ig风力发电机叶片:设计规范、材料、制作工艺、结构强度、雷电保护、认证规范运输运行中的质检标准.doc
《ig风力发电机叶片:设计规范、材料、制作工艺、结构强度、雷电保护、认证规范运输运行中的质检标准.doc》由会员分享,可在线阅读,更多相关《ig风力发电机叶片:设计规范、材料、制作工艺、结构强度、雷电保护、认证规范运输运行中的质检标准.doc(18页珍藏版)》请在得力文库 - 分享文档赚钱的网站上搜索。
1、【精品文档】如有侵权,请联系网站删除,仅供学习与交流ig风力发电机叶片:设计规范、材料、制作工艺、结构强度、雷电保护、认证规范 运输运行中的质检标准.精品文档.Structural collapse of a wind turbine blade. Part A: Static test and equivalent single layered modelsComposites Part A: Applied Science and ManufacturingThe overall objective is a top-down approach to structural instabil
2、ity phenomena in wind turbine blades, which is used to identify the physics governing the ultimate strength of a generic wind turbine blade under a flap-wise static test. The work is concerned with the actual testing and the adoption of a phenomenological approach, and a discussion is conducted to a
3、ssess and evaluate the wind turbine blade response during loading and after collapse by correlating experimental findings with numerical model predictions. The ultimate strength of the blade studied is governed by instability phenomena in the form of delamination and buckling. Interaction between bo
4、th instability phenomena occurs causing a progressive collapse of the blade structure.Linear vibration analysis of rotating wind-turbine bladeCurrent Applied PhysicsIn the wind-turbine design, linear vibration analysis of the wind-turbine blade should be performed to get vibratory characteristics an
5、d to avoid structural resonance. EOM (equations of motion) for the blade are derived and vibratory characteristics of a rotating blade are observed and discussed in this work. Linear vibration analysis requires the linearized EOM with DOF (degree of freedom). For the system with large DOF, the deriv
6、ation and linearization of EOM are very tedious and difficult. Constrained multi-body technique is employed to derive EOMs to alleviate this burden. It is well known that natural frequencies and corresponding modes vary as rotating velocity changes. At the operating condition with relatively high ro
7、tating velocity, almost all commercial programs cannot predict the blade frequencies accurately. Numerical problems were solved to verify the accuracy of the proposed method. Through the numerical problems, this work shows that the proposed method is useful to predict the vibratory behavior of the r
8、otating blade. Furthermore, a numerical problem was solved to check the numerical accuracy of commercial program results within operating region.Aero-elastic behavior of a flexible blade for wind turbine application: A 2D computational studyEnergyThis paper presents a computational study into the st
9、atic aeroelastic response of a 2D wind turbine airfoil under varying wind conditions. An efficient and accurate code that couples the X-Foil software for computation of airfoil aerodynamics and the MATLAB PDE toolbox for computation of the airfoil deformation is developed for the aero-elastic comput
10、ations. The code is validated qualitatively against computational results in literature. The impact of a flexibility of the airfoil is studied for a range of design parameters including the free stream velocity, pitch angle, airfoil thickness, and airfoil camber. Static aero-elastic effects have the
11、 potential to improve lift and the lift over drag ratio at off-design wind speed conditions. Flexibility delays stall to a large pitch angle, increasing the operating range of a flexible blade airfoil. With increased thickness the airfoil deformation decrease only linearly.Technical cost modelling f
12、or a generic 45-m wind turbine blade producedby vacuum infusion (VI)Renewable EnergyA detailed technical cost analysis has been conducted on a generic 45-m wind turbine blade manufactured using the vacuum infusion (VI) process, in order to isolate areas of significant cost savings. The analysis has
13、focused on a high labour cost environment such as the UK and investigates the influence of varying labour costs, programme life, component area, deposition time, cure time and reinforcement price with respect to production volume. A split of the cost centres showed the dominance of material and labo
14、ur costs at approximately 51% and 41%, respectively. Due to the dominance of materials, it was shown that fluctuations in reinforcement costs can easily increase or decrease the cost of a turbine blade by up to 14%. Similarly, improving material deposition time by 2h can save approximately 5% on the
15、 total blade cost. However, saving 4h on the cure cycle only has the potential to provide a 2% cost saving.A cost and performance comparison of LRTM and VI for the manufacture of large scale wind turbine bladesRenewable EnergyLight resin transfer moulding (LRTM) has been developed as an alternative
16、to vacuum infusion (VI) but a direct comparison between the two processes is needed to quantify any advantages. This paper uses a technical cost model and an empirical study to show the potential financial and performance benefits of LRTM for manufacture of a generic 40m wind turbine blade shell. Th
17、e use of LRTM when compared to VI demonstrated a possible 3% cost saving, improved dimensional stability (5.5%), and reductions in resin wastage (3%) and infusion time (25%). A decrease in internal void formation (0.9%) resulted in an increase in mechanical performance (4%) for LRTM moulded parts.Po
18、wer curve control in micro wind turbine designIn this work, a micro wind turbine will be designed and built for a series of wind tunnel tests (rotor dynamics and Wind Turbine (WT) start-up velocity). Its design stems from an original numerical code, developed by the authors, based on the Blade Eleme
19、nt Momentum (BEM) Theory. From classic design criteria, having evaluated all the geometric characteristics, an innovative methodology will be shown for controlling the power curve of the wind turbine. Indications will be supplied in order to modify various sections of the power curve and so as to de
20、sign the turbine according to its practical application.微小型风力发电机组的输出电能能源曲线控制Performance effects of attachment on blade on a straight-bladed vertical axis wind turbine直线型垂直轴风力发电机叶片工作效能及其附件选配Current Applied PhysicsRecently, many straight-bladed vertical axis wind turbines (SB-VAWT) are installed in co
21、mmunity, urban and high mountain areas as an independent power supply. However, in cold climates, icing, snow and other attachments on the blade surface may affect turbine performance. In this study, the condition of rime-type icing on the leading edge of blade surface was simulated by clay, and the
22、 effects on the rotation and power performance were measured by wind tunnel tests and discussed. The results show that the attachment reduced the steady revolution and power coefficient of the SB-VAWT, and the reduction rate increased as the weight of the attachment and wind speed increased.A method
23、ology for the structural analysis of composite wind turbine blades under geometric and material induced instabilitiesComputers & StructuresThe objective of this work is to develop a modeling strategy for the structural analysis of large three-dimensional laminated composite structures undergoing geo
24、metric and material induced instability. A sub-modeling approach is used with multiple mixed-mode linear-softening cohesive elements and linear-elastic solid-shell elements through the thickness. A localized sub-plane control strategy is adopted for tracking multiple crack formations and the propaga
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ig风力发电机叶片:设计规范、材料、制作工艺、结构强度、雷电保护、认证规范 运输运行中的质检标准 ig 风
链接地址:https://www.deliwenku.com/p-15035242.html
限制150内