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Due to the similarity between the internal structure of wind turbine blades and plant leaves, a new type of bionic leaf vein structural distribution was proposed, along with an entire composite blade layup program based on the bionic method of applying the mid-axis morphology of plant blades to 5 MW wind turbine blades. The modal analysis and static analysis of the new bionic vein blade were performed using the fluid-solid coupling method. The results show that the first six-order of the nature frequency of the bionic blade are improved in comparison to the traditional layup blade and are difficult to resonate, as well as its torsion resistance. Under the extreme wind load of 50 m/s, the displacement of the bionic blade’s tip is significantly smaller than that of the traditional blade, and the distribution of the strain and the distribution of the shear stress are more uniform than those of the traditional layup blade, but the maximum value of shear stress rises.
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鉴于风力机叶片内部结构与植物叶片存在一定的相似性,基于仿生学方法将植物叶片中轴形态应用于5 MW风力机叶片,提出一种新型仿生叶脉结构分布,并提出完整的复合材料叶片铺层方案。通过流固耦合方法对新型仿生叶脉叶片进行模态分析与静力学分析。结果表明,仿生叶片前6阶固有频率相较于传统铺层叶片均有所提高且不易发生共振,其抗扭转特性也有所提高;在50 m/s的极端风载荷作用下,仿生叶片叶尖位移量明显小于传统叶片,应变分布与切应力分布较传统叶片分布更加均匀,但切应力最大值有所增加。
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, authorsList=朱海波, 缪维跑, 王海生, 李春, 范士杰, 岳敏楠)}, authors=[Author(id=1241779314551755773, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=zhuhb0526@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1241779314635641855, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, authorId=1241779314551755773, language=EN, stringName=Haibo ZHU, firstName=Haibo, middleName=null, lastName=ZHU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1241779314744693760, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, authorId=1241779314551755773, language=CN, stringName=朱海波, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=上海理工大学 能源与动力工程学院,上海 200093, bio={"content":"
朱海波,男,1999年生,山东枣庄人,硕士研究生;主要研究方向为风力机结构设计;E-mail:zhuhb0526@163.com。
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朱海波,男,1999年生,山东枣庄人,硕士研究生;主要研究方向为风力机结构设计;E-mail:zhuhb0526@163.com。
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32(7):1014-1019.(In Chinese), articleTitle=The adaptive blade design of wind turbine based on beam flap-twist coupling theory, refAbstract=null)], funds=[Fund(id=1241779325230452815, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, awardId=51976131; 52006148; 52106262, language=EN, fundingSource=National Natural Science Foundation of China(51976131; 52006148; 52106262), fundOrder=null, country=null), Fund(id=1241779326719430736, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, awardId=51976131; 52006148; 52106262, language=CN, fundingSource=国家自然科学基金项目(51976131; 52006148; 52106262), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1241779314463675385, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, xref=null, ext=[AuthorCompanyExt(id=1241779314472063994, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, companyId=1241779314463675385, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China), AuthorCompanyExt(id=1241779314476258299, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, companyId=1241779314463675385, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=上海理工大学 能源与动力工程学院,上海 200093)])], figs=[ArticleFig(id=1241779318813167651, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 1, caption=
