An Overview on 3D Site Modelling in Civil Engineering

2020 ◽  
pp. 108-127
Author(s):  
Muthuminal R.
Keyword(s):  
Computer Aided Design ◽  
Civil Engineering ◽  
Three Dimensional ◽  
3D Modelling ◽  
Scale Model ◽  
Dimensional Structure ◽  
Scale Modelling ◽  
Basic Concepts ◽  
A Site ◽  
Aided Design

In past decades, for developing a site, engineers used the process of creating a scale model in order to determine their behaviour and to sketch the details collected manually using the drafting process, which behaves as a referring material during the construction of structures. Due to the boom in technology and limitations in drafting, the drawings have been digitized using computer-aided design (CAD) software as a two-dimensional structure (2D). Currently, these drawings are detailed as a three-dimensional structure (3D) that is briefly noted as 3D modelling. Three-dimensional site modelling is an active area that is involved in research and development of models in several fields that has been originated from the scale modelling. In this chapter, the topic 3D site modelling in civil engineering is discussed. First of all, the basic concepts of scale modelling, architectural modelling, and structural modelling are discussed. Then the concept of virtual-based 3D site modelling, its importance, benefits, and steps involved in site modelling are briefed.

Application of Rapid Prototyping Technology in Intelligent Optimization Design Area

2013 ◽  
Vol 404 ◽  
pp. 754-757 ◽  
Author(s):  
Ludmila Novakova-Marcincinova ◽  
Jozef Novak-Marcincin
Keyword(s):  
Rapid Prototyping ◽  
Computer Aided Design ◽  
Optimization Design ◽  
Three Dimensional ◽  
Scale Model ◽  
Intelligent Optimization ◽  
Computer Aided ◽  
Aided Design

Rapid Prototyping (RP) can be defined as a group of techniques used to quickly fabricate a scale model of a part or assembly using three-dimensional Computer Aided Design (CAD) data. What is commonly considered to be the first Rapid Prototyping technique, Stereolithography was developed by 3D Systems of Valencia, CA, USA. The company was founded in 1986, and since then, a number of different Rapid Prototyping techniques have become available. In paper are presented possibilities of Rapid Prototyping application in area of intelligent optimization design.

Development of Powders for Selective Laser Sintering

2015 ◽  
Vol 760 ◽  
pp. 521-526
Author(s):  
Diana Irinel Băilă ◽  
Cristian Vasile Doicin ◽  
Oana Cătălina Mocioiu
Keyword(s):  
Automotive Industry ◽  
Computer Aided Design ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Laser Sintering ◽  
Machine Building ◽  
Scale Model ◽  
Sintering Process ◽  
Medical Instruments ◽  
Aided Design

The selective laser sintering is a technique used to quickly fabricate a scale model of a physical part or assembly using three-dimensional computer aided design CAD data. This technique is used to obtain complex pieces in different domains like machine building industry, automotive industry, foundry and medicine. The selective laser sintering process is used to obtain different prototypes, medical instruments or personalized implants in medicine. The powders used to obtain the medical instruments and for implants must to be very resistant to corrosion, non-toxic and present good fatigue resistance. The powders used are in generally, stainless steel, alloy titan TA6V, alloy Co-Cr and different polyamides.

scholarly journals A Technology-Computer-Aided-Design-Based Reliability Prediction Model for DRAM Storage Capacitors

Micromachines ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 256
Author(s):  
Woo Young Choi ◽  
Gyuhan Yoon ◽  
Woo Young Chung ◽  
Younghoon Cho ◽  
Seongun Shin ◽  
...  
Keyword(s):  
Prediction Model ◽  
Computer Aided Design ◽  
Dielectric Breakdown ◽  
Three Dimensional ◽  
Random Access ◽  
Reliability Prediction ◽  
Dimensional Structure ◽  
Storage Capacitor ◽  
Computer Aided ◽  
Aided Design

A full three-dimensional technology-computer-aided-design-based reliability prediction model was proposed for dynamic random-access memory (DRAM) storage capacitors. The model can be used to predict the time-dependent dielectric breakdown as well as leakage current of a state-of-the-art DRAM storage capacitor with a complex three-dimensional structure.

Computer-Aided Design of Thrombin Inhibitors

Physiology ◽  
1998 ◽  
Vol 13 (4) ◽  
pp. 182-189 ◽  
Author(s):  
Amedeo Caflisch ◽  
Rudolf Wälchli ◽  
Claus Ehrhardt
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Ligand Design ◽  
Research Field ◽  
Thrombin Inhibitors ◽  
Dimensional Structure ◽  
Computer Assisted ◽  
Affinity Ligands ◽  
Computer Aided ◽  
Aided Design

Computer-aided ligand design is an active, challenging, and multidisciplinary research field that blends knowledge of biochemistry, physics, and computer sciences. Whenever it is possible to experimentally determine or to model the three-dimensional structure of a pharmacologically relevant enzyme or receptor, computational approaches can be used to design specific high-affinity ligands. This article describes methods, applications, and perspectives of computer-assisted ligand design.

