Author(s)

X.D. Liu, K. Hirayama & S. Sakai

Abstract

A third order solution of wave motion under the ice sheet was derived. The energy flux method was employed to calculate the wave height change at the ice sheet edge. According to the theory of elastic bending, the wave conditions for the ice sheet fracture were examined. Main discussion in this paper was focused on the effect of nonlinearity. 1 Introduction In order to analyse the motion of the ice sheet and the ice forces on struc- tures, it is necessary to understand the wave dynamics under the ice sheet. Wadhams[l] and Carter et al[2] reported theoretical studies on the inter- action between waves and the ice sheet, and Kanada et al[3] examined the validity of the theoretical results by comparing with experimental data. The previous studies were based on a linear wave theory and the

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