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RaWid was the German national technology programme on transonic aerodynamics and supporting technologies, lasting from 1995 to 1998. One of the main topics was laminar wing development. Besides aerodynamic design work, many operational aspects were investigated. A manufacturing concept was developed to be applied to operational laminar wings and empennages. It was built in a large scale manufacturing demonstrator with the aerodynamic shape of a 1,5 m section of the A320 fin nose. Tolerances in shape and roughness fulfilled all requirements. The construction can easily be adapted to varying stiffness and strength requirements. Weight and manufacturing costs are comparable to common nose designs. The mock-up to be designed in ALTTA is based on this manufacturing principle. Another critical point is contamination of suction surfaces. Several tests were performed to investigate perforated titanium suction surfaces at realistic operational conditions: - a one year flight test with a suction plate in the stagnation area of the Airbus "Beluga" - a one year test of several suction plates in a ground test near the airport - a one year test of a working suction ground test installation at all weather conditions. No critical results were found. There is no long term suction degradation visible. Icing conditions and ground de-icing fluids used on airports did not pose severe problems. Some problems detected require only respection of weak design constraints.
Password necessarily. Access only for Students by Prof. Dr. Klaus-Peter Kämper. Winter semester 2008/2009. 488 pages (pdf) Contents 1. Introduction 2. Introduction to Sensors 3. Introduction to Microfabrication 4. Pressure Sensors 5. Acceleration Sensors 6. Angular Rate Sensors 7. Position Sensors 8. Flow Sensors 9. Piezoelectric Actuators 10. Magnetostrictive Actuators 11. Actuators based on Shape Memory Alloys 12. Actuators based on Electrorheological Fluids 13. Actuators based on Magnetorheological Fluids 14. Index
7th International Conference on Reliability of Materials and Structures (RELMAS 2008). June 17 - 20, 2008 ; Saint Petersburg, Russia. pp 354-358. Reprint with corrections in red Introduction Analysis of advanced structures working under extreme heavy loading such as nuclear power plants and piping system should take into account the randomness of loading, geometrical and material parameters. The existing reliability are restricted mostly to the elastic working regime, e.g. allowable local stresses. Development of the limit and shakedown reliability-based analysis and design methods, exploiting potential of the shakedown working regime, is highly needed. In this paper the application of a new algorithm of probabilistic limit and shakedown analysis for shell structures is presented, in which the loading and strength of the material as well as the thickness of the shell are considered as random variables. The reliability analysis problems may be efficiently solved by using a system combining the available FE codes, a deterministic limit and shakedown analysis, and the First and Second Order Reliability Methods (FORM/SORM). Non-linear sensitivity analyses are obtained directly from the solution of the deterministic problem without extra computational costs.
Jahresbericht 2007
(2008)
Jahresbericht 2007 der Fachhochschule Aachen. Aachen: Fachhochschule 2008. 149 S.: Ill., graph. Darst. Inhaltsverzeichnis: 5 Vorwort des Rektors 9 Chronik 2007 17 Struktur der Hochschule 18 Struktur und Profil der Hochschule 19 Rektorat 21 Entwicklungen der Hochschule 22 Aktuelle Entwicklungen der Hochschule 25 Studium und Lehre 30 Forschung und Entwicklung 34 Finanzen der Hochschule 39 Personal 45 Fachbereiche 46 Fachbereich Architektur 49 Fachbereich Bauingenieurwesen 53 Fachbereich Angewandte Naturwissenschaften und Technik 58 Fachbereich Design 63 Fachbereich Elektrotechnik und Informationstechnik 69 Fachbereich Luft- und Raumfahrttechnik 73 Fachbereich Wirtschaftswissenschaften 77 Fachbereich Maschinenbau und Mechatronik 83 Institute und Kompetenzplattformen 84 Institut für Angewandte Polymerchemie (IAP) 86 Institut für Industrieaerodynamik (I.F.I.) 88 Institut für Nano- und Biotechnologien (INB) 92 Institut NOWUM-Energy 94 Solar-Institut Jülich (SIJ) 98 Freshman Institute 100 Sprachenzentrum (SZ) 104 KOPF Bioengineering 108 KOPF Energie und Umwelt 109 KOPF Polymere Materialien 112 KOPF Synergetic Automotive/Aerospace Engineering (SAAE) 117 Einrichtungen der Hochschule 118 Akademisches Auslandsamt 120 alfha.net 122 Career Service 124 Datenverarbeitungszentrale (DVZ) 126 Gleichstellungsbeauftragte 129 Hochschulbibliothek 132 Studierendensekretariat 133 Technologie- und Wissenstransfer 135 Zentrale Qualitätsentwicklung 141 Stabsstellen 142 Allgemeine Studienberatung 144 Stabsstelle für Event Management 146 Stabsstelle für Presse-, Öffentlichkeitsarbeit und Marketing 149 Impressum und Bildnachweis