Different airfoil position along spanwise direction, figureFileSmall=KaYKJOFCgLWJn7+6A/ujPg==, figureFileBig=3CT0kNFHzBjlEvS9z3xnhA==, tableContent=null), ArticleFig(id=1241779318909636644, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图1, caption=
不同翼型沿展向位置, figureFileSmall=KaYKJOFCgLWJn7+6A/ujPg==, figureFileBig=3CT0kNFHzBjlEvS9z3xnhA==, tableContent=null), ArticleFig(id=1241779319018688549, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 2, caption=
Geometry model of blade, figureFileSmall=2qxLM2txUXhjY4Ghi4cHsg==, figureFileBig=L3Yr4SEq0vLAtDUvwKq+XQ==, tableContent=null), ArticleFig(id=1241779319089991718, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图2, caption=
叶片几何模型, figureFileSmall=2qxLM2txUXhjY4Ghi4cHsg==, figureFileBig=L3Yr4SEq0vLAtDUvwKq+XQ==, tableContent=null), ArticleFig(id=1241779319203237927, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 3, caption=
Vein network of plant leaves, figureFileSmall=zkCV7QHALlF6TQkYv87TBQ==, figureFileBig=oqmXu8vYTH27RIEpFfvt0g==, tableContent=null), ArticleFig(id=1241779319287124008, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图3, caption=
植物叶片的叶脉网络, figureFileSmall=zkCV7QHALlF6TQkYv87TBQ==, figureFileBig=oqmXu8vYTH27RIEpFfvt0g==, tableContent=null), ArticleFig(id=1241779319404564521, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 4, caption=
Modeling process of the bionic blade, figureFileSmall=kr9L/Sw0Dj01KTJCR6IApQ==, figureFileBig=GxFLFTRVMY3RH4pQiUBY/A==, tableContent=null), ArticleFig(id=1241779319522005034, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图4, caption=
仿生叶片建模过程, figureFileSmall=kr9L/Sw0Dj01KTJCR6IApQ==, figureFileBig=GxFLFTRVMY3RH4pQiUBY/A==, tableContent=null), ArticleFig(id=1241779319643639851, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 5, caption=
Layering diagram of the blade, figureFileSmall=EEIimEEBs2A2JMnSdDs10Q==, figureFileBig=NofSXWXjMUN4LkdYoNof1Q==, tableContent=null), ArticleFig(id=1241779319723331628, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图5, caption=
叶片铺层示意图, figureFileSmall=EEIimEEBs2A2JMnSdDs10Q==, figureFileBig=NofSXWXjMUN4LkdYoNof1Q==, tableContent=null), ArticleFig(id=1241779319819800621, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 6, caption=
Thickness distribution of the surface layer of the traditional blade, figureFileSmall=t2GKIBNw1utZ5HT+U6Tl5A==, figureFileBig=Bv/slandjzsSl1hqXAZEsQ==, tableContent=null), ArticleFig(id=1241779319920463918, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图6, caption=
传统叶片表面铺层厚度分布, figureFileSmall=t2GKIBNw1utZ5HT+U6Tl5A==, figureFileBig=Bv/slandjzsSl1hqXAZEsQ==, tableContent=null), ArticleFig(id=1241779320016932911, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 7, caption=
Spanwise partition of the bionic blade, figureFileSmall=s2XZ2IetltZHDu3cOU8B4A==, figureFileBig=CiepQw/YrKPLmawA5OBn/g==, tableContent=null), ArticleFig(id=1241779320105013296, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图7, caption=
仿生叶片展向分区, figureFileSmall=s2XZ2IetltZHDu3cOU8B4A==, figureFileBig=CiepQw/YrKPLmawA5OBn/g==, tableContent=null), ArticleFig(id=1241779320201482289, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 8, caption=
Thickness stacking of laminates, figureFileSmall=ra2VYeuOumgzMiHzcZWCdw==, figureFileBig=GPk4Z3WU/q59HJbxfSpw/A==, tableContent=null), ArticleFig(id=1241779320297951282, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图8, caption=
层压板厚度堆叠, figureFileSmall=ra2VYeuOumgzMiHzcZWCdw==, figureFileBig=GPk4Z3WU/q59HJbxfSpw/A==, tableContent=null), ArticleFig(id=1241779320390225971, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 9, caption=
