Aircraft Conceptual Structural Design Using The AMMIT Structural Analysis Tool

2019 ◽  
Author(s):  
Bryce L. Horvath
Keyword(s):  
Structural Analysis ◽  
Structural Design ◽  
Analysis Tool

Multi-disciplinary analysis and optimisation methodology for conceptual design of a box-wing aircraft

2016 ◽  
Vol 120 (1230) ◽  
pp. 1315-1333 ◽  
Author(s):  
Ishan Roy Salam ◽  
Cees Bil
Keyword(s):  
Structural Analysis ◽  
Conceptual Design ◽  
Structural Design ◽  
Design Methodology ◽  
Vortex Lattice ◽  
Design Space ◽  
Analysis Tool ◽  
Analysis Methodology ◽  
Fuel Burn ◽  
Design Perspective

ABSTRACTThis paper presents a multi-disciplinary analysis methodology for a box-wing aircraft configuration optimised for a given mission scenario. This conceptual design methodology and associated toolchain combines well-established vortex lattice analysis and a newly developed structural analysis tool called WingMASS, allowing the design space to be explored from a combined aerodynamics and structural design perspective. For a given mission scenario, the method optimises a box-wing configuration and compares it with an equivalent conventional configuration. This study shows that, for a given mission, a box-wing configuration can lead to a fuel burn reduction of up to 5% by optimising aspect ratio, horizontal and vertical wing separation.

Influence of the distribution of the shear walls on the seismic response of the buildings

2020 ◽  
Vol 15 (1) ◽  
pp. 37-44
Author(s):  
El Mehdi Echebba ◽  
Hasnae Boubel ◽  
Oumnia Elmrabet ◽  
Mohamed Rougui
Keyword(s):  
Structural Analysis ◽  
Seismic Response ◽  
Natural Frequency ◽  
Structural Design ◽  
Structural Response ◽  
Shear Walls ◽  
Structural Elements ◽  
Analysis Software ◽  
Ansys Apdl ◽  
The Impact

Abstract In this paper, an evaluation was tried for the impact of structural design on structural response. Several situations are foreseen as the possibilities of changing the distribution of the structural elements (sails, columns, etc.), the width of the structure and the number of floors indicates the adapted type of bracing for a given structure by referring only to its Geometric dimensions. This was done by studying the effect of the technical design of the building on the natural frequency of the structure with the study of the influence of the distribution of the structural elements on the seismic response of the building, taking into account of the requirements of the Moroccan earthquake regulations 2000/2011 and using the ANSYS APDL and Robot Structural Analysis software.

Coupling of a Reactor Analysis Code and a Lower Head Thermal Analysis Solver

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Hiroshi Madokoro ◽  
Alexei Miassoedov ◽  
Thomas Schulenberg
Keyword(s):  
Structural Analysis ◽  
Message Passing ◽  
Message Passing Interface ◽  
Severe Accident ◽  
Coupled Analysis ◽  
Accident Analysis ◽  
Analysis Tool ◽  
Lower Head ◽  
Calculation Results ◽  
Reactor Pressure

Due to the recent high interest on in-vessel melt retention (IVR), development of detailed thermal and structural analysis tool, which can be used in a core-melt severe accident, is inevitable. Although RELAP/SCDAPSIM is a reactor analysis code, originally developed for U.S. NRC, which is still widely used for severe accident analysis, the modeling of the lower head is rather simple, considering only a homogeneous pool. PECM/S, a thermal structural analysis solver for the reactor pressure vessel (RPV) lower head, has a capability of predicting molten pool heat transfer as well as detailed mechanical behavior including creep, plasticity, and material damage. The boundary condition, however, needs to be given manually and thus the application of the stand-alone PECM/S to reactor analyses is limited. By coupling these codes, the strength of both codes can be fully utilized. Coupled analysis is realized through a message passing interface, OpenMPI. The validation simulations have been performed using LIVE test series and the calculation results are compared not only with the measured values but also with the results of stand-alone RELAP/SCDAPSIM simulations.

