• Lee Boon Shing Faculty of Mechanical Engineering, University Teknologi Malaysia, 81310 UTM Johor Bahru, Johor
  • Zair Asrar Ahmad Faculty of Mechanical Engineering, University Teknologi Malaysia, 81310 UTM Johor Bahru, Johor


guided wave, Lamb wave, plate with trussed structures, dispersion curves.


The guided wave structural monitoring system relies heavily on the known guided wave behaviour in the waveguides. These behaviours are commonly obtained from the dispersion curves. For isotropic plates, analytical expression for the dispersion curves exist. The same dispersion curves can be obtained experimentally or by using finite element method (FEM) with fine meshes. Hence, the FEM simulation approach requires high computation cost. A preliminary study is made in this contribution to simplify the simulation of solid isotropic plate as simulation of plates having trussed structures. By doing so, the computational requirement in the FEM simulation would greatly be reduced. To gauge the effectiveness of the proposed approach, the dispersion curves of plate having trussed structures is obtained from the FEM simulation. The result is then used to find the connection between the solid plate and the plate having trussed structures and the possibilities of simplifying the FEM simulation. The comparison made with analytical result revealed that the best approximation comes from cross geometry truss structure. However, good correlation is observed only for anti-symmetric mode.


Su, Z. and Ye, L., Identification of Damage Using Lamb Waves, From Fundamentals to Applications, Springer-Verlag Berlin Heidelberg, 2009.

Sorohan, S., Constanin, N., Gavan, M., Anghel, V., Extraction Of Dispersion Curves For Wave Propagating In Free Complex Waveguides By Standard Finite Element Codes, University “Politehnica†of Bucharest, Ultrasonic (51), pg. 503-515, Elsevier, 2010.

Gravenkamp, H., Song, C., Prager, J., A Numerical Approach for the Computation of Dispersion Relations for Plate Structures Using the Scaled Boundary Finite Element Method, Jounal of Sound and Vibration (331), pg. 2543-2557, Elsevier, 2012.

Z.A.B. Ahmad, Numerical Simulations of Lamb Waves in Plates Using a Semi-Analytical Finite Element Method, VDI Verlag GmbH, 2011.

Alleyne, D.N., and Cawley, P., A 2-Dimensional Fourier Transform Method for the Quantitative Measurement of Lamb Modes, IEEE Ultrasonic Symposium, pg. 1143-1146, 1990.




How to Cite

Shing, L. B., & Ahmad, Z. A. (2018). GUIDED WAVE PROPAGATION IN PLATE HAVING TRUSSED STRUCTURES. Jurnal Mekanikal, 37(1). Retrieved from