Ewch i’r prif gynnwys
Yr Athro David Kennedy MA, PhD, CEng, MBCS, CITP, FRAeS

Yr Athro David Kennedy

MA, PhD, CEng, MBCS, CITP, FRAeS

Professor

Yr Ysgol Peirianneg

Email
kennedyd@cardiff.ac.uk
Telephone
+44 (0)29 2087 5340
Fax:
+44 (0)29 2087 4939
Campuses
S/0.20, Adeiladau'r Frenhines -Adeilad y De, 5 The Parade, Heol Casnewydd, Caerdydd, CF24 3AA
Siarad Cymraeg
Users
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Trosolwg

Qualifications Ph.D., University of Wales, Structural Engineering, 1994. B.A., Cambridge University, Mathematics / Engineering, 1978. Expertise and Research Interests My current research centres on the solution of nonlinear structural eigenvalue problems by exact (as opposed to finite element (FE)) methods. The characteristic approach is to assemble the static or dynamic stiffness matrix of the structure using exact member equations (eg for plane frames, space frames and plate assemblies) and to guarantee convergence on all required eigenvalues by using the Wittrick-Williams algorithm. Collaborative work with the National Aeronautics and Space Administration (NASA) and British Aerospace has led to the release of buckling and vibration programs for 3-dimensional lattice structures (BUNVIS-RG) and for prismatic plate assemblies (VICONOPT). VICONOPT includes a design capability, and is used in the aerospace industry in the UK, Europe and the USA. Particular emphasis has been placed on the efficient implementation of the numerical algorithms used to converge on the eigenvalues, including parallel processing techniques and optimisation strategies. Current research areas include postbuckling analysis, accurate mode-finding methods, discrete optimisation and delamination of carbon-fibre composites. In 2007 I undertook an industrial secondment at Airbus UK, funded by The Royal Society, developing software tools for the postbuckling analysis of composite aerospace structures. Other Expertise In my previous employment at Scicon Ltd, I was engaged in the development and support of the mathematical programming system SCICONIC/ VM. With support from the BP Venture Research Unit, I spent 2 years carrying out research into methods for nonlinear optimisation. Some of the resulting special problem structures and techniques to improve the branch and board search were incorporated in SCICONIC/VM. Future Research Accurate mode-finding techniques using the Wittrick-Williams Algorithm. Multi-level optimisation strategies for lightweight structural design. Postbuckling of aerospace structures. Delamination of carbon-fibre composites. Industrial Relevance Aerospace industry. Automotive industry. Keywords Aeronautical Engineering, Aerospace Engineering, Computer and Information Sciences, Structural Analysis, Structural Design. Additional Terms Branch and Bound, Buckling, Composite Materials, Computational Technique, Eigenvalue, Mathematical Programming, Nonlinear Optimisation, Parallel Computer, Postbuckling, Structural Analysis, Structural Design, Vibration. Languages (Reading, Writing, Speaking) English: (fluent, fluent, fluent) French: (basic, basic, basic) Memberships American Institute of Aeronautics and Astronautics (Senior Member) British Computer Society Chartered Engineer, Engineering Council Chartered IT Professional Royal Aeronautical Society Previous Positions 2005-2009, Reader, Cardiff University, Structural Engineering 2000-2005, Senior Lecturer, Cardiff University, Structural Engineering 1991-2000, Lecturer, Cardiff University, Structural Engineering 1987-1993, Senior Research Associate, Cardiff University, Structural Engineering 1983-1987, Research Associate, Cardiff University, Civil Engineering and Building Technology 1978-1983, Scicon Ltd, Analyst/Programmer 1981-1983, Scicon Ltd, BP Venture Research Fellow Major Funding Received Royal Society Industry Fellowship: Software tools for postbuckling of aerospace structures, £24635, Feb 1, 2007 to Sep 30, 2007. Engineering and Physical Sciences Research Council: Mode finding when using the Wittrick-Williams algorithm, via linear eigensolution analogy, £140229, Jan 11, 2001 to Jan 10, 2004. Engineering and Physical Sciences Research Council: Initial and advanced post-buckling of optimized stiffened panels, £71763, Nov 23, 1998 to Nov 22, 2000. Engineering and Physical Sciences Research Council: Algorithms for avoiding local optima in aerospace panel design, £101889, Apr 1, 1994 to Mar 31, 1997. Science and Engineering Research Council: ITE: New solution methods for exact structural eigenvalue problems using parallel computers, £81487, Jun 22, 1992 to Jun 21, 1995. Architectural, Civil & Environmental Engineering
Mechanics, Materials and Advanced Manufacturing

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Contracts

TitlePeopleSponsorValueDuration
Travel grantDr D KennedyThe National Assembly for Wales 300001/01/2002 - 01/01/2003
Computational mechanicsDr D KennedyRoyal Society 148605/09/2004 - 15/09/2004
Software tools for postbuckling of aerospace structuresKennedy DRoyal Society 2463501/02/2007 - 01/10/2007
Mode finding when using the Wittrick-Williams algorithm, via linear eigensolution analogyProf FW Williams, Dr D KennedyEngineering and Physical Sciences Research Council 14022911/01/2001 - 10/01/2004

Supervised Students

TitleStudentStatusDegree
Crack Detection In Frames Using Natural Frequency DegradationsLABIB Amr Osama MostafaThesis SubmittedPhD
Modelling of damage in composite stiffened panelsSULIMAN Basem SaoudCurrentPhD
Improved Exact Strip Postbuckling Analysis Of Anisotropic Plate With Combined Load And Edge Cases.CHE BinGraduatePhD
Postbuckling analysis of stiffened panels.ZHANG ChiCurrentPhD
THE MECHANICAL PROPERTIES OF NANO-SIZED MATERIALS AND STRUCTURESZHANG HongchaoGraduatePhD
DESIGN OPTIMISATION OF ADVANCED FIBRE COMPOSITES.KANG JiamingCurrentPhD
Buckling Behaviour of Delaminated Composite Plates Using Exact Stiffness AnalysisDAMGHANI MahdiGraduatePhD
Multilevel Optimisation of Aerospace and Lightweight StructuresFISCHER MarcGraduatePhD
Computational Modelling of Particlate Composites using Meshless MethodsISLAM Md SultanulGraduatePhD
POSTBUCKLING ANALYSIS OF COMPOSITE STIFFENED PANELS LOADED IN COMPRESSION AND SHEAR. SPECIALISATION - CIVIL/STRUCTURAL ENGINEERING.AL SAYMAREE Muthana Shaker MahdiCurrentPhD
DYNAMIC ANALYSIS OF SHELLSEL KAABAZI Nihal Husein FouadGraduatePhD
Multilevel Optimisation of Aerospace and Lightweight Structures Incorporating Postbuckling EffectsQU ShuangGraduatePhD
New Generic Algorithms for Constrained Optimisation snd Applications to Design of Composite LaminatesYU Tat Loong (Raymond)GraduatePhD
Multi-storey frames with rigid joint damage detection method based on the second order difference of influence linesLIU XiaoyangCurrentPhD
THE APPLICATION OF VICONOPT SOFTWARE FOR DAMAGE IDENTIFICATION IN PLATE STRUCTURE OF BRIDGE DECK SLAB.LUO YulinCurrentPhD