Structural Optimization on Topside Supports for Ship-Shaped Hulls

2002 ◽  
Author(s):  
Christiane Lopes Machado ◽  
Marco Antonio Santos
Keyword(s):  
Structural Analysis ◽  
Structural Optimization ◽  
Structural Design ◽  
Steel Reinforcement ◽  
Longitudinal Structure ◽  
Transverse Structure ◽  
Cost And Benefit ◽  
Campos Basin ◽  
Steel Weight

PROJEMAR S. A., a naval and offshore design company at Brasil has developed several conversion projects of FPSO’s to operate at Campos Basin. This way, PROJEMAR faced some interface difficulty in the structural design of the topside supports, mainly for the vessel reinforcement. The structural analysis of the cargo region, when performed together with the topside supports and loads, introduces significant buckling and fatigue problems in the main transverse and longitudinal structure of the vessel. The solution adopted in first instance is to reinforce the transverse structure and longitudinal bulkheads of the cargo tanks just below the topside supports. This reinforcement is expensive and takes a lot of time to be done, as hundreds of buckling bars should be installed. In order to avoid this work inside the cargo region, PROJEMAR evaluated this study to minimize the steelwork inside the cargo region, and to optimize the steel weight for topside supports. PROJEMAR analyzed three different concepts of topside supports: two transverse bulkheads supporting each topside module, two sets of strong brackets supporting each topside module, and sets of pillars supporting each topside modules. The results present the amount of steelwork inside and outside the cargo tanks, the total amount of steel reinforcement after the evaluation of stress, deflection, buckling and fatigue verification. The conclusions present cost and benefit for each solution, and some discussions on the time acceleration for the conversion.

Structural Analysis of a Grinding Machine with Linear Motion Guide Applied

2013 ◽  
Vol 336-338 ◽  
pp. 1014-1019
Author(s):  
Seon Yeol Oh ◽  
Han Seok Bang ◽  
B. Y. Choi ◽  
Woo Chun Choi ◽  
S. J. Cho
Keyword(s):  
Finite Element ◽  
Structural Analysis ◽  
Structural Design ◽  
Element Model ◽  
Linear Motion ◽  
Precision Grinding ◽  
Base Side ◽  
Ultra Precision ◽  
Linear Motion Guide ◽  
Grinding Machine

A finite element model of an ultra-precision grinding machine that can have high precision and high stiffness is constructed and structural analysis is done with equivalent stiffnesses of linear motion guides by after structural design and the deformation of the grinding machine is obtained. In order to reduce the deformation of the grinding machine that causes bad influence, structural complement is conducted by adding ribs at the lower part of the column. Also, the straightness of the grinding machine is improved by lifting that the base side of the column.

scholarly journals A thermal structural analysis tool for RPV lower head behavior during severe accidents with core melt

2018 ◽  
Vol 4 (0) ◽  
pp. 18-00038-18-00038 ◽  
Author(s):  
Hiroshi MADOKORO ◽  
Alexei MIASSOEDOV ◽  
Thomas SCHULENBERG
Keyword(s):  
Structural Analysis ◽  
Analysis Tool ◽  
Severe Accidents ◽  
Lower Head

scholarly journals Structural analysis by interval approach

2008 ◽  
pp. 869-880
Author(s):  
Franck Massa ◽  
Karine Mourier-Ruffin ◽  
Bertrand Lallemand ◽  
Thierry Tison
Keyword(s):  
Sensitivity Analysis ◽  
Finite Element ◽  
Structural Analysis ◽  
Design Process ◽  
Structural Design ◽  
Numerical Models ◽  
Test Case ◽  
Design Phase ◽  
Deterministic Analysis ◽  
Interval Approach

Finite element simulations are well established in industry and are an essential part of the design phase for mechanical structures. Although numerical models have become more and more complex and realistic, the results can still be relatively far from observed reality. Nowadays, use of deterministic analysis is limited due to the existence of several kinds of imperfections in the different steps of the structural design process. This paper presents a general non-probabilistic methodology that uses interval sets to propagate the imperfections. This methodology incorporates sensitivity analysis and reanalysis techniques. Numerical interval results for a test case were compared to experimental interval results to demonstrate the capabilities of the proposed methodology.

scholarly journals Analysis of the application of physics in the design and construction of architectural projects. The Eiffel Tower

