TR-Dizin İndeksli Yayınlar Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.12573/396
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Article Numerical Investigation of Sloshing with Baffles Having Different Elasticities(2020) Demir, Abdullah; Dinçer, Ali ErsinLiquid tanks are indispensable members of civil engineering structures like liquidpetroleum gas storage tanks and aerospace structures. Fluids can act unpredictablyunder earthquake excitation or dynamic loads. Loads applied to tank changes duringmotion and there can be deformations at the tank or even at the structure where thetank is placed. This is called sloshing and many researchers study the behavior of it.In this research, behavior of baffles having different elastic modulus is investigatedby a fluid-structure interaction (FSI) method. The numerical method is a fully coupled FSI method proposed by the authors, recently. The method, which is verified bymany problems, uses smoothed particle hydrodynamics (SPH) for fluid domain, finiteelement method (FEM) for structural domain and contact mechanics for coupling ofthese two domains. In analysis, a tank and a baffle having constant initial geometryare excited by harmonic motions. Elasticity of baffle is changed to investigate the effect on sloshing. Results show that tip displacement of baffle has linear relation withits elasticity for higher rigidities. In contrast, tip displacement of baffle has constanttip displacement for lower rigidities.Article Methods for Multi-Segment Continuous Cable Analysis(2023-06-20) Demir, Abdullah; Polat, UgurCables are invaluable members for some applications of engineering. The specialty is due to its behavior under transverse loads. Having almost no rigidity in transverse direction makes cables different from other structural elements. In most applications, cables are assumed to be two force members. However, not only its weight but also its application with roller supports makes them different structural elements. Generally, cables are assembled as single-segmented cables (SSC) where they are fixed at their ends. However, in most of the SSC applications, cables have intermediate supports which can be rollers or sliders. These type of cable applications are called as multi-segment continuous cables (MSCC). In MSCC systems, the cable fixed at its ends and supported by a number of intermediate rollers. Total length of cable is constant, and the intermediate supports are assumed to be frictionless and stationary. In this prob-lem, the critical issue is to find the distribution of the cable length among the segments in the final equilibrium state, so reactions at all supports can be found. Two methods are proposed for the segment length adjustment based on the stress continuity among the cable. These methods are named as direct stiffness method and tension distribu-tion method (relaxation method). Results calculated from the proposed methods are verified by both the reference benchmark problems and commercial finite element program.