東華大學圖書館 |

Design, Hydrodynamic Analysis, and Optimal Performance of Myliobatiformes Inspired Aquatic Drones.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Design, Hydrodynamic Analysis, and Optimal Performance of Myliobatiformes Inspired Aquatic Drones./
Author:	Lloyd, Stephanie.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
Description:	150 p.
Notes:	Source: Masters Abstracts International, Volume: 82-03.
Contained By:	Masters Abstracts International82-03.
Subject:	Mechanical engineering. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28030309
ISBN:	9798664705003

Design, Hydrodynamic Analysis, and Optimal Performance of Myliobatiformes Inspired Aquatic Drones.
Lloyd, Stephanie.

Design, Hydrodynamic Analysis, and Optimal Performance of Myliobatiformes Inspired Aquatic Drones. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 150 p.

Source: Masters Abstracts International, Volume: 82-03.

Thesis (M.S.M.E.)--New Mexico State University, 2020.

This item must not be sold to any third party vendors.

This Thesis considers the design and analysis of underwater ray-inspired drones. There is an increasing demand for underwater vehicles for a range of mission types. These drones are not well optimized leading to reduced maneuverability and endurance. Biological systems have been a source of considerable inspiration as these systems perform better in their respective environments than non-biological systems. Using this biological inspiration, aquatic drones which take the shape of the manta ray and stingray are explored further in this Thesis. A mission plan for the marine drones is determined and operational parameters like fluid density, velocity, and size of the drones are defined. The manta ray and stingray shapes are each sized such that they have the same planform area. An additional four ray-inspired shapes are considered, two manta ray shapes with higher aspect ratios which pair again by planform area with two stingray shapes with higher aspect ratios. Five airfoils are selected. The six aspect ratios and five airfoils create a total of 30 different combinations. After that, electrical and structural weight estimations are generated. The volume and buoyancy of the systems are calculated. The volume and weight of these marine systems are determined with considering three different materials, namely, polylactic acid (PLA), carbon fiber, and fiberglass. The system should operate with neutral buoyancy. Therefore, a force balance is considered, and the lift needed for the system to be neutral buoyancy is calculated. Hydrodynamic analysis on the ray-inspired marine drones is performed. This begins by confirming mesh convergence such that the error of the used mesh is under 1%. Once there is a converged mesh, the analysis proceeds with four different analysis types. The results between these analysis types are compared and the error between them computed. The results from the most accurate hydrodynamic method is used in all following work. The hydrodynamic results show that the manta ray-inspired systems have generally higher coefficients of lift and drag. Immediate conclusions about performance can therefore not be drawn. The coefficients of lift and drag are used to calculate the lift and drag forces on the wing of the marine drones under investigation. These are used in conjunction with the previously calculated buoyancy and weight on each system. The force balance is reassessed with the lift values determined. The angle of attack where the lift generated yields a neutrally buoyant configuration for the system is determined. The drag values at these angles of attack are found and compared. The shape-airfoil configurations with the lowest drag are identified and compared across the planform area. An energy balance is carried out to compare how weight and drag affect system endurance. It is determined that the lowest drag airfoil is always the NACA 0008. The ideal material hydrodynamically for the manta ray is PLA and for the stingray is carbon fiber. The stingray performs better hydrodynamically for all three aspect ratio pairs. Structural analysis is then performed on the two lowest drag shapes, namely, the stingray and manta ray which have the smallest aspect ratios. SolidWorks finite element analysis software is used for modal analysis and stress concentration and displacement analyses when considering the three materials under consideration. The finite element modeling is first verified using a cantilever beam reduced-order model. The stingray and manta ray-inspired systems are then analyzed, and their mode shapes and modal frequencies are determined. An impulse analysis is completed, with a force applied to a small radius near each wingtip to determine stress concentrations and displacement of the systems. The results show it is better to use isotropic and stiff materials with the usefulness of a high damper to avoid any resonant responses. Additionally, the stingray-inspired system has a lower stress concentration and displacement than the manta ray counterpart. Actuation systems and propulsion methods of current ray-based systems are then explored. Because there are very few ray-based systems which use thruster-based propulsion systems, there is a critical discussion on three possible propeller locations for the system, namely, rear mounted, forward mounted, and mounted in a ducted body. It is determined that a ducted body configuration should be further explored due to the possibilities this configuration has in wake and noise reduction. Control surfaces and a vertical tail are sized and located. Electronics components are placed internally, and control surface actuation is also discussed.

