Coupled multibody-fluid dynamic analysis for wave glide

Chang, Zongyu; Feng, Zhanxia; Sun, Xiaoyun; Deng, Chao; Zheng, Zhongqiang

doi:10.1007/978-3-030-20131-9_324

Cited by 4 publications

(5 citation statements)

References 16 publications

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“…The hydrodynamic analysis is implemented in time domain attached to the local frame with forward motion. The motion characteristics and the propulsion performance are obtained, and the calculation burden and time can be more economic than the former method 32 .…”

Section: Discussionmentioning

confidence: 99%

“…In previous study of coupling analysis between fluid and propulsion mechanism, 32 the hydrodynamic analysis of mechanism is carried out in the whole fluid domain as shown in Figure 4(a). With the increase of simulation time, the analysis domain will be larger and larger, which will consume a lot of computational time and cost.…”

Section: Problem Description and Methodologymentioning

confidence: 99%

“…Yang et al 31 optimized the propulsion performance of six tandem hydrofoils of Wave Glider by changing the pivot position and the torsional spring stiffness. Chang et al 32 studied the fluid and multi-body coupling dynamics of the Wave Glider and fulfilled fluid-structure coupling numerical analysis by using the dynamic mesh technology. Qi et al 33 studied the effects of non-sinusoidal pitch motion, reduced frequency, spring stiffness, mass ratio, damping coefficient, etc.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of propulsion performance of wave-propelled mechanism based on fluid-rigid body coupled model

Chang

Feng

Deng

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part M:

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Wave-propelled mechanisms are applied to propel unmanned marine vehicles such as Wave Glider and wave-powered boats, which can convert wave energy directly into propulsion. In this paper, a fluid-rigid body coupled dynamic model is utilized to investigate the propulsion performance of the wave-propelled mechanism. Firstly, the coupled dynamic model of the wave-propelled mechanism is developed based on relative motion principle by combining rigid body dynamics model and CFD method. Then, the motion responses of wave-propelled mechanism are calculated. The relationship between the propulsion force, heave and pitch motion of hydrofoil are analyzed by using phase diagrams and the actual operation conditions of propulsion mechanism are obtained. Besides, the effects of restoring spring stiffness and wave heights on the propulsion performance are also investigated, and the vortex evolution is illustrated at different moments of movement and different restoring stiffness. These works can be helpful for the design and optimization of different kinds of wave-propelled vehicles.

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Section: Discussionmentioning

confidence: 99%

Section: Problem Description and Methodologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of propulsion performance of wave-propelled mechanism based on fluid-rigid body coupled model

Chang

Feng

Deng

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part M:

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“…The hydrodynamic characteristics of the cable connected multibody marine robot are usually analyzed by the maternal estimation method, the parameter identification method, and the CFD method. The CFD method is used to analyze the hydrodynamic characteristics of a wave glider by Yu et al [106] and Chang et al [107]. Some simplifications have been made in this method, such as considering the waves as regular and with small amplitude or only considering the resistance and lift components but neglecting the inertial component.…”

Section: ) Hydrodynamic Characteristicsmentioning

confidence: 99%

Development of Multibody Marine Robots: A Review

Kang

Zhang

et al. 2020

IEEE Access

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Multibody marine robots, representing a promising research and development area, have gained acute attention and response from civil and military fields. A multibody marine robot is a multibody system composed of multiple single-body marine robots (defined as a unit) in a certain topology. Such a system is generally characterized by underactuation, hyperredundancy, power distribution, modularization and so on. Compared with traditional single-body marine robots, multibody marine robots can carry greater loads and have more forms of motion, so they can meet more specialized functional requirements. At the same time, they also have more complex hydrodynamic characteristics due to their unique structures and motion forms. In this paper, the types, features, and hydrodynamic characteristics of typical multibody marine robots are reviewed and summarized based on the connection structures between units. In addition, the development trends of multibody marine robots are analyzed and discussed. This review work anticipates positive attention from future readers regarding multibody marine robots, which represent an important subarea of marine robots.

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“…Qi et al [18] studied the propulsive performance of the semi-active flapping foil of the wave glider, and the pitching motion is completely determined by the hydrodynamic force and torsion spring. Chang et al [19] built the analysis scheme of fluid-mechanism coupling analysis, and studied the fluid and multibody coupling dynamics of the wave glider, which is consisted of submersible frame body, fins and correspondent restoring springs. Yang et al [20] optimized the propulsion performance of wave glider by changing the pivot position and the torsional spring stiffness of the hydrofoil based on STAR-CCM +, and obtained the optimum propulsive performance of six tandem hydrofoils with torsional spring.…”

Section: Introductionmentioning

confidence: 99%

Effects of nonlinearity of restoring springs on propulsion performance of wave glider

et al. 2022

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Wave glider is an unmanned surface vehicle which can directly convert wave energy into forward propulsion and fulfill long-term marine monitoring. Previous study suggested that the wave motion and stiffness of restoring springs mounted on the hydrofoil are main factors affecting the propulsion performance of wave glider. In this paper, the dynamic responses and nonlinear characteristics of underwater propulsion mechanism considering the nonlinear stiffness of restoring springs are investigated based on a fluid-rigid body coupled model. Firstly, the models of propulsion mechanism with different kind of restoring spring are proposed, and the linear and nonlinear characteristics of restoring spring are considered. Then, a fluid-rigid body coupled model of wave glider is developed by coupling the rigid body dynamics model and hydrodynamic model. Dynamic responses are simulated by numerical analysis method and the nonlinear characteristics with different restoring springs are illustrated by time/frequency domain motion response and phase diagram analysis. The effects of wave excitation frequency and wave heights on the propulsion performance of wave glider are analyzed. The results show that, multi-frequency responses occurred in propulsion system. And the study suggests that the nonlinear restoring spring on the hydrofoil can be suitable for different sea condition and better propulsion performance can obtained than linear stiffness spring, which provides a reference for developing propulsion mechanism with high performance in complex marine environment.

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Coupled multibody-fluid dynamic analysis for wave glide

Cited by 4 publications

References 16 publications

Analysis of propulsion performance of wave-propelled mechanism based on fluid-rigid body coupled model

Analysis of propulsion performance of wave-propelled mechanism based on fluid-rigid body coupled model

Development of Multibody Marine Robots: A Review

Effects of nonlinearity of restoring springs on propulsion performance of wave glider

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