LESM—An object‐oriented MATLAB program for structural analysis of linear element models

2019 ◽  
Vol 27 (3) ◽  
pp. 553-571 ◽  
Author(s):  
Rafael Lopez Rangel ◽  
Luiz Fernando Martha
Keyword(s):  
Structural Analysis ◽  
Object Oriented ◽  
Linear Element ◽  
Matlab Program

A Knowledge-Based Structural Analysis Based on an Object-Oriented Approach

1992 ◽  
Vol 7 (1) ◽  
pp. 15-28 ◽  
Author(s):  
Shoichi Nakai ◽  
Hiroshi Katukura ◽  
Manabu Ebihara ◽  
Katsuyuki Niimi ◽  
Keiichi Hirose ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Object Oriented ◽  
Knowledge Based ◽  
Object Oriented Approach ◽  
Oriented Approach

OpenFOAM Turbo Tools: From General Purpose CFD to Turbomachinery Simulations

2011 ◽  
Author(s):  
Hrvoje Jasak ◽  
Martin Beaudoin
Keyword(s):  
Mass Transfer ◽  
Fluid Flow ◽  
Structural Analysis ◽  
Object Oriented ◽  
General Purpose ◽  
Physical Models ◽  
Code Design ◽  
Multi Stage ◽  
Numerical Formulation ◽  
Polyhedral Mesh

OpenFOAM is an established object-oriented library for Computational Continuum Mechanics, with emphasis on CFD. It implements physical models of fluid flow, structural analysis, heat and mass transfer using equation mimicking, with unstructured polyhedral mesh support and massive parallelism in domain decomposition mode. In order to use OpenFOAM in turbomachinery CFD, its “general purpose” capabilities are enhanced with turbo-specific features, related to physics of rotating regions and rotor-stator interfaces. Handling for geometric simplifications of multi-blade and multi-stage rotating machines are implemented, including simple stage interfaces, non-equal pitch of blade passages, pitch-wise cyclicity and mixing plane averaging. In this paper we describe the implementation of turbomachinery-specific features in OpenFOAM, in the spirit of object orientation and C++. Emphasis is given to the basic functionality of turbo tools, software layout in OpenFOAM, numerical formulation of stage interfaces and their place in overall code design. The paper is concluded with examples of turbomachinery simulations, illustrating the capability of turbo tools on industrial cases of incompressible and compressible turbomachinery flows.

EXPERT SYSTEMS FOR THERMAL AND STRUCTURAL ANALYSIS IN ELECTRONIC SYSTEM DESIGN

1987 ◽  
Vol 01 (02) ◽  
pp. 223-235
Author(s):  
HSI-HO LIU ◽  
YING-NAN LAI ◽  
PEDRO CORTOPASSI
Keyword(s):  
Structural Analysis ◽  
Expert Systems ◽  
System Design ◽  
Engineering Design ◽  
Object Oriented ◽  
Electronic System ◽  
User Friendliness ◽  
Symbolic Reasoning ◽  
Object Oriented Approach ◽  
Conventional Systems

This paper presents an application of rule-based expert systems to thermal and structural analysis, part of mechanical engineering design, in electronic system design. The purpose of these expert systems is to serve as a consultant or design reviewer. These design expert systems are capable of performing both symbolic reasoning and numeric computation. The advantages of expert systems over conventional systems such as user friendliness, explanation and help facilities, and easy development and maintenance are also shown in this paper. Using system-subsystem tree structure several interrelated expert systems can be integrated into one system, and it is flexible for future expansion or modification. Object-oriented approach is also discussed, which with its unique representation of object could be a useful tool for engineering design.

A Prototype Tool for Analysis and Design of Floating Fish Cages

2005 ◽  
Author(s):  
Paul E. Thomassen ◽  
Bernt J. Leira
Keyword(s):  
Structural Analysis ◽  
Object Oriented ◽  
Hydrodynamic Load ◽  
Fish Farms ◽  
Analysis And Design ◽  
Load Models ◽  
Current State ◽  
Production Safety ◽  
Fish Cages ◽  
Farming Industry

Floating fish cages are the main means of production in the multi billion euro salmon farming industry. Despite its pivotal role in production safety, protection of values, as well as in protection of the environment, neither verified structural design procedures nor computer tools for structural analysis and design have received much attention. To a large extent they can be regarded as not being in accordance with the current state-of-the-art of structural analysis and design of slender marine structures. A momentum to move towards a more scientific based design approach has been created by the requirements of the recently introduced Norwegian certification criteria and the accompanying design code NS 9415. A prototype for analysis and design of floating fish cages has been developed and is described herein. The tool is based on an object-oriented framework for general FE analysis. The framework has among other things been developed with ease of extensibility for the software developer in mind. The prototype is thus intended for iterative extension of the functionality. In the first development iteration, described here, the FE framework has been extended, with hydrodynamic load models and a user interface for analysis of floating fish farms. The development of the prototype shows that by building on an object oriented FE framework, specialized and focused applications for aquaculture can be developed with limited effort. As an example analysis — and a possible benchmark — a simplistic model of a steel frame is chosen. Comparison of results obtained with different load formulations indicated that the buoyancy load was more important than the hydrodynamic load.

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