Improved design and longitudinal pitch optimization of underdriven ROV
Aiming at the problems of large changes in longitudinal pitch amplitude and longitudinal pitch angle caused by the flow field when the remotely operated vehicle(ROV)sails at high speed,a method for achieving high speed underdriven ROV operated with zero longitudinal pitch or slight longitudinal pitch by matching and selecting structural parameters of the extended chassis and the tailplane was proposed.Based on the lattice Boltzmann method(LBM),a six-degree-of-freedom simulation experiment was carried out by using the wall adaptive refinement algorithm combined with the structural parameters of the ROV to simulate the ROV sailing motion.The numerical analysis for the ROV with different height of extended chassis and tailplane was analyzed numerically to obtain the relationship between the structural parameters of extended chassis and tailplane and the longitudinal pitch amplitude and longitudinal pitch angle.By comparing the rotating torque of ROVs with similar sailing performance,the relationship between ROV stability and tailplane height was determined under the same extended chassis conditions.The orthogonal experiments for structure optimization of the extended chassis and tailplane were conducted,and the longitudinal pitch data of the ROV under different experimental schemes were fitted by using genetic algorithm.Combined with the actual requirements,the height of the extended chassis and tailplane was determined,and the correctness of the ROV longitudinal pitch design scheme was verified by the actual test.The results showed that the reasonable match of the extended chassis and tailplane structure could effectively reduced the longitudinal pitch amplitude of underdriven ROVs,so as to achieve slight longitudinal pitch sailing motion of ROVs without amplitude compensation.The research results can provide reference for improving the longitudinal pitch motion of relevant underwater devices.
国家科技期刊平台
NSTL
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