Thickness distribution of the surface layer of the bionic blade, figureFileSmall=HtGly8TO7WwEaGWNJI2z5w==, figureFileBig=zjusyibRQ7N7YaLH91T6VA==, tableContent=null), ArticleFig(id=1241779320486694964, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图9, caption=
仿生叶片表面铺层厚度分布, figureFileSmall=HtGly8TO7WwEaGWNJI2z5w==, figureFileBig=zjusyibRQ7N7YaLH91T6VA==, tableContent=null), ArticleFig(id=1241779320574775349, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 10, caption=
Numerical model of blade, figureFileSmall=NBKELTOIErUn4i4GywWAnQ==, figureFileBig=hI1eWzpMW3sY6dr+vZy9kQ==, tableContent=null), ArticleFig(id=1241779320708993078, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图10, caption=
叶片数值模型, figureFileSmall=NBKELTOIErUn4i4GywWAnQ==, figureFileBig=hI1eWzpMW3sY6dr+vZy9kQ==, tableContent=null), ArticleFig(id=1241779322223136823, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 11, caption=
Relative variation of the blade stress and 1st-order buckling factor, figureFileSmall=Q8eOYrqQ/C2oIOybgenjBA==, figureFileBig=+AWgLX+Mm+fUA7pSC/iU1Q==, tableContent=null), ArticleFig(id=1241779322307022904, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图11, caption=
叶片应力与1阶屈曲因子的相对变化量, figureFileSmall=Q8eOYrqQ/C2oIOybgenjBA==, figureFileBig=+AWgLX+Mm+fUA7pSC/iU1Q==, tableContent=null), ArticleFig(id=1241779322390908985, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 12, caption=
Finite element mesh of two kinds of blades, figureFileSmall=sQfQ2l3EQ/sQW2qVkgIbQQ==, figureFileBig=zHvlECO6vqmaEQlb6gHSOQ==, tableContent=null), ArticleFig(id=1241779322470600762, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图12, caption=
两种叶片有限元网格, figureFileSmall=sQfQ2l3EQ/sQW2qVkgIbQQ==, figureFileBig=zHvlECO6vqmaEQlb6gHSOQ==, tableContent=null), ArticleFig(id=1241779322575458363, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 13, caption=
Boundary conditions and meshes of the fluid calculation region, figureFileSmall=JHqAJMRgagGCizBdXfUmzg==, figureFileBig=QZoeJuBee3R0O+tLnTQVoA==, tableContent=null), ArticleFig(id=1241779322688704572, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图13, caption=
流体计算域边界条件及网格, figureFileSmall=JHqAJMRgagGCizBdXfUmzg==, figureFileBig=QZoeJuBee3R0O+tLnTQVoA==, tableContent=null), ArticleFig(id=1241779322764202045, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 14, caption=
Displacement distribution of traditional blades and bionic blades, figureFileSmall=6wGoVjfUTlKDbi8+O69KAg==, figureFileBig=kLC18ItpA6wBKg+n+SIbpg==, tableContent=null), ArticleFig(id=1241779322969722942, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图14, caption=
传统叶片与仿生叶片位移分布, figureFileSmall=6wGoVjfUTlKDbi8+O69KAg==, figureFileBig=kLC18ItpA6wBKg+n+SIbpg==, tableContent=null), ArticleFig(id=1241779323120717887, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 15, caption=
Spanwise displacement deformation of the blade, figureFileSmall=tOi0hWzJe09/OZvhp8f+vg==, figureFileBig=77cpYO2msojX/opjojQVdQ==, tableContent=null), ArticleFig(id=1241779323280101440, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图15, caption=
叶片展向位移形变量, figureFileSmall=tOi0hWzJe09/OZvhp8f+vg==, figureFileBig=77cpYO2msojX/opjojQVdQ==, tableContent=null), ArticleFig(id=1241779323431096385, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 16, caption=
Strain distribution of traditional blades and bionic blades, figureFileSmall=+7YLNPNnSmFw8kjsSSFH8w==, figureFileBig=KzXpz9zmQsIjnjNdu0TRqA==, tableContent=null), ArticleFig(id=1241779323514982466, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图16, caption=
