Commenced in January 2007
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Damping Mechanism in Welded Structures

Authors: B.Singh, B.K.Nanda

Abstract:

Response surface methodology with Box–Benhken (BB) design of experiment approach has been utilized to study the mechanism of interface slip damping in layered and jointed tack welded beams with varying surface roughness. The design utilizes the initial amplitude of excitation, tack length and surface roughness at the interfaces to develop the model for the logarithmic damping decrement of the layered and jointed welded structures. Statistically designed experiments have been performed to estimate the coefficients in the mathematical model, predict the response, and check the adequacy of the model. Comparison of predicted and experimental response values outside the design conditions have shown good correspondence, implying that empirical model derived from response surface approach can be effectively used to describe the mechanism of interface slip damping in layered and jointed tack welded structures.

Keywords: Interface slip damping, welded joint, surface roughness, amplitude, tack length, response surface methodology.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1071808

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References:


[1] L.E.Goodman and J.H. Klumpp, "Analysis of slip damping with reference to turbine blade vibration," Journal of Applied Mechanics, vol. 23, pp. 421, 1956.
[2] M. Masuko, I. Yoshimi, and Y. Keizo, "Theoretical analysis for a damping ration of a jointed cantibeam," Bull. JSME, vol. 16, no.99, pp. 1421-1433, 1973.
[3] N. Motosh, "Stress distribution in Joints of bolted or riveted connections," Journal of Engineering for Industry, ASME, vol. 97, Ser B (1), pp. 157-161, 1975.
[4] N. Nishiwaki, M. Masuko, Y. Ito, and I. Okumura, "A study on damping capacity of a jointed cantilever beam (1st report; experimental results)," Bulletin of JSME, vol. 21, no. 153, pp. 524-531, 1978.
[5] B.K. Nanda, and A.K. Behera, "Study on damping in layered and jointed structures with uniform pressure distribution at the interfaces," Journal of Sound and Vibration, vol. 226, no.4, pp. 607-624, 1999.
[6] E.J. Berger, "Friction modeling for dynamic system simulation," Applied Mechanics Reviews, vol. 55, no. 6, pp. 535-577, 2002.
[7] G. Csaba, "Forced response analysis in time and frequency domains of a tuned bladed disk with friction dampers," Journal of Sound and Vibration. vol. 214, pp. 395-412, 1998.
[8] C.-H. Menq, J. Bielak, and J.H. Griffin, "The influence of microslip on vibratory responseÔÇöpart I: a new microslip model," Journal of Sound and Vibration, vol. 107, pp. 279-293, 1986.
[9] E. J. Berger, M. R. Begley, and M. Mahajani, "Structural dynamic effects on interface response - formulation and simulation under partial slipping conditions," ASME, Journal of Applied Mechanics, vol. 67, pp.785-792, 2000.
[10] Y. Anno, et al, Transactions of Japan Society of Mechanical Engineers (in Japanese), vol. 36, no. 284, pp. 663, 1970.
[11] B. Singh and B.K. Nanda, "Effect of Welding on the Slip Damping of Layered and Jointed Structures," Journal of Engineering Mechanics, ASCE, vol. 136, no. 7, 928-932, 2010.