What is Aladdin?
Aladdin is a computational toolkit for the interactive matrix
and finite element analysis of large engineering structures,
particularly building and highway bridge structures.
Aladdin views finite element computations as a
specialized form of matrix computations,
matrices as rectangular arrays of physical quantities,
and numbers as dimensionless physical quantities.
Aladdin Version 1.0 , released in May 1996, provides engineers with:

Mechanisms to define physical quantities with units, and matrices of physical quantities.

Facilities for physical quantity and matrix arithmetic.

A SI and US units package.
Conversion of units may be applied to physical quantity constants,
physical quantity variables, and matrices of physical quantities.

A matrix package. Its capabilities include matrix arithmetic,
solution of linear matrix equations,
and the general symmetric eigenvalue problem.

Programming constructs to control the solution procedure
(i.e., branching and looping) in matrix and finite element problems.

A finite element mesh generation package.
Two and threedimensional finite element meshes can be created.

A library of finite elements. Currently, the finite element library
includes elements for plane stress/plane strain analysis,
twodimensional beam/column analysis, threedimensional truss analysis,
DKQ plate analysis, and a variety of shell finite elements.
Aladdin Version 2.1 , released in March 2000, contains a variety of
new features for nonlinear analysis of structures with fiber finite elements.
Aladdin Version 3.0 is in the early stages of development.
We are currently working on finite elements and numerical algorithms
for the analysis of structures undergoing large geometric displacements,
and problems involving fluid flow and
fluidstructure interaction .
In a second project we are developing a suite of numerical algorithms
for the hybrid control of large structural systems.
Applications :
We are using Versions 2 and 3 of Aladdin for the
performancebased design and analysis of baseisolated
highway bridge structures and tethered aerostat systems.


Publications

Austin M.A., and Sebastianelli R.,
Phase Analysis of Actuator Response for SubOptimal BangBang and
Velocity Cancellation Control of Base Isolated Structures,
Journal of Structural Control and Health Monitoring ,
Vol. 14, Issue 7, July 2007, pp. 10341061.

Sebastianelli R. and Austin M.A.,
Energy Balance and Power Demand Assessment of Actuators
in Base Isolated Structures supplemented with Modified BangBang Control,
Structural Engineering and Mechanics ,
Vol. 25, No. 5, March 2007, pp. 541564.

Austin M.A.,
Matrix and Finite Element Stack Machines for
Structural Engineering Computations with Units,
Advances in Engineering Software,
Elsevier, Vol. 37, No. 8, August 2006, pp. 544559.

Austin M.A. and Lin W.J.,
EnergyBalance Assessment of Isolated Structures,
Journal of Engineering Mechanics,
ASCE, Vol. 130, No. 3, March 2004, pp. 347358.

Austin M.A., Lin W.J., and Chen X.G.,
Structural Matrix Computations with Units,
Journal of Computing in Civil Engineering ,
ASCE, Vol. 14, No. 3, July 2000, pp. 174182.

Austin M.A., Lin W.J., and Chen X.G.,
Structural Matrix Computations with Units:
Data Structures, Algorithms, and Scripting Language Design,
ISR Technical Report 9963
( ps.gz , 406 KB)
( pdf , 392 KB),
University of Maryland, College Park, MD 20742, November, 1999, 39 p.

Lin W.J. and Austin M.A.,
Design of a Scripting Language for the
EnergyBased Analysis of Nonlinear Structural Systems
( ps.gz ,273 KB),
I3th U.S. National Congress of Applied Mechanics,
University of Florida, Gainesville, June 2126, 1998.

Lin W.J.,
Modern Computational Environments for Seismic
Analysis of Highway Bridge Structures
( ps.Z , 805 KB),
Ph.D. Dissertation,
University of Maryland, College Park, MD 20742,
December 1997, (p. 197).
Note  WaneJang's dissertation
describes a lot of the new features in Aladdin 2.0.

Austin M.A., Chen X.G., and Lin W.J.,
Aladdin: A Computational Toolkit for Interactive
Engineering Matrix and Finite Element Analysis,
ISR Technical Research Report TR9574
( ps )
( pdf ),
University of Maryland, College Park, MD 20742,
August 1995, (p. 235).
Click here for the Table of Contents to TR9574.

Chen X.G. and Austin M.A.,
A Systems Approach to Nonlinear Finite Element Analysis of Shell Structures,
ISR Technical Research Report TR95104
( ps.Z , 346 KB),
University of Maryland, College Park, MD 20742,
December 1995, (p. 57).

Lanheng Jin,
Analysis and Evaluation of a Shell Finite Element with Drilling Degree of Freedom,
ISR Masters Thesis Report M.S. 9412
( ps.Z , 331 KB)
( pdf , 401 KB),
Institute for Systems Research,
University of Maryland, College Park, MD 20742,
December 1994, (p. 60).

