Hydrodynamics Analysis of an Underwater Foldable Arm

Improved designs for underwater manipulators are becoming increasingly important due to their utility in academic and industrial applications. In this work, an experiment was conducted conjunction with a numerical simulation investigate the hydrodynamic performance structural reliability of proposed foldable arm during unfolding process at various movement velocities. A large-scale geometric model single degree freedom (DOF) constructed. The distribution flow field, stability equivalent stress were quantitatively analyzed designed tank Computational Fluid Dynamics (CFD) simulation. Simulation results show that maximum deviation resistance torque is 8.04% 5.73%, respectively, compared experimental static postures. Comparison prove model. transient demonstrate optimal speed 3 Kn pressure on surface relatively regular. Furthermore, fluid–structure interaction (FSI) validation study presented. For coupling between fluid mechanics domains, nonmatching discretization approach adopted. directional deformation (Z axis) less than 0.50 mm. has large angle rotation high existing manipulators.