传统叶片与仿生叶片应变分布, figureFileSmall=+7YLNPNnSmFw8kjsSSFH8w==, figureFileBig=KzXpz9zmQsIjnjNdu0TRqA==, tableContent=null), ArticleFig(id=1241779323611451459, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Fig. 17, caption=
Shear stress distribution of the traditional blade and the bionic blade, figureFileSmall=68YejzgUFgeTM0Sx8od8Pg==, figureFileBig=IJ/CzcFa7O1kWTW+igxG/w==, tableContent=null), ArticleFig(id=1241779323699531844, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=图17, caption=
传统叶片与仿生叶片切应力分布, figureFileSmall=68YejzgUFgeTM0Sx8od8Pg==, figureFileBig=IJ/CzcFa7O1kWTW+igxG/w==, tableContent=null), ArticleFig(id=1241779323800195141, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Tab. 1, caption=
Main parameters of NREL 5 MW wind turbine
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数Parameter | 值Value |
|---|
| 额定功率Rated power/MW | 5.0 |
| 切入风速Cut-in wind speed/(m/s) | 3.0 |
| 切出风速Cut-out wind speed/(m/s) | 25.0 |
| 额定转速Rated speed/(r/min) | 12.1 |
| 风轮直径Wind turbine diameter/m | 126 |
| 额定风速Rated wind speed/(m/s) | 11.4 |
| 叶片长度Blade length/m | 61.5 |
| 叶片质量Blade mass/kg | 17 740 |
| 轮毂高度Hub height/m | 90.0 |
| 塔架高度Tower height/m | 87.6 |
), ArticleFig(id=1241779323938607174, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=表1, caption=
NREL 5 MW风力机主要参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数Parameter | 值Value |
|---|
| 额定功率Rated power/MW | 5.0 |
| 切入风速Cut-in wind speed/(m/s) | 3.0 |
| 切出风速Cut-out wind speed/(m/s) | 25.0 |
| 额定转速Rated speed/(r/min) | 12.1 |
| 风轮直径Wind turbine diameter/m | 126 |
| 额定风速Rated wind speed/(m/s) | 11.4 |
| 叶片长度Blade length/m | 61.5 |
| 叶片质量Blade mass/kg | 17 740 |
| 轮毂高度Hub height/m | 90.0 |
| 塔架高度Tower height/m | 87.6 |
), ArticleFig(id=1241779324156710983, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Tab. 2, caption=
Laminates and mechanical properties of materials
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层合板名称 Name of laminates | 胶衣 Gelcoat(1) | 三轴向蒙皮 Triaxial skin(2) 三轴向叶根层 Triaxial blade root layer(3) | 单轴向碳纤维 Uniaxial carbon fiber(4) | 单轴向玻璃钢 Uniaxial glass fiber reinforced plastic (5) | 尾缘泡沫 Tail edge foam (6) 前缘泡沫Leading edge foam (7) 腹板泡沫Web foam (9) | 双轴向蒙皮 Biaxial skin(8) |
|---|
| 材料Material | 胶衣 Gelcoat | SNL Triax | Carbon(UD) | E-LT-5500(UD) | 泡沫Foam | Saertex(DB) |
| 叠层Lay-up | — | [±45°]2[0°]2 | [0°]2 | [0°]2 | [0°]2 | [±45°]4 |
| 厚度Thickness/mm | 0.05 | 0.94 | 0.47 | 0.47 | 1 | 1 |
| Ex/GPa | 3.44 | 27.70 | 114.50 | 41.80 | 0.256 | 13.6 |
| Ey/GPa | — | 13.65 | 8.39 | 14.00 | 0.256 | 13.3 |
| Gxy/GPa | 1.38 | 7.2 | 5.99 | 2.63 | 0.022 | 11.8 |
| νxy | 0.3 | 0.39 | 0.27 | 0.28 | 0.3 | 0.49 |
| ρ/(kg/m3) | 1 235 | 1 850 | 1 220 | 1 920 | 200 | 1 780 |
| RUTSL/GPa | — | 0.7 | 1.546 | 0.972 | — | 0.144 |
| RUCSL/GPa | — | — | 1.047 | 0.702 | — | 0.213 |
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层合板及材料力学性能参数
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层合板名称 Name of laminates | 胶衣 Gelcoat(1) | 三轴向蒙皮 Triaxial skin(2) 三轴向叶根层 Triaxial blade root layer(3) | 单轴向碳纤维 Uniaxial carbon fiber(4) | 单轴向玻璃钢 Uniaxial glass fiber reinforced plastic (5) | 尾缘泡沫 Tail edge foam (6) 前缘泡沫Leading edge foam (7) 腹板泡沫Web foam (9) | 双轴向蒙皮 Biaxial skin(8) |
|---|
| 材料Material | 胶衣 Gelcoat | SNL Triax | Carbon(UD) | E-LT-5500(UD) | 泡沫Foam | Saertex(DB) |
| 叠层Lay-up | — | [±45°]2[0°]2 | [0°]2 | [0°]2 | [0°]2 | [±45°]4 |
| 厚度Thickness/mm | 0.05 | 0.94 | 0.47 | 0.47 | 1 | 1 |
