NUMERICAL CALCULATION OF SURFACE WAVES USING NEW NODAL EQUATIONS

Abstract Various numerical models using nodal equations have been proposed to simulate the behavior of ultrasonic waves in materials precisely. These simulation methods are effective for the investigation of the property of elastic waves inside solid, but they give discrepancy on the calculation of boundary phenomena of ultrasonics, i.e. surface wave behavior. In the present report, a new nodal formulation is proposed, by which the behavior of surface waves can be correctly simulated. The equations are for the 2-dimensional simulation, but the formulation procedure is applicable to 3-dimensional problems. Results calculated by the equations are demonstrated by predicting properties of elliptical motions in surface waves, showing that the simulated results are in good agreement with those by theoretical predictions. KEY WORDS: Computer simulationnodal equationelastic wavessurface waves