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Item type:Publication, Access status: without files , The influence of surrounding temperatures on dynamic characteristics of circular cylindrical shellIt can be considered that the knowledge of the vibration characteristics of any structure/ machine is essential element to the design engineers to obtain a successful design by avoiding the failures or reducing the performance in some mechanical systems. Circular cylindrical shells one type of these structures, where they are used widely in various sectors of engineering applications such as rocketry, motors, missiles (electrical type), etc. It was found in the industrial sector that the vibration (high noise) appeared in different applications, where these vibrations have a negative influence on the performance and behavior of the mechanical systems. Mostly, the status of these mechanical systems will be changed from stable to unstable when they work under such conditions for sufficient period. Finally, the mechanical system will be failed before the designed time. In this research paper, it will be investigated deeply the vibration characteristics of cylindrical shells that made from Stainless Steel. Finite element technique was applied to find out the effect of the temperature on the vibration characteristics of cylindrical shells. Also, the results showed what is the influence of change the thickness of the cylindrical shells on the characteristics of vibration.Publicationtype: Journal Article91 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Industrial tracking camera and product vision detection system(Zibeline International Publishing, 2019-09-12); ; Many industrial and commercial applications today are beginning to use autonomous systems to increase productivity and reduce costs for production and manpower. Most of these applications are only semi- autonomous, it still needs assistance from a human to start up or receive continual instructions. It can be improve the productivity using the image processing techniques based on the camera processing capabilities and more efficient vehicles. This research paper describes a vision tracking system platform and USB camera that used to make a distinguishing operation applying to real-time video tracking processing for moving product. The industrial camera tracking system is designed to provide tracking and sorting for the products based on the shape quality criterion, which is means reject the product with low quality (bad shape). The platform is used to distinguish different shapes of products and tracking operation. The received video is displayed in the computer through the acquisition video, taking advantage of the toolkit for acquisition video and image processing. It can be determined where the place of the part and detect the product, and then send information to the control system to remove unwanted product.Publicationtype: Journal ArticleScopus© Citations 5 366 591 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Stress and vibration analyses of the wind turbine blade (A NREL 5MW)Owing to the fast development in the energy filed, the demand is increasing to improve energy efficiency and lifetime of wind turbine. Therefore, it's important to understand deeply the behavior of wind turbine under different load conditions. This research paper provides an approach to study and analyze the stresses and deformations under the steady-state condition. Also, it was investigated the vibration characteristics of the NREL offshore 5-MW blade (HAWT) with a long of (61.5 m) and with rotor diameter (126 m). The 3D model of wind turbine blade was created by using SOLIDWORKS and then exported to ANSYS/Workbench19 in order to achieve the numerical simulation based on Finite element method. The steady-state analysis of the selected wind turbine blade was performed at maximum rated power (maximum rotation velocity =12.1 rpm). In this work, three different materials (E-glass fiber, Kevlar, and Carbon fiber reinforced plastic) were selected to build the body of the wind blade parts. The results presented the von-Mises stresses, total deformations, first ten natural frequencies and mode shapes of NREL 5-MW wind turbine blade. In steady-state analysis, it was found that the optimum material was (CFRP) where the minimum level of stresses occurred. In vibration analysis, it was found the material that has a higher structural stiffness is CFRP material which avoids high frequencies and mode shapes.Publicationtype: Journal ArticleScopus© Citations 12 899 1926