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.vacuumdoctores.shop/product-category/motor-parts-2/