scholarly journals BANDED VAULTS IN TURIN: TLS SURVEY, GEOMETRIC INTERPRETATION, DIGITAL RE-CONSTRUCTION, BETWEEN DESIGN AND CONSTRUCTION. PALAZZO CAPRIS DI CIGLIÈ

2021 ◽  
Vol XLVI-M-1-2021 ◽  
pp. 793-800
Author(s):  
M. Vitali ◽  
M. C. López González ◽  
G. Bertola ◽  
F. Natta
Keyword(s):  
Survey Data ◽  
Geometric Interpretation ◽  
Parametric Model ◽  
Parametric Modeling ◽  
Focus Attention ◽  
Survey Analysis ◽  
Digital Modeling ◽  
Set Up ◽  
Design And Construction

Abstract. This contribution intends to focus attention on the banded vault (‘a fascioni’) that characterizes the atrium of the Capris di Cigliè Palace in Turin, whose construction is dated around 1730 and is attributed to Gian Giacomo Plantery (1680–1756).The work of survey, analysis, interpretation and digital modeling has been organized in phases (detailed respectively in the next paragraphs) which have allowed us to: study the criteria of architectural-geometric composition at the base of the complex vaulted system that is the object of the present study and to relate them to the most usual operative practices of construction, in particular to the realization and arrangement of the centerings; organize the survey on the basis of the main treatise and manual sources, in order to choose the most appropriate working methods; analyze survey data and set up a parametric model of geometric interpretation; make a comparison between the survey data and the interpretive model.In particular, the phases of geometric reading and interpretation, parametric modeling and discussion of the results were structured with the aim of studying in detail the different arches that define the structure of the banded vault.

scholarly journals Parametric Modeling of Solid Mechanics in Engineering Research Based on Cloud Computing Model

2020 ◽  
Author(s):  
Longji Jian ◽  
Feifei Song ◽  
Yuansong Huang
Keyword(s):  
Cloud Computing ◽  
Solid Mechanics ◽  
Parametric Model ◽  
Parametric Modeling ◽  
Parametric Models ◽  
Cloud Data ◽  
Engineering Research ◽  
Computing Model ◽  
Set Up ◽  
Computing Models

Abstract Traditional parametric models of solid mechanics have disadvantages such as poor lightweight level of cloud data and low integrity of operations of solid mechanics. To solve the above problems, a parametric model for solid mechanics in engineering research based on cloud computing models is designed. By calculating the number of cloud data copy optimizations, the upper limit of resources required for engineering research is estimated, and the specific values is assessed by continuously cycling the demand, so as to complete the basic conflict analysis, and set up a cloud computing engineering research environment. On this basis, the modeling index is selected. By analyzing the sensitivity of the index, the purpose of optimizing the modeling parameters is achieved, and a new solid mechanics parametric model is constructed. Analyzing and contrasting the experimental data shows that after applying the parametric model of solid mechanics in the engineering research based on the cloud computing model, the lightweight level of cloud data can be increased by up to 24 levels, and the operational integrity of solid mechanics can be increased by about 30%.

scholarly journals Using CFD to Evaluate Natural Ventilation through a 3D Parametric Modeling Approach

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2197
Author(s):  
Nayara Rodrigues Marques Sakiyama ◽  
Jurgen Frick ◽  
Timea Bejat ◽  
Harald Garrecht
Keyword(s):  
Natural Ventilation ◽  
Parametric Modeling ◽  
Cfd Simulations ◽  
3D Design ◽  
Post Process ◽  
Test House ◽  
Model Set ◽  
Computational Fluid Dynamics Cfd ◽  
Set Up ◽  
Passive Strategy

Predicting building air change rates is a challenge for designers seeking to deal with natural ventilation, a more and more popular passive strategy. Among the methods available for this task, computational fluid dynamics (CFD) appears the most compelling, in ascending use. However, CFD simulations require a range of settings and skills that inhibit its wide application. With the primary goal of providing a pragmatic CFD application to promote wind-driven ventilation assessments at the design phase, this paper presents a study that investigates natural ventilation integrating 3D parametric modeling and CFD. From pre- to post-processing, the workflow addresses all simulation steps: geometry and weather definition, including incident wind directions, a model set up, control, results’ edition, and visualization. Both indoor air velocities and air change rates (ACH) were calculated within the procedure, which used a test house and air measurements as a reference. The study explores alternatives in the 3D design platform’s frame to display and compute ACH and parametrically generate surfaces where air velocities are computed. The paper also discusses the effectiveness of the reference building’s natural ventilation by analyzing the CFD outputs. The proposed approach assists the practical use of CFD by designers, providing detailed information about the numerical model, as well as enabling the means to generate the cases, visualize, and post-process the results.

