Vibration Analysis of Layered Composite Beam According to Wind Turbine Blades of Variable Cross - Section
Ceyda Okta,
Gökmen Atlıhan,
Ö. Altan Dombaycı
Issue:
Volume 7, Issue 1-1, January 2018
Pages:
1-7
Received:
3 July 2017
Accepted:
10 July 2017
Published:
2 August 2017
DOI:
10.11648/j.ijmsa.s.2018070101.11
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Abstract: In this study, for wind turbine blades of variable cross-section vibration analysis of composite beams has been investigated analytically and numerically. Bernoulli composite beam theory used in the analytical part of the beam and the effect of the shear force from the beam has been neglected. A composite beam was created from layers 8. In the numerical part of the study, using finite element method and ANSYS program were used. As result of calculations, without changing the geometry of the beam, it is observed that the natural frequency can be changed by changing the layer angle of the stratified composite beam.
Abstract: In this study, for wind turbine blades of variable cross-section vibration analysis of composite beams has been investigated analytically and numerically. Bernoulli composite beam theory used in the analytical part of the beam and the effect of the shear force from the beam has been neglected. A composite beam was created from layers 8. In the nume...
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Simulation of Single-Diode Equivalent Model of Polycrystalline Silicon Solar Cells
Beddiaf Zaidi,
Izzeddine Saouane,
Chander Shekhar
Issue:
Volume 7, Issue 1-1, January 2018
Pages:
8-10
Received:
29 August 2017
Accepted:
30 August 2017
Published:
31 August 2017
DOI:
10.11648/j.ijmsa.s.2018070101.12
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Views:
Abstract: A solar module is composed of photons of different energies, and some are absorbed at the p-n junction. A single-diode equivalent model is used to describe the electronic properties of solar cells. The theory as well as the construction and working of photovoltaic cells using single-diode method are also presented. So, choosing a electrical equivalent model can is based on area in which we would like to realize for study of solar cell characteristics. Parameters solar cell (Short-Circuit Current, Open-Circuit Voltage) are changed due to changing the light intensity and temperature. In the current paper we present the effect of temperature, series resistance and shunt resistance on the (P-V) characteristics simulated in Matlab/Simulink.
Abstract: A solar module is composed of photons of different energies, and some are absorbed at the p-n junction. A single-diode equivalent model is used to describe the electronic properties of solar cells. The theory as well as the construction and working of photovoltaic cells using single-diode method are also presented. So, choosing a electrical equival...
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Preparation and Characterization of Phosphate Material Doped with Chromium
Youssef Makhkhas,
Saida Krimi,
Mohamed Taibi,
El Hassan Sayouty
Issue:
Volume 7, Issue 1-1, January 2018
Pages:
11-17
Received:
1 October 2017
Accepted:
10 October 2017
Published:
7 November 2017
DOI:
10.11648/j.ijmsa.s.2018070101.13
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Views:
Abstract: The paper reports a study on phosphate glasses containing Chromium, Iron and Sodium oxides. The phosphate glasses have been obtained in air by direct melting of Cr2O3, Fe2O3, Na2CO3, and (NH4)2HPO4. The preparation temperature is 1020°C. After annealing at 650°C for 48h, the glasses were partially crystallized and contained β-CrPO4 and Fe3(P2O7)2 crystalline phases. We have performed the measurement of X-Ray diffraction, and Infra-Infra-Red spectroscopy. The differential scanning calorimetry (DSC) was used in this work to determine the glass transition and the crystallization temperatures (Tg and Tc). We noticed that the Tg and Tc depends on the composition of the samples. The chemical durability was evaluated by weight losses of glass samples after immersion in hot distilled water at 90°C for 30 days. Weight loss measurements showed a good chemical durability against water and enhance the glass capacity to embed different chemical compounds. The density and molar volume were also measured.
Abstract: The paper reports a study on phosphate glasses containing Chromium, Iron and Sodium oxides. The phosphate glasses have been obtained in air by direct melting of Cr2O3, Fe2O3, Na2CO3, and (NH4)2HPO4. The preparation temperature is 1020°C. After annealing at 650°C for 48h, the glasses were partially crystallized and contained β-CrPO4 and Fe3(P2O7)2 c...
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