TRANSIENT SIMULATION OF IMPULSE WIND EFFECT ON A TALL SHIPYARD FRAME STRUCTURE

Goran Nikola Radoicic; Miomir Ljubomir Jovanovic

doi:10.5937/jaes15-12935

Goran Nikola Radoicic Public utility company "Mediana"-Nis
Miomir Ljubomir Jovanovic Faculty of Mechanical Engineering, University of Nis

DOI: https://doi.org/10.5937/jaes15-12935

Keywords: Dynamic response, Engineering design, Modelling, Simulation, Wind load,

Abstract

This paper presents the importance of a dynamically checked design of the shipbuilding portal rotating crane geometry regarding wind load. The gust of wind is modelled as a wave quantity variable in time and altitude of flow. The research is performed by non-linear transient FEM analysis. Structural damping is modelled by conversion to the equivalent viscous damping. Eigenfrequencies are obtained by applying the Lanczos method. The paper contains an originally developed dynamic model and experimentally verified stiffness of the structure. Through several case studies, the paper indicates a greater danger of a multi-wave wind gust at the steady state of wind speeds statistically recorded in relation to a single-wave wind gust at the extremely recorded speed. Based on the conducted dynamic simulations of wind action a new design criterion is suggested – the conditional quotient of structural geometry.

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