IDENTIFIKASI VORTEX-INDUCED VIBRATION PADA FREE STANDING HYBRID RISER
Identification of Vortex-Induced Vibrations of Free Standing Hybrid Riser
Kevin Kristian Gomeri Hutapea 1 dan Krisnaldi Idris 2
Program Studi Teknik Kelautan Fakultas Teknik Sipil dan Lingkungan,
Institut Teknologi Bandung
Jl Ganesha 10 Bandung 40132
email : 1 kevin.kristian.gomeri.hutapea@gmail.com 2 krisnaldi@ocean.itb.ac.id
Abstract: Deepwater riser selection is a complex evaluation of technical and commercial project drivers. The free standing hybrid riser (FSHR) has evolved in the last few years through major use in several continents and is now gaining serious consideration in other deepwater provinces. The large deformations of risers are caused by Vortex induced vibration (VIV) and the Elements of the structure rigid riser experienced significant vibrations due to the environment forces in the form of currents. When current passes through the structure, the current flow will form a vortex behind the rigid riser commonly called vortex. This vortex led to vibration periodically or continuously. This vibration induces a rigid riser so that oscillates according to the natural frequencies owned. When the value of this frequency approaches the frequency of the current around the structure, then the deviation of rigid riser greater vibration and lock-in event occurs. For avoiding such a situation, physicall axial loads are given to these kind of structures to cut down on probability of collapse and increase the service life.
Key words/ phrase : VIV, natural frequency, riser subjected to axial load
Loading...
Reload document 
Open in new tab