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Findings on Mechanical Engineering Discussed by M. Sahin and Co-Researchers

June 25, 2014

By a News Reporter-Staff News Editor at Journal of Engineering -- Current study results on Mechanical Engineering have been published. According to news reporting originating from Ankara, Turkey, by VerticalNews editors, the research stated, "The governing dynamic equilibrium equation of N-story periodic shear structure with arbitrary top-story mass, arbitrary base-story stiffness, and that is subjected to base excitation is given in the form of a constant coefficient second-order finite-difference equation. The first integration of the governing difference equation for the eigenanalysis results in the Volterra difference equation of convolution type and yields the first boundary condition."

Our news editors obtained a quote from the research, "The z-transform method is applied to the equation to obtain the general solution for displacement mode shapes. Applying the second boundary condition to the general solution results in the characteristic equation in which the frequencies are obtained by solving it. The general form of the characteristic equation for eigenfrequencies is presented, and analytical solutions for some special cases are derived. Displacement and drift mode shape functions are obtained."

According to the news editors, the research concluded: "All the modal parameters, including modal mass, excitation factor, participation factor, and effective modal mass, are derived using the sum and the sum of the square modal displacements and are presented as closed-form solutions."

For more information on this research see: Application of z-Transform Method for Dynamic Analysis of Periodic Shear Structures. Journal of Engineering Mechanics, 2014;140(5):37-48. Journal of Engineering Mechanics can be contacted at: Asce-Amer Soc Civil Engineers, 1801 Alexander Bell Dr, Reston, VA 20191-4400, USA.

The news editors report that additional information may be obtained by contacting M. Sahin, Turksat AS, TR-06839 Ankara, Turkey.

Keywords for this news article include: Ankara, Turkey, Eurasia, Mechanical Engineering

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Source: Journal of Engineering

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