| Ex/GPa | 3.44 | 27.70 | 114.50 | 41.80 | 0.256 | 13.6 |
| Ey/GPa | — | 13.65 | 8.39 | 14.00 | 0.256 | 13.3 |
| Gxy/GPa | 1.38 | 7.2 | 5.99 | 2.63 | 0.022 | 11.8 |
| νxy | 0.3 | 0.39 | 0.27 | 0.28 | 0.3 | 0.49 |
| ρ/(kg/m3) | 1 235 | 1 850 | 1 220 | 1 920 | 200 | 1 780 |
| RUTSL/GPa | — | 0.7 | 1.546 | 0.972 | — | 0.144 |
| RUCSL/GPa | — | — | 1.047 | 0.702 | — | 0.213 |
), ArticleFig(id=1241779324441923657, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Tab. 3, caption=
Comparison of the structural properties
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| 质量 Mass/kg | 展向重心位置 Span-wise center of gravity location/m | 1阶固有频率 1st order natural frequency/Hz |
|---|
参考值 Reference value | 17 740 | 20.475 | 0.870 |
传统叶片 Traditional blade | 17 766.08 | 20.23 | 0.838 |
仿生叶片 Bionic blade | 17 725.04 | 20.90 | 1.069 |
), ArticleFig(id=1241779324567752778, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=表3, caption=
结构属性对比
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| 质量 Mass/kg | 展向重心位置 Span-wise center of gravity location/m | 1阶固有频率 1st order natural frequency/Hz |
|---|
参考值 Reference value | 17 740 | 20.475 | 0.870 |
传统叶片 Traditional blade | 17 766.08 | 20.23 | 0.838 |
仿生叶片 Bionic blade | 17 725.04 | 20.90 | 1.069 |
), ArticleFig(id=1241779324660027467, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Tal. 4, caption=
First 6-order vibration modes of the blade
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阶数 Order | 传统叶片 Traditional blade | 仿生叶片 Bionic blade |
|---|
| 1 |  |  |
| 2 |  |  |
| 3 |  |  |
| 4 |  |  |
| 5 |  |  |
| 6 |  |  |
), ArticleFig(id=1241779324777467980, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=表4, caption=
叶片前6阶模态主振型
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阶数 Order | 传统叶片 Traditional blade | 仿生叶片 Bionic blade |
|---|
| 1 |  |  |
| 2 |  |  |
| 3 |  |  |
| 4 |  |  |
| 5 |  |  |
| 6 |  |  |
), ArticleFig(id=1241779324857159757, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=EN, label=Tab. 5, caption=
Natural frequency and vibration mode
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阶数 Order | 传统叶片 Traditional blade | 仿生叶片 Bionic blade |
|---|
频率 Frequency/Hz | 模态振型 Modal vibration mode | 频率 Frequency/Hz | 模态振型 Modal vibration mode |
|---|
| 1 | 0.838 | 1阶挥舞 1st-order flapwise | 1.069 | 1阶摆振 1st-order edgewise |
| 2 | 1.092 | 1阶摆振 1st-order edgewise | 1.411 | 1阶挥舞 1st-order flapwise |
| 3 | 2.574 | 2阶挥舞 2nd-order flapwise | 3.528 | 2阶挥舞 2nd-order flapwise |
| 4 | 3.867 | 2阶摆振 2nd-order edgewise | 3.854 | 2阶摆振 2nd-order edgewise |
| 5 | 5.139 | 挥舞+扭转 Flapwise and torsion | 6.048 | 3阶挥舞 3rd-order flapwise |
| 6 | 5.761 | 2阶扭转 2nd-order torsion | 7.216 | 2阶摆振 2nd-order edgewise |
), ArticleFig(id=1241779324999766094, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1241699533080556413, language=CN, label=表5, caption=
固有频率及振型
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阶数 Order | 传统叶片 Traditional blade | 仿生叶片 Bionic blade |
|---|
频率 Frequency/Hz | 模态振型 Modal vibration mode | 频率 Frequency/Hz | 模态振型 Modal vibration mode |
|---|
| 1 | 0.838 | 1阶挥舞 1st-order flapwise | 1.069 | 1阶摆振 1st-order edgewise |
| 2 | 1.092 | 1阶摆振 1st-order edgewise | 1.411 | 1阶挥舞 1st-order flapwise |
| 3 | 2.574 | 2阶挥舞 2nd-order flapwise | 3.528 | 2阶挥舞 2nd-order flapwise |
| 4 | 3.867 | 2阶摆振 2nd-order edgewise | 3.854 | 2阶摆振 2nd-order edgewise |
| 5 | 5.139 | 挥舞+扭转 Flapwise and torsion | 6.048 | 3阶挥舞 3rd-order flapwise |
| 6 | 5.761 | 2阶扭转 2nd-order torsion | 7.216 | 2阶摆振 2nd-order edgewise |
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