ISBN: 9798664705003Subjects--Topical Terms:

649730
Mechanical engineering.
Subjects--Index Terms:

Bioinspiration

Design, Hydrodynamic Analysis, and Optimal Performance of Myliobatiformes Inspired Aquatic Drones.
LDR:05913nmm a2200385 4500 001 2280263
005 20210830065527.5
008 220723s2020 ||||||||||||||||| ||eng d
020 $a 9798664705003
035 $a (MiAaPQ)AAI28030309
035 $a AAI28030309
040 $a MiAaPQ $c MiAaPQ
100 1 $a Lloyd, Stephanie. $3 3558772
245 1 0 $a Design, Hydrodynamic Analysis, and Optimal Performance of Myliobatiformes Inspired Aquatic Drones.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2020
300 $a 150 p.
500 $a Source: Masters Abstracts International, Volume: 82-03.
500 $a Advisor: Abdelkefi, Abdessattar.
502 $a Thesis (M.S.M.E.)--New Mexico State University, 2020.
506 $a This item must not be sold to any third party vendors.
520 $a This Thesis considers the design and analysis of underwater ray-inspired drones. There is an increasing demand for underwater vehicles for a range of mission types. These drones are not well optimized leading to reduced maneuverability and endurance. Biological systems have been a source of considerable inspiration as these systems perform better in their respective environments than non-biological systems. Using this biological inspiration, aquatic drones which take the shape of the manta ray and stingray are explored further in this Thesis. A mission plan for the marine drones is determined and operational parameters like fluid density, velocity, and size of the drones are defined. The manta ray and stingray shapes are each sized such that they have the same planform area. An additional four ray-inspired shapes are considered, two manta ray shapes with higher aspect ratios which pair again by planform area with two stingray shapes with higher aspect ratios. Five airfoils are selected. The six aspect ratios and five airfoils create a total of 30 different combinations. After that, electrical and structural weight estimations are generated. The volume and buoyancy of the systems are calculated. The volume and weight of these marine systems are determined with considering three different materials, namely, polylactic acid (PLA), carbon fiber, and fiberglass. The system should operate with neutral buoyancy. Therefore, a force balance is considered, and the lift needed for the system to be neutral buoyancy is calculated. Hydrodynamic analysis on the ray-inspired marine drones is performed. This begins by confirming mesh convergence such that the error of the used mesh is under 1%. Once there is a converged mesh, the analysis proceeds with four different analysis types. The results between these analysis types are compared and the error between them computed. The results from the most accurate hydrodynamic method is used in all following work. The hydrodynamic results show that the manta ray-inspired systems have generally higher coefficients of lift and drag. Immediate conclusions about performance can therefore not be drawn. The coefficients of lift and drag are used to calculate the lift and drag forces on the wing of the marine drones under investigation. These are used in conjunction with the previously calculated buoyancy and weight on each system. The force balance is reassessed with the lift values determined. The angle of attack where the lift generated yields a neutrally buoyant configuration for the system is determined. The drag values at these angles of attack are found and compared. The shape-airfoil configurations with the lowest drag are identified and compared across the planform area. An energy balance is carried out to compare how weight and drag affect system endurance. It is determined that the lowest drag airfoil is always the NACA 0008. The ideal material hydrodynamically for the manta ray is PLA and for the stingray is carbon fiber. The stingray performs better hydrodynamically for all three aspect ratio pairs. Structural analysis is then performed on the two lowest drag shapes, namely, the stingray and manta ray which have the smallest aspect ratios. SolidWorks finite element analysis software is used for modal analysis and stress concentration and displacement analyses when considering the three materials under consideration. The finite element modeling is first verified using a cantilever beam reduced-order model. The stingray and manta ray-inspired systems are then analyzed, and their mode shapes and modal frequencies are determined. An impulse analysis is completed, with a force applied to a small radius near each wingtip to determine stress concentrations and displacement of the systems. The results show it is better to use isotropic and stiff materials with the usefulness of a high damper to avoid any resonant responses. Additionally, the stingray-inspired system has a lower stress concentration and displacement than the manta ray counterpart. Actuation systems and propulsion methods of current ray-based systems are then explored. Because there are very few ray-based systems which use thruster-based propulsion systems, there is a critical discussion on three possible propeller locations for the system, namely, rear mounted, forward mounted, and mounted in a ducted body. It is determined that a ducted body configuration should be further explored due to the possibilities this configuration has in wake and noise reduction. Control surfaces and a vertical tail are sized and located. Electronics components are placed internally, and control surface actuation is also discussed.
590 $a School code: 0143.
650 4 $a Mechanical engineering. $3 649730
650 4 $a Hydrologic sciences. $3 3168407
650 4 $a Naval engineering. $3 3173824
653 $a Bioinspiration
653 $a Hydrodynamic analysis
653 $a Optimal performance
653 $a Rays-inspired systems
653 $a Structural dynamics
653 $a Underwater drones
690 $a 0548
690 $a 0388
690 $a 0468
710 2 $a New Mexico State University. $b Mechanical and Aerospace Engineering. $3 3540154
773 0 $t Masters Abstracts International $g 82-03.
790 $a 0143
791 $a M.S.M.E.
792 $a 2020
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28030309