Precision Manufacturing Process of Parts Realized by FDM Rapid Prototyping

2013 ◽  
Vol 581 ◽  
pp. 292-297 ◽  
Author(s):  
Ludmila Novakova-Marcincinova ◽  
Jozef Novak-Marcincin ◽  
Miroslav Janak
Keyword(s):  
Rapid Prototyping ◽  
Computer Aided Design ◽  
Three Dimensional ◽  
Scale Model ◽  
Fused Deposition Modelling ◽  
Fused Deposition ◽  
Technology Preparation ◽  
Basic Characteristics ◽  
Aided Design ◽  
Selection Of

Rapid Prototyping (RP) can be defined as a group of techniques used to quickly fabricate a scale model of a part or assembly using three-dimensional computer aided design (CAD) data. What is commonly considered to be the first RP technique, Stereolithography, was developed by 3D Systems of Valencia, CA, USA. In this contribution are presented basic characteristics and problems in area of technology of Rapid Prototyping with use of Fused Deposition Modelling. It belongs to methods of precision model creation based on geometry obtained from CAD environment. Chapters are focused on optimization of FDM technology preparation process with aim of maximal precision of the parts. There also is algorithm that leads to selection of suitable settings for these problems. There are outputs in form of graph and tables accumulating information directly affecting precision aspects of manufacturing.

scholarly journals Computer-Aided Design and Kinematic Simulation of Huygens’s Pendulum Clock

2020 ◽  
Vol 10 (2) ◽  
pp. 538 ◽  
Author(s):  
Gloria Del Río-Cidoncha ◽  
José Ignacio Rojas-Sola ◽  
Francisco Javier González-Cabanes
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
3D Modelling ◽  
Kinematic Simulation ◽  
Final Assembly ◽  
Christiaan Huygens ◽  
Simple Chain ◽  
Pendular Movement ◽  
Aided Design ◽  
Pendulum Clock

This article presents both the three-dimensional modelling of the isochronous pendulum clock and the simulation of its movement, as designed by the Dutch physicist, mathematician, and astronomer Christiaan Huygens, and published in 1673. This invention was chosen for this research not only due to the major technological advance that it represented as the first reliable meter of time, but also for its historical interest, since this timepiece embodied the theory of pendular movement enunciated by Huygens, which remains in force today. This 3D modelling is based on the information provided in the only plan of assembly found as an illustration in the book Horologium Oscillatorium, whereby each of its pieces has been sized and modelled, its final assembly has been carried out, and its operation has been correctly verified by means of CATIA V5 software. Likewise, the kinematic simulation of the pendulum has been carried out, following the approximation of the string by a simple chain of seven links as a composite pendulum. The results have demonstrated the exactitude of the clock.

scholarly journals Blaise Pascal’s Mechanical Calculator: Geometric Modelling and Virtual Reconstruction

Machines ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 136
Author(s):  
José Ignacio Rojas-Sola ◽  
Gloria del Río-Cidoncha ◽  
Arturo Fernández-de la Puente Sarriá ◽  
Verónica Galiano-Delgado
Keyword(s):  
Computer Aided Design ◽  
Technological Development ◽  
Three Dimensional ◽  
3D Modelling ◽  
Blaise Pascal ◽  
Qualitative Information ◽  
3D Cad ◽  
Final Assembly ◽  
Virtual Reconstruction ◽  
Aided Design

This article shows the three-dimensional (3D) modelling and virtual reconstruction of the first mechanical calculating machine used for accounting purposes designed by Blaise Pascal in 1642. To obtain the 3D CAD (computer-aided design) model and the geometric documentation of said invention, CATIA V5 R20 software has been used. The starting materials for this research, mainly the plans of this arithmetic machine, are collected in the volumes Oeuvres de Blaise Pascal published in 1779. Sketches of said machine are found therein that lack scale, are not dimensioned and certain details are absent; that is, they were not drawn with precision in terms of their measurements and proportions, but they do provide qualitative information on the shape and mechanism of the machine. Thanks to the three-dimensional modelling carried out; it has been possible to explain in detail both its operation and the final assembly of the invention, made from the assemblies of its different subsets. In this way, the reader of the manuscript is brought closer to the perfect understanding of the workings of a machine that constituted a major milestone in the technological development of the time.

scholarly journals Computational Fluid Dynamics for Brain Circulation and Aneurysm with Therapeutic Devices

2004 ◽  
Vol 10 (2_suppl) ◽  
pp. 108-112 ◽  
Author(s):  
K. Fukasaku ◽  
M. Negoro ◽  
H. Iwase ◽  
K. Yokoi ◽  
R. Himeno
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Computer Aided Design ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Brain Vessels ◽  
Fluid Analysis ◽  
Brain Arteries ◽  
Aided Design ◽  
The Brain

We analysed fluid dynamics at brain arteries having multiple inflow and out flow like Willis ring based on clinical imaging modalities. In addition, we analysed fluid dynamics with therapeutic devices like coils and stents to simulate their influences to blood flow. 3D CTA and MRA obtained three-dimensional structures of the brain vessels. The centreline was obtained from the three dimensional structure. Diameter of the blood vessels was measured by 3D CTA/MRA then smooth surfaced blood vessel models were created. For the fluid analysis, we developed a home brew software which can display parameters such as streamline, etc. In addition, our CFD (computational fluid dynamics) software can work in collaboration with a CAD (computer aided design) software which we also developed (VCAD: Volume CAD). So, therapeutic devices such as coils, balloons and stents could be placed in the models and CFD analysis could be performed placing devices in the models. The flow pattern in the complicated vascular structure could be calculated such as Willis ring which has multiple inputs like ICA, VA and multiple outlets like MCA and PCA with communicating arteries. CFD with therapeutic devices could also analysed with our system.

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