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http://dx.doi.org/10.12989/sem.2005.20.4.451

Transient energy flow in ship plate and shell structures under low velocity impact  

Liu, Z.S. (Computational Solid Mechanics, Institute of High Performance Computing)
Swaddiwudhipong, S. (Department of Civil Engineering, National University of Singapore)
Lu, C. (Computational Solid Mechanics, Institute of High Performance Computing)
Hua, J. (Department of Civil Engineering, National University of Singapore)
Publication Information
Structural Engineering and Mechanics / v.20, no.4, 2005 , pp. 451-463 More about this Journal
Abstract
Structural members commonly employed in marine and off-shore structures are usually fabricated from plates and shells. Collision of this class of structures is usually modeled as plate and shell structures subjected to dynamic impact loading. The understanding of the dynamic response and energy transmission of the structures subjected to low velocity impact is useful for the efficient design of this type of structures. The transmissions of transient energy flow and dynamic transient response of these structures under low velocity impact are presented in the paper. The structural intensity approach is adopted to study the elastic transient dynamic characteristics of the plate structures under low velocity impact. The nine-node degenerated shell elements are adopted to model both the target and impactor in the dynamic impact response analysis. The structural intensity streamline representation is introduced to interpret energy flow paths for transient dynamic response of the structures. Numerical results, including contact force and transient energy flow vectors as well as structural intensity stream lines, demonstrate the efficiency of the present approach and attenuating impact effects on this type of structures.
Keywords
dynamic response; finite element method; low velocity impact; plate and shell structures; structural intensity;
Citations & Related Records

Times Cited By Web Of Science : 1  (Related Records In Web of Science)
Times Cited By SCOPUS : 1
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1 Pedersen, P.T. and Zhang, S. (2000), 'Absorbed energy in collision and grounding revising Minorski's Empirical method', J Ship Res., 44(2), 140-154
2 Romano, A.J., Abraham, P.B. and Williams, E.G (1990), 'Poynting vector formulation for thin shell and plate and its application to structural intensity and source localization, Part I: Theory', J. Acoust. Soc. Am., 1166-1175
3 Swaddiwudhipong, S., Koh, C.G and Liu, Z.S. (2002), 'Numerical study of shell structures under low velocity impact', J. Int. Assoc.for Shell and Spatial Struct., 43(140), 159-170
4 Wang, G, Ohtsubo, H. and Liu, D. (1997), 'A simple method for predicting the grounding strength of ships', J. Ship Res., 41, 241-247
5 Williams, E.G (1991), 'Structural intensity in thin cylindrical shells', J. Acoust. Soc. Am., 89, 1615-1622   DOI
6 Zhang, Y. and Adin, M. III J. (1996), 'Measuring the structural intensity and force distribution in plate', J. Acoust. Soc. Am., 99(1), 345-353   DOI
7 Wang, G, Arita, K. and Liu, D. (2000), 'Behaviour of a double hull in a variety of stranding or collision scenario', Marine Structure, 13, 147-187   DOI   ScienceOn
8 Bouthier, O.M. and Bernhard, R.J. (1995), 'Simple models of the energetics of transversely vibrating plates', J. Sound Vib., 182(1), 149-164   DOI   ScienceOn
9 Gavric, L. and Pavic, G (1993), 'A finite element method for computation of structural intensity by the normal mode approach', J. Sound Vib., 164(1), 29-43   DOI   ScienceOn
10 Lee, H.P., Lu, C., Liu, Z.S. and Xu, X.D. (2003), 'The structural intensity analysis of plates under dynamic loading', Proc. 16th Nordic Seminar on Computational Mechanics, Editors K.M. Mathisen, T. Kvamsdal and K.M. Okstad, Trondheim, Norway, 145-148
11 Liu, Z.S. and Swaddiwudhipong, S. (1997), 'Response of plate and shell structures due to low velocity impact', J of Eng. Mech., ASCE, 123(12), 1230-1237   DOI   ScienceOn
12 Noiseux, D.U. (1970), 'Measurement of power flow in uniform beams and plates', J. Acoust. Soc. Am., 47, 238-247   DOI
13 Pavic, G. (1976), 'Measurement of structure borne wave intensity, Part I: Formulation of the methods', J. Sound Vib., 49(2), 221-230   DOI   ScienceOn
14 Pavic, G. (1992), 'Vibroacoustical energy flow through straightpipes', J. Sound Vib., 154(3),411-429   DOI   ScienceOn
15 Pedersen, P.T. and Zhang, S. (1998), 'On impact mechanics in ship collisions', Marine Structures, 11,429-449   DOI   ScienceOn