36(8):2620-2650.(Li Yu-long,Liu Hui-fang.Loading rate effect on interlaminar fracture toughness.Acta Aeronautica et Astronautica Sinica,2015,8,36(8):2620-2650.)
[4]张培新,李亚智.受面内载荷的层压复合材料的层间应力分析[J].机械强度,2006,28(2):224-228.(Zhang Pen-xi,Li Ya-zhi.Inter laminar stress analysis of composite laminates subjected to in-plane loading[J].Journal of Mechanical Strength,2006,28(2):224-228.)
[5]张培新.复合材料层压板层间应力分析和疲劳寿命估算[D].西安:西北工业大学,2005.(Zhang Pen-xi.Stress analysis And fatigue life estimation of composite laminates[D].Xi An:College of Aeronautical Engineering,Northwestern Polytechnical University,2005.)
[6]李亚智,郭晓波,黄志远.基于组合单元的层压复合材料三维应力分析[J].复合材料学报,2010,27(1):207-212.(Li Ya-zhi,Guo Xiao-bo,Huang Zhi-yuan.3D stress analysis of composite laminate based on a kind of interfacial element[J].Acta Materiae Compositae Sinica,2010,27(1):207-212.)
[7]黄志远,李亚智,郭晓波.考虑三维应力的复合材料层压板疲劳寿命分析[J].复合材料学报,2009,26(3):173-178.(Huang Zhi-yuan,Li Ya-zhi,Guo Xiao-bo.Fatigue life prediction of composite laminates incorporating 3D stress analysis[J].Acta Materiae Compositae Sinica,2009,26(3):173-178.)
[8]李彪,李亚智,刘向东.层合板层间断裂分析的组合界面单元及其特性[J].复合材料学报,2013,30(5):159-165.(Li Biao,Li Ya-zhi,Liu Xiang-dong.Characterization of a combined interfacial element for laminated composites[J].Acta Materiae Compositae Sinica,2013,30(5):159-165.)
[9]王人杰.纤维增强复合材料横向弹性常数[J].复合材料学报,1996,3(2):98-104.(Wang Ren-Jie.Transverse elasstic constants for fiber reinforced composite materials[J].Acta Materiae Compositae Sinica,1996,13(2):98-104.)
[10]Renato Barboni,Rolando Carbonaro,Paolo Gaudenzi.The effect of delamination on the fatigue behavior of composite structures[J].Journal of Composite Materials,1999,33(3):267-303.
[11]Leguillon D,Marion G,Harry R,Lécuyer F.The onset of determination at stress-free edges in angle-ply laminates-analysis of two criteria[J].Composites Science and Technology,2001(61):377-382.
[12]陈刘定,童小燕,程起有.平纹编织C/SiC复合材料层间断裂行为试验研究[J].机械强度,2012,34(1):97-101.(Chen Liu-ding,Tong Xiao-yan,Cheng Qi-you.Experimental investigation on interlaminar fracture behavior of plain weave C/SIC composites[J].Journal of Mechanical Strength,2012,34(1):97-101.)