STRESS AND DYNAMIC ANALYSIS OF SIMPLE REMOTELY OPERATED UNDERWATER VEHICLE | ||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||
| Article 22, Volume 15, 15th International Conference on Applied Mechanics and Mechanical Engineering., May 2012, Pages 1-22 PDF (2.66 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/amme.2012.36919 | ||
| Authors | ||
| A. M. Badawy; A. A. Omer | ||
| Egyptian Armed Forces. | ||
| Abstract | ||
| ABSTRACT Stress and dynamic analyses of submerged structures, especially Remotely Operated Underwater Vehicles (ROV) are the first step to build and design an underwater vehicle. In the present paper the high pressure produced form the water column weight plus the dynamic pressure produced from the vehicle speed is calculated. The stress affects the structure due to both static and dynamic loads is obtained. The fulfillment of these analyses needed the use of finite element model simulating the structure. Stress analysis is made by the finite element package ABAQUS® version 6.8. The dynamic analysis introduces the equation of motion representing the dynamic behavior of the vehicle under the effect of the hydrodynamic load against the vehicle motion. Equations define the added mass coefficients are used mathematically to estimate the added mass coefficients. The added mass coefficients are estimated practically by means of a free decay pendulum motion test. The hydrodynamic coefficients (linear and quadric damping coefficients,) are determined using the computational fluid dynamic through software ANSIS CFX. These coefficients are compared by the coefficients estimated practically by means of a free decay pendulum motion test. Good agreement between practical and CFD hydrodynamic coefficient is achieved. The variation of ROV acceleration and velocity with time is obtained for surge and heave directions with varying thrusting load. | ||
| Keywords | ||
| Finite element method; Computational Fluid Dynamic; Hydrodynamic coefficient; added mass; surge; heave | ||
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