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Daneshbod, Younes
- The Public Hydraulic Evaluation of Flood Waves and Math Routing Operational in Wide Rivers (Case Study:Mond River)
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Authors
Affiliations
1 Department of Civil Engineering, Arsanjan branch, Islamic Azad University, Arsanjan, IR
1 Department of Civil Engineering, Arsanjan branch, Islamic Azad University, Arsanjan, IR
Source
International Journal of Science, Engineering and Computer Technology, Vol 8, No 2-4 (2018), Pagination: 90-97Abstract
In this study choosing an interval of Mond and Aghaj River, some hydro logic and hydraulic flood routing methods Such as Muskingum, Modified Att-Kin, Kinematic Wave, Diffusion Wave and Dynamic Wave Model are investigated. Also, complete studies were done on flood plain and flood flow through Mikel 1 and Excel program. Then validation of each model's result was performed using statistical measures. Finally the best method for flood routing was proposed. Results show that Muskmgumcorrelation coefficient method best accommodates to observational flood results and provides the least error in predicting flood hydrograph. Results also showed a significant superiority for dynamic wave model of mike 11 Software. According to the project's results, in the case of hydraulic information determinacy, dynamic wave model of mike 11 Software; and if using hydraulic models (according to historical record of previous floods), Muskingum model on correlation coefficient pattern in simulating flood waves and flood routing in natural streams are recommended.Keywords
Flood Numerical Routing, Hydrograph Analysis, Numerical Method, Flood Simulation.
References
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- The Vibrations of a Piezoelectric Functionally Graded Material (FGM) Beam Have Been Analyzed in a Thermal Field Under Various Boundary Conditions and a Harmonic Moving Force
Abstract Views :447 |
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Authors
Affiliations
1 Department of Mechanical Engineering, Islamic Azad University, Arsanjan Branch, Arsanjan, IR
1 Department of Mechanical Engineering, Islamic Azad University, Arsanjan Branch, Arsanjan, IR
Source
International Journal of Science, Engineering and Computer Technology, Vol 8, No 2-4 (2018), Pagination: 80-89Abstract
In this paper, the vibrations of a piezoelectric functionally graded material (FGM) beam have been analyzed in a thermal field under various boundary conditions and a harmonic moving force. In order to achieve the objectives of this study, governing equations of piezoelectric FGM beam dynamics under a thermal field and various boundary conditions were obtained using the Euler-Bernoulli Theory. Furthermore, results were analyzed using Differential Quadrature numerical method, through which various boundary conditions, including double-fixed, fixed-pinned, pinned-fixed and double-pinned were obtained. In addition, properties of the functionally graded composite material were assumed as a function of beam thickness. Results indicated that increasing the volume fraction of functionally graded materials causes an increase in beam displacement. It was also observed that all-steel beams underwent larger displacements, compared to all-ceramic beams. Additionally, the piezoelectric effect reduced system displacement by causing an increase in the stiffness matrix in the governing equation. Results also showed that higher temperature variations caused larger system drifts. On the other hand, increasing force velocity lead to a higher resulting stress, and consequently, larger beam displacements. Moreover, it was deduced that beam displacement is directly correlated to the beam length parameter, such that larger beam spans result in larger system displacements. Reducing the volume fraction of functional material causes an upsurge in the moving force critical velocity. On the other hand, temperature variations are associated with smaller critical velocities of moving forces and the occurrence of critical velocities at smaller amounts. However, piezoelectricity results in higher critical velocities of the moving force; and therefore, critical velocity will occur at higher amounts. Double-pinned boundary conditions resulted in larger displacements, in comparison to other boundary conditions. Changing the boundary conditions resulted in different amounts of displacement; through which higher system stiffness, andhence, smaller system drifts couldbe achieved.Keywords
Vibrations, Piezoelectric Beam, Functionally Graded Material, Boundary Conditions, Thermal Fields.References
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