The prediction and control of vortex-induced vibration (VIV) is one of the key problems for riser design. The effect of platform heave motion on VIV of deep sea top-tensioned riser (TTR) is presented by means of numerical simulation and experiment in this research. First. the heave motion was modeled as a parametric excitation. https://www.roneverhart.com/Christmas-Ornament-Ice-Ball-Molds-Design-Set-Options/