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http://dx.doi.org/10.9712/KASS.2018.18.3.83

Dynamic Stability and Semi-Analytical Taylor Solution of Arch With Symmetric Mode  

Pokhrel, Bijaya P. (Dept. of Architectural Eng., Korea University of Technology and Education)
Shon, Sudeok (Dept. of Architectural Eng., Korea University of Technology and Education)
Ha, Junhong (School of Liberal Arts, Korea University of Technology and Education)
Lee, Seungjae (Dept. of Architectural Eng., Korea University of Technology and Education)
Publication Information
Journal of Korean Association for Spatial Structures / v.18, no.3, 2018 , pp. 83-91 More about this Journal
Abstract
In this study, we investigated the dynamic stability of the system and the semi-analytical solution of the shallow arch. The governing equation for the primary symmetric mode of the arch under external load was derived and expressed simply by using parameters. The semi-analytical solution of the equation was obtained using the Taylor series and the stability of the system for the constant load was analyzed. As a result, we can classify equilibrium points by root of equilibrium equation, and classified stable, asymptotical stable and unstable resigns of equilibrium path. We observed stable points and attractors that appeared differently depending on the shape parameter h, and we can see the points where dynamic buckling occurs. Dynamic buckling of arches with initial condition did not occur in low shape parameter, and sensitive range of critical boundary was observed in low damping constants.
Keywords
Symmetric mode; Shallow arches; Multistep Taylor method; Semi-analytical solution; Dynamic snapping; Equilibrium point; Asymptotical stable;
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