2021 ◽  
Vol 2118 (1) ◽  
pp. 012021
Author(s):  
J D González-Almeyda ◽  
E T Ayala-Garcia ◽  
R Prada-Nuñez
Keyword(s):  
Structural Analysis ◽  
Structural Design ◽  
Methodological Framework ◽  
Basic Physics ◽  
Descriptive Approach ◽  
Convenience Sampling ◽  
Basic Concepts ◽  
Quantitative Descriptive ◽  
The Impact ◽  
Design And Construction

Abstract This article studied the impact and application of physical concepts in the design and construction of the Eiffel Tower in Paris, an architectural reference that implemented physical concepts in its structural design. A documentary methodological framework was used to establish the importance of the Eiffel Tower in the universal exposition of Paris in 1989 and, to carry out the structural analysis of the work; a quantitative-descriptive approach was used for the recognition of the basic concepts of physics from architecture according to gender, through a survey as a research instrument developed under non-probability and convenience sampling, which was applied to students of Architecture of the Universidad Francisco de Paula Santander, Colombia, in order to determine the knowledge of basic physics by students. The results of this research showed that the Eiffel Tower represents a milestone in architecture where physical concepts such as tension, compression, traction, aerodynamics, and torque were applied. Finally, it was evidenced that the students who participated in this study recognize the importance of applying the basic concepts of physics in architecture; fact by which it is recommended to encourage the study of physics, to strengthen the technological component of Architecture.

Set-Based Design Method for the Early Phase Design of Structures With Uncertainties

2010 ◽  
Author(s):  
Masato Inoue ◽  
Yutaka Hattori ◽  
Haruo Ishikawa
Keyword(s):  
Structural Design ◽  
Early Phase ◽  
Design Method ◽  
Analysis Tool ◽  
Design Variables ◽  
Point Solution ◽  
Design Solutions ◽  
Set Based Design ◽  
Express Information ◽  
Analyze Structure

Since an early phase of design intrinsically contains uncertainties from various sources of variations, design performances are fluctuating or reflect uncertainty caused by uncertain design variables. Analysis tool such as finite element method (FEM) is useful for structural analysis. However, using unique point solution does not express information about uncertainties. Designers need to figure out an outline of the structural feature and have to obtain a design idea under some uncertain design information in a structural design at the early phase of design. We have proposed a preference set-based design (PSD) method that generates a ranged set of design solutions that satisfy sets of performance requirements. This study proposes a structural design method for the early phase of design based on the PSD method that is possible to analyze structure with design uncertainty by elastic FEM and obtain a ranged set of design solutions. That is, a design method for analyzing structures and obtaining a ranged set of design solutions with uncertainties of material property and dimension of structure (coordinates of geometry) under fluctuating distribution of performance characteristics of stress and displacement is proposed. In order to illustrate the availability of our approach, design problem of 3-dimensional truss structure is solved.

Structural Design Optimization of the Rotary Table of a Floor Type Boring Machine for Minimum Weight and Compliance by Using GA

2012 ◽  
Vol 271-272 ◽  
pp. 1421-1426 ◽  
Author(s):  
Hyun Bok Lee ◽  
Ji Han Oh ◽  
Chang Hwan Oh ◽  
Young Hyu Choi
Keyword(s):  
Genetic Algorithm ◽  
Structural Analysis ◽  
Structural Design ◽  
Minimum Weight ◽  
Optimized Design ◽  
Rotary Table ◽  
High Rigidity ◽  
Structural Design Optimization ◽  
Boring Machines ◽  
Empirical Design

Recently needs of extra-large floor type boring machines have been increased according to super-sizing ships and aircrafts including wind turbines. The rotary table of a supersize floor type boring machine to be developed in this study can support ultra heavyweight workpieces more than 200 tons and be rotated with a speed of 300 deg/min. Therefore, it is designed as a high rigidity structure and requires high rigidity bearings. Thus, hydrostatic bearings are used in this rotary table. For optimizing the rotary table of a floor type boring machine as a lightweight and high rigidity structure, an optimized design is performed using an FEM structural analysis and a genetic algorithm (GA). As a result, it represents a decrease in weight 22.2% and an increases in rigidity 8.56% compared to that of the conventional method based on empirical design.

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