Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 76 for “"inflatable"”.
-
Design of inflatable solar concentrator
… minimal tracking requirements. The concept of an inflatable compound parabolic concentrator was developed, which required modifying the theoretical profile geometry. An analytical model was created to predict the efficiency of the system for different design parameter configurations. The model was …
-
Free vibrations of inflatable dams
This work deals with the linear two-dimensional free vibrations of an inflated cylindrical membrane. An air-inflated membrane is considered first. Vibration frequencies and modes are determined for various cases. The lowest mode shape is anti-symmetric. In the rest of the work, the membrane is …
-
Nonlinear vibration analysis of inflatable dams
In recent years the use of inflatable dams has become more widespread throughout the world. Various people have done studies on the shape and membrane tension of these structures; however, only a few authors have considered dynamic behavior. Due to the nature of the applications and the material …
-
An Inflatable Robotic Manipulator for Space Applications
L'abstract è presente nell'allegato / the abstract is in the attachment
-
Vibration Analysis of Single - Anchor Inflatable Dams
Inflatable dams are flexible, cylindrical structures anchored to a foundation. They are used for a variety of purposes, e.g. diverting water for irrigation or groundwater recharging, impounding water for recreational purposes, and raising the height of existing dams or spillways. The vibration …
-
Behavior of Pressure-Stabilized Inflatable Shells of Revolution
Made available in DSpace on 2014-12-08T23:56:35Z (GMT). No. of bitstreams: 1 6607766.pdf: 7743787 bytes, checksum: 1453f237d3284ab241e16bb01ec96b20 (MD5) Previous issue date: 1966
-
Experimental investigation on the dynamics of inflatable dams
The dynamic characteristics of pressurized cylindrical membranes used as dams are considered here. Single-anchored air-inflated membranes are predominantly studied. Load combinations are considered without any water, with impounding water, and with water overflow. The two major experimental …
-
Characterizing the mechanical properties of drop stitch inflatable structures
… the mechanical properties of drop stitch inflatable structures with specific reference to inflatable stand up paddleboards. A sample of drop stitch material was fabricated and simple beam bending tests were performed at different pressures. This data was then used to invalidate a developed …
-
Morphing Hypersonic Inflatable Aerodynamic Decelerator (HIAD) Mechanisms and Controls
… of existing launch vehicles. A Hypersonic Inflatable Aerodynamic Decelerator (HIAD) is an emerging technology that provides an increased drag area by inflating the aeroshell to diameters not possible with rigid aeroshells, allowing the vehicle to decelerate higher in the atmosphere, …
-
Prototyping and Testing an Inflatable Robot for On-Orbit Servicing
L'abstract è presente nell'allegato / the abstract is in the attachment
-
Dynamic Analysis of an Inflatable Dam Subjected to a Flood
A dynamic simulation of the response of an inflatable dam subjected to a flood was carried out to determine the survivability envelope of the dam where it can operate without rupture, or overflow. A fully nonlinear free-surface flow was applied in two dimensions using a mixed Eulerian-Lagrangian …
-
Design Optimization of a High Aspect Ratio Rigid/Inflatable Wing
… optimization method for combining rigid and inflatable wing design. The design will take advantage of the benefits of inflatable wing configurations for minimizing weight, while saving on design pressure requirements and allowing portability by using a rigid section at the root in which the …
-
Analysis of the vibrations of inflatable dams under overflow conditions
… analysis is applied to the vibrations of inflatable dams under overflow conditions. The static analysis yields the equilibrium state for both the free surface profile and the shape of the dam. The dynamic analysis investigates the small vibrations of the inflatable dam about the …
-
Hypervelocity Impact Analysis of Hybrid Nanocomposite Sensors for Inflatable Space Structures
… human habitation can be made safe and easy with inflatable space habitats (Litteken, 2017). One of the biggest threats faced by these structures in outer space is impact damage by micrometeoroid orbital debris (MMOD) traveling at velocities as high as 15 km/s (Lemmens, Krag, Rosebrock, & …
-
Experimental and Numerical Investigations of the Aerodynamics of Flexible Inflatable Wings
… at leveraging some of the benefits offered by inflatable wings for use in tethered kite-like systems towards the goal of designing a High Altitude Aerial Platform (HAAP). Uses of such a system include Airborne Wind Energy Systems (AWES), among others. The key bene- fit offered by such wings is …
-
The design and performance of a low-cost inflatable wheelchair seat cushion
… expensive air cushions. The design of a low-cost inflatable wheelchair seat cushion made of bicycle inner tubes, the Loop cushion, was evaluated through conducting user research interviews and performance tests as outlined in the ISO standards regarding wheelchair seat cushions. Ten tests were …
-
Localized Effects of Piezopolymer Devices on the Dynamics of Inflatable Space-Based Structures
Inflatable space-based devices have become popular over the past three decades, as they offer minimized launch-mass and launch-volume. Since some satellites have mirror sections over fifty feet in diameter and struts with lengths over ninety feet, inflation while in orbit has become a necessary …
-
Design And Testing Validation Of An Extendable Pressurized Tunnel For An Inflatable Lunar Habitat
<p>In the design of the UND inflatable lunar habitat (ILH), the need for an extendable pressurized tunnel to link the habitat to a wheeled terrestrial vehicle (rover), and secure the connection between both elements is one of the critical problems to be solved in order to test the validity of the …
Page 1 of 4