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flexural vibration of submarine propeller shaft using distributed lumped modeling technique
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نویسنده
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soheili saeed ,khatami mohammad ali
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منبع
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دريا فنون - 1401 - دوره : 9 - شماره : 2 - صفحه:118 -126
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چکیده
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This paper investigates the flexural vibration of timoshenko beams using hybrid modeling. the timoshenko beam equation is solved by a new analytical method, and then modeled as a series of interconnected distributed and lumped elements. natural frequencies of a uniform beam with various boundary conditions are calculated using the distributed lumped modeling technique (dlmt). the results obtained by this method are verified with the results of other techniques. the method is then employed for calculating natural frequencies of a submarine propeller shaft using timoshenko beam theory. the results are compared and verified with frequencies and mode shapes obtained by fem using ansys software. the frequencies obtained by dlmt and fem are differed less than 5 percent, which confirms the dlmt results. it is shown that the presented method provides accurate results, while it can be simply and effectively applied to the complicated systems.
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کلیدواژه
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flexural vibration ,timoshenko beam ,distributed-lumped modeling technique (dlmt) ,submarine propeller shaft.
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آدرس
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mashhad branch, islamic azad university, department of mechanical engineering, iran, quchan university of technology, department of mechanical engineering, iran
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پست الکترونیکی
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a.khatami1391@gmail.com
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Flexural Vibration of Submarine Propeller Shaft Using Distributed Lumped Modeling Technique
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Authors
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Soheili Saeed ,Khatami Mohammad Ali
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Abstract
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This paper investigates the flexural vibration of Timoshenko beams using hybrid modeling. The Timoshenko beam equation is solved by a new analytical method, and then modeled as a series of interconnected distributed and lumped elements. Natural frequencies of a uniform beam with various boundary conditions are calculated using the distributed lumped modeling technique (DLMT). The results obtained by this method are verified with the results of other techniques. The method is then employed for calculating natural frequencies of a submarine propeller shaft using Timoshenko beam theory. The results are compared and verified with frequencies and mode shapes obtained by FEM using ANSYS software. The frequencies obtained by DLMT and FEM are differed less than 5 percent, which confirms the DLMT results. It is shown that the presented method provides accurate results, while it can be simply and effectively applied to the complicated systems.
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Keywords
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