{"title":"Mechanism of Damping in Welded Structures using Finite Element Approach","authors":"B. Singh, B. K. Nanda","volume":39,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":346,"pagesEnd":351,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/15455","abstract":"The characterization and modeling of the dynamic\r\nbehavior of many built-up structures under vibration conditions is still\r\na subject of current research. The present study emphasizes the\r\ntheoretical investigation of slip damping in layered and jointed\r\nwelded cantilever structures using finite element approach.\r\nApplication of finite element method in damping analysis is relatively\r\nrecent, as such, some problems particularly slip damping analysis has\r\nnot received enough attention. To validate the finite element model\r\ndeveloped, experiments have been conducted on a number of mild\r\nsteel specimens under different initial conditions of vibration. Finite\r\nelement model developed affirms that the damping capacity of such\r\nstructures is influenced by a number of vital parameters such as;\r\npressure distribution, kinematic coefficient of friction and micro-slip\r\nat the interfaces, amplitude, frequency of vibration, length and\r\nthickness of the specimen. Finite element model developed can be\r\nutilized effectively in the design of machine tools, automobiles,\r\naerodynamic and space structures, frames and machine members for\r\nenhancing their damping capacity.","references":"[1] B. M. Belgaumkar, and A. S. R. Murty, \"Effect of root fixture conditions\r\non the damping characteristics of cantilever beam,\" Journal of science\r\nand Engineering research, India, vol. 12, no.1, pp.147-154, 1968.\r\n[2] M. Masuko, I. Yoshimi, and Y. Keizo, \"Theoretical analysis for a\r\ndamping ration of a jointed cantibeam,\" Bull. JSME, vol. 16, no.99, pp.\r\n1421-1433, 1973.\r\n[3] N. Nishiwaki, M. Masuko, Y. Ito, and I. Okumura, \"A study on damping\r\ncapacity of a jointed cantilever beam (1st report; experimental results),\"\r\nBulletin of JSME, vol. 21, no. 153, pp. 524-531, 1978.\r\n[4] B.P. Shastry, and G.V. Rao, \"Dynamic stability of a cantilever column\r\nwith an intermediate concentrated periodic load,\" Journal of Sound and\r\nVibration, vol. 113, pp. 194 - 197, 1987.\r\n[5] O.A. Bauchau, and C.H. Hong, \"Nonlinear response and stability analysis\r\nof beams using finite elements in time,\" AIAA Journal, vol. 26, pp. 1135-\r\n1141, 1998.\r\n[6] G. Briseghella, C.E. Majorana, and C. Pellegrino, \"Dynamic stability of\r\nelastic structures: a finite element approach,\" Computer and structures,\r\nvol. 69, pp. 11-25, 1998.\r\n[7] M. G. Sainsbury, and Q. J. Zhang, \"The Galerkin Element Method\r\nApplied to the Vibration of Damped Sandwich Beams,\" Computer and\r\nstructures, vol. 71, no. 3, pp. 239-256, 1999","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 39, 2010"}