Author: William L. Ko
Publisher:
ISBN:
Category : Aerodynamics, Hypersonic
Languages : en
Pages : 30
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Book Description
To visually record the intial free flight event of the Hyper-X research flight vehicle immediately after separation from the Pegasus® booster rocket, a video camera was mounted on the bulkhead of the adapter through which Hyper-X rides on Pegasus. The video camera was shielded by a protecting camera window made of heat-resistant quartz material. Whem Hyper-X separates from Pegasus, this camera window will be suddenly exposed to Mach 7 stagnation thermal shock and dynamic pressure loading (aerothermal loading). To examine the structural integrity, thermoelastic analysis was performed, and the stress distributions in the camera windows were calculated. The critical stress point where the tensile stress reaches a maximum value for each camera window was identified, and the maximum tensile stress level at that critical point was found to be considerably lower than the tensile failure stress of the camera window material.
Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781723769450
Category : Science
Languages : en
Pages : 30
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Book Description
To visually record the initial free flight event of the Hyper-X research flight vehicle immediately after separation from the Pegasus(registered) booster rocket, a video camera was mounted on the bulkhead of the adapter through which Hyper-X rides on Pegasus. The video camera was shielded by a protecting camera window made of heat-resistant quartz material. When Hyper-X separates from Pegasus, this camera window will be suddenly exposed to Mach 7 stagnation thermal shock and dynamic pressure loading (aerothermal loading). To examine the structural integrity, thermoelastic analysis was performed, and the stress distributions in the camera windows were calculated. The critical stress point where the tensile stress reaches a maximum value for each camera window was identified, and the maximum tensile stress level at that critical point was found to be considerably lower than the tensile failure stress of the camera window material.Ko, William L. and Gong, LeslieArmstrong Flight Research CenterTHERMOELASTICITY; CAMERAS; WINDOWS (APERTURES); STRUCTURAL FAILURE; THERMAL SHOCK; DYNAMIC PRESSURE; CRITICAL LOADING; HYPERSONIC SPEED; STRESS DISTRIBUTION; TENSILE STRESS; PEGASUS AIR-LAUNCHED BOOSTER; STAGNATION TEMPERATURE; CRITICAL POINT; X-43 VEHICLE; FINITE ELEMENT METHOD; SUPERSONIC COMBUSTION RAMJET ENGINES
Author: John Orin Powers
Publisher:
ISBN:
Category : Sonic boom
Languages : en
Pages : 44
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1102
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Author:
Publisher:
ISBN:
Category : Large space structures (Astronautics)
Languages : en
Pages : 380
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Author:
Publisher:
ISBN:
Category : Flame spread
Languages : en
Pages : 4
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Author: Hamid Taghavifar
Publisher: Springer
ISBN: 331942520X
Category : Technology & Engineering
Languages : en
Pages : 183
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Book Description
This book deals with the analysis of off-road vehicle dynamics from kinetics and kinematics perspectives and the performance of vehicle traversing over rough and irregular terrain. The authors consider the wheel performance, soil-tire interactions and their interface, tractive performance of the vehicle, ride comfort, stability over maneuvering, transient and steady state conditions of the vehicle traversing, modeling the aforementioned aspects and optimization from energetic and vehicle mobility perspectives. This book brings novel figures for the transient dynamics and original wheel terrain dynamics at on-the-go condition.
Author: Olivier Sename
Publisher: Springer
ISBN: 3642361102
Category : Technology & Engineering
Languages : en
Pages : 402
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Book Description
Vehicles are complex systems (non-linear, multi-variable) where the abundance of embedded controllers should ensure better security. This book aims at emphasizing the interest and potential of Linear Parameter Varying methods within the framework of vehicle dynamics, e.g. proposed control-oriented model, complex enough to handle some system non linearities but still simple for control or observer design, take into account the adaptability of the vehicle's response to driving situations, to the driver request and/or to the road sollicitations, manage interactions between various actuators to optimize the dynamic behavior of vehicles. This book results from the 32th International Summer School in Automatic that held in Grenoble, France, in September 2011, where recent methods (based on robust control and LPV technics), then applied to the control of vehicle dynamics, have been presented. After some theoretical background and a view on some recent works on LPV approaches (for modelling, analysis, control, observation and diagnosis), the main emphasis is put on road vehicles but some illustrations are concerned with railway, aerospace and underwater vehicles. The main objective of the book is to demonstrate the value of this approach for controlling the dynamic behavior of vehicles. It presents, in a rm way, background and new results on LPV methods and their application to vehicle dynamics.
Author: Olaf Kolditz
Publisher: Springer Science & Business Media
ISBN: 3642271774
Category : Computers
Languages : en
Pages : 390
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Book Description
The book comprises an assembly of benchmarks and examples for porous media mechanics collected over the last twenty years. Analysis of thermo-hydro-mechanical-chemical (THMC) processes is essential to many applications in environmental engineering, such as geological waste deposition, geothermal energy utilisation, carbon capture and storage, water resources management, hydrology, even climate chance. In order to assess the feasibility as well as the safety of geotechnical applications, process-based modelling is the only tool to put numbers, i.e. to quantify future scenarios. This charges a huge responsibility concerning the reliability of computational tools. Benchmarking is an appropriate methodology to verify the quality of modelling tools based on best practices. Moreover, benchmarking and code comparison foster community efforts. The benchmark book is part of the OpenGeoSys initiative - an open source project to share knowledge and experience in environmental analysis and scientific computation.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 472
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