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A higher order coupled frequency characteristics study of smart magneto-electro-elastic composite plates with cut-outs using finite element methods

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Defence Technology（防务技术） 2021年第1期17卷 100-118页

作者： M.Vinyas D.Harursampath T.Nguyen Thoi Nonlinear Multifunctional Composites Analysis and Design(NMCAD)Laboratory Department of Aerospace EngineeringIndian Institute of ScienceBangalore560012India Division of Computational Mathematics and Engineering Institute for Computational ScienceTon Duc Thang UniversityHo Chi Minh CityViet Nam Faculty of Civil Engineering Ton Duc Thang UniversityHo Chi Minh CityViet Nam

This article deals with investigating the effect of cut-outs on the natural frequencies of magneto-electroelastic(MEE)plates incorporating finite element methods based on higher order shear deformation theory(HSDT).In order to consider the influence of cut-out,the energy of the cut-out domain is subtracted from the total energy of the entire *** governing equations of motions are derived through incorporating Hamilton’s principle and the solution is obtained using condensation *** proposed numerical formulation is verified with the results of previously published literature as well as the numerical *** addition,this research focuses on evaluating the effect of geometrical skewness and boundary conditions on the frequency *** influence of cut-outs on the degree of coupling between magnetic,electric and elastic fields is also investigated.

关键词： cut-out Magneto-electro-elastic Natural frequency Higher order shear deformation Coupling

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Theoretical Study of Wind Turbine Model with a New Concept on Swept Area

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Energy and Power Engineering 2015年第4期7卷 127-134页

作者： Sagarkumar M. Agravat N. V. S. Manyam Sanket Mankar T. Harinarayana Gujarat Energy Research and Management Institute Gandhinagar India Department of Electrical Engineering University of Petroleum and Energy Studies Dehradun India School of Mechanical and Building Sciences Vellore Institute of Technology Vellore India

Commercially available wind-turbines are optimized to operate at certain wind velocity, known as rated wind velocity. For other values of wind velocity, it has different output which is lower than the rated output of the wind plant. Wind mill can be designed to provide maximum power output at different wind velocities through modification of swept area to match with the wind speed available at the moment. This can result in higher power output at all the velocities except that at rated wind speed because of limitation of generator. This results in increased utilization of generation capacity of wind mill compared to its commercially designed counterpart. A theoretical simulation has been done to prove a new concept about swept area of wind turbine blade which results in a significant increase in the power output through the year. Simulation results of power extracted through normal wind blade design and new concept are studied and compared. The findings of the study are presented in graphical and tabular form. Study establishes that there can be a significant gain in the power output with the new concept.

关键词： cut-In Wind-Speed cut-out Wind-Speed CUF Swept Area Radius Chord Aerofoil Axial Flow Induction Factor Inflow Factor Actuator Disc Concept Momentum Theory

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4K技术在电视台高清演播室系统中的应用实践

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现代电视技术 2015年第10期 92-93,98页

作者：陈卫华甘肃省银川市广播电视台

随着电视技术"超高清"时代的到来,4K技术日渐成熟,相应的技术设备也已进入实用阶段。本文以实际系统设计为例,旨在探讨如何在高清系统中适当采用4K技术和设备来提升现有高清系统的制作能力和技术品质。

关键词：分辨率高清 HD 4K cut-out

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