Study on Design of Elastic Support for Wind Turbine

In this paper, the 2MW generator system is taken as an example. Firstly, the modal frequency of the system is obtained by theoretical calculation, FEA analysis and experimental test. The comparison of the three methods shows that the system frequency is calculated by using the mass point and rigid beam simplified generator model. It has a certain reliability, and greatly simplifies the selection of the elastic support of the wind turbine. Secondly, the DOE method is used to analyze the sensitivity of the wind turbine’s elastic support stiffness by the integration of ABAQUS and Isight software. Finally, the stiffness is optimized by algorithm. This is the first time that the method of designing the elastic support for wind turbine is deeply studied, which provides a scientific reference for the reasonable selection

OPTIMIZATION DESIGN OF TOWER DOOR STRUCTURE BASED ON ISIGHT

In the multidisciplinary optimization ISIGHT software environment,the comprehensive application of PRO / E parametric-modeling function and ABAQUS FEA function establish a framework of CAD / CAE integrated optimization design for tower door. Firstly,the parametric geometric model of door is built,Secondly,the FEA model is established and submitted. The interaction effects and the correlation factor between the geometric parameters and stress are analyzed by the DOE method of optimal LHD algorithm. Static strength optimization design of door is done by the ASA global optimization algorithm. The whole tower weight is as objection,the can strength the optimal design solutions of the door is gotten. The paper provides a scientific design method for strength optimization design of the tower door

Chem.-Eur. J.

A new type of "task specific ionic liquid", tetrabutylphosphonium amino acid [P(C-4)(4)][AA], was synthesized by the reaction of tetrabutylphosphonium hydroxide [P(C-4)(4)][OH] with amino acids, including glycine, L-alanine, L-p-alanine, L-serine, and L-lysine. The liquids produced were characterized by NMR, IR spectroscopies, and elemental analysis, and their thermal decomposition temperature, glass transition temperature, electrical conductivity, density, and viscosity were recorded in detail. The [P(C-4)(4)][AA] supported on porous silica gel effected fast and reversible CO2 absorption when compared with bubbling CO, into the bulk of the ionic liquid. No changes in absorption capacity and kinetics were found after four cycles of absorption/ desorption. The CO2 absorption capacity at equilibrium was 50 mol % of the ionic liquids. In the presence of water (1 wt%), the ionic liquids could absorb equimolar amounts Of CO2. The CO2 absorption mechanisms of the ionic liquids with and without water were different.A new type of "task specific ionic liquid", tetrabutylphosphonium amino acid [P(C-4)(4)][AA], was synthesized by the reaction of tetrabutylphosphonium hydroxide [P(C-4)(4)][OH] with amino acids, including glycine, L-alanine, L-p-alanine, L-serine, and L-lysine. The liquids produced were characterized by NMR, IR spectroscopies, and elemental analysis, and their thermal decomposition temperature, glass transition temperature, electrical conductivity, density, and viscosity were recorded in detail. The [P(C-4)(4)][AA] supported on porous silica gel effected fast and reversible CO2 absorption when compared with bubbling CO, into the bulk of the ionic liquid. No changes in absorption capacity and kinetics were found after four cycles of absorption/ desorption. The CO2 absorption capacity at equilibrium was 50 mol % of the ionic liquids. In the presence of water (1 wt%), the ionic liquids could absorb equimolar amounts Of CO2. The CO2 absorption mechanisms of the ionic liquids with and without water were different

Optimization and Comparative Study of Different Extraction Methods of Sixteen Fatty Acids of <i>Potentilla anserina</i> L. from Twelve Different Producing Areas of the Qinghai-Tibetan Plateau

In this study, supercritical fluid extraction (SFE), ultrasonic-assisted extraction (UAE), and microwave-assisted extraction (MAE) were applied to explore the most suitable extraction method for fatty acids of Potentilla anseris L. from 12 different producing areas of the Qinghai-Tibetan Plateau. Meanwhile, the important experimental parameters that influence the extraction process were investigated and optimized via a Box-Behnken design (BBD) for response surface methodology (RSM). Under optimal extraction conditions, 16 fatty acids of Potentilla anserina L. were analyzed via high-performance liquid chromatography (HPLC) with fluorescence detection, using 2-(4-amino)-phenyl-1-hydrogen-phenanthrene [9,10-d] imidazole as the fluorescence reagent. The results showed that the amounts of total fatty acids in sample 6 by applying SFE, UAE, and MAE were, respectively, 16.58 ± 0.14 mg/g, 18.11 ± 0.13 mg/g, and 15.09 ± 0.11 mg/g. As an environmental protection technology, SFE removed higher amounts of fatty acids than did MAE, but lower amounts of fatty acids than did UAE. In addition, the contents of the 16 fatty acids of Potentilla anserina L. from the 12 different producing areas Qinghai-Tibetan Plateau were significantly different. The differences were closely related to local altitudes and to climatic factors that corresponded to different altitudes (e.g., annual mean temperature, annual mean precipitation, annual evaporation, annual sunshine duration, annual solar radiation.). The temperature indices, photosynthetic radiation, ultraviolet radiation, soil factors, and other factors were different due to the different altitudes in the growing areas of Potentilla anserina L., which resulted in different nutrient contents