The Parametric Modeling and Contact Strength Analysis for the Wind Power Increasing Gear

2012 ◽  
Vol 522 ◽  
pp. 447-452
Author(s):  
Jing Luo ◽  
Mutellip Ahmat ◽  
Qiang Gao ◽  
Li Chao Ren
Keyword(s):  
Wind Power ◽  
Theoretical Basis ◽  
Optimization Design ◽  
3D Model ◽  
Parametric Modeling ◽  
Strength Analysis ◽  
Contact Strength ◽  
Set Up ◽  
Gear Contact ◽  
Designing Method

In this paper, the precise 3D model of the wind power increasing gear was set up by based on the parametric designing method of Pro/Program, then the contact strength of the gear was analyzed by the FEM and the Hertz theoretical value was calculated, the FEM and the Hertz results were contrasted in order to confirm the applicability of the numerical analysis in wind power gear contact analysis. Finally, the corresponding analysis conclusion was received.The researching results offered a effective theoretical basis for the optimization design and analysis of the wind increasing gear.

Optimization of Aircraft Mid-Fuselage Structure Design Based on Parametric Modeling

2014 ◽  
Vol 933 ◽  
pp. 423-427 ◽  
Author(s):  
Chao Ying Zhang ◽  
Hu Liu ◽  
Yun Peng Ma
Keyword(s):  
Structural Response ◽  
Aircraft Design ◽  
Element Model ◽  
Parametric Model ◽  
Structure Design ◽  
Parametric Modeling ◽  
Secondary Development ◽  
Typical Structure ◽  
Development Technology ◽  
Cae Technology

In aircraft preliminary design, fuselage structure design is important, and to reach the lightest weight is the main target for aircraft design, especially for civil aircraft. Based on CAD/CAE technology, the paper selects a typical structure layout form of aircraft mid-fuselage to study the method of structure model quickly creation and optimization. First, it focuses on fuselage parameterized modeling method, based on CATIA secondary development technology, to create the mid-fuselage parametric model. Then, based on Patran command language, the CAD model achieves automatic meshing. Finally, selecting an appropriate strategy and using iSIGHT integrated with fuselage parametric model and finite element model, and referring to the calculated the structural response by Nastran to realize mid-fuselage structure optimization.

The Finite Element Modal Analysis of Spur Gear Based on Patran

2014 ◽  
Vol 962-965 ◽  
pp. 2957-2960
Author(s):  
Qian Peng Han ◽  
Bo Peng
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Modal Analysis ◽  
Spur Gear ◽  
Parametric Model ◽  
Parametric Modeling ◽  
Element Analysis ◽  
General Process

This article summarized the general process of parametric modeling and finite element analysis of spur gear,PRO/E used to create parametric model,and Patran used to finite element analysis.Parametric modeling can reduce design period of the similar products,and modal analysis provide the basis for the selection and optimization of gear.

Parametric Modeling as a Tool of Analysis and Interpretation of Built Heritage

2019 ◽  
pp. 366-402
Author(s):  
Marco Vitali ◽  
Roberta Spallone ◽  
Francesco Carota
Keyword(s):  
Parametric Modeling ◽  
Design Criteria ◽  
Architectural Heritage ◽  
Modeling Tools ◽  
The Past ◽  
Built Heritage ◽  
Digital Modeling ◽  
Modeling Software

In this chapter are developed some considerations about the heuristic potentialities of parametric digital modeling as a tool for analyzing and interpreting architectural heritage. Observed that the parametric thinking in architecture could be recognized almost from the origin, new parametric modeling software allows to verify the design criteria of the past. On the basis of previous studies on Baroque vaulted atria, this chapter develops, using parametric modeling tools, a real vocabulary of shapes and their possible combinations, suggested by the architectural literature of the time and the survey of about seventy atria in Turin. This method has been tested on the case study of the lunettes dome in the atrium of Palazzo Carignano.

Numerical Research on Relationship between Displacement and Ground Overloading of Soil Nailing with FLAC

2012 ◽  
Vol 446-449 ◽  
pp. 1343-1347
Author(s):  
Jian Ping Sun ◽  
Guang Biao Shao ◽  
Zong Bao Jiang
Keyword(s):  
Numerical Analysis ◽  
Vertical Displacement ◽  
Soil Nailing ◽  
Flac 3D ◽  
Numerical Research ◽  
Set Up ◽  
Design And Construction

Based on an engineering example,the FLAC-3D was applied to set up numerical analysis,analyzing the influence of the overloading acting position and the magnitude on the horizontal and vertical displacement of the foundation pit.Some useful conclusion was obtained,which will offer reference to the design and construction of the soil nailing.

Presentation of RCC-MRx Code 2010 for Sodium Reactors (SFR), Research Reactor (RR) and Fusion (ITER): General Overview and CEN-Workshop

2011 ◽  
Author(s):  
T. Lebarbe´ ◽  
D. Hyvert ◽  
S. Marie ◽  
O. Gelineau ◽  
D. Bonne ◽  
...  
Keyword(s):  
High Temperature ◽  
Research Reactor ◽  
Vacuum Vessel ◽  
General Overview ◽  
French And English ◽  
European Code ◽  
Set Up ◽  
Design And Construction

A draft of the fifth edition of the RCC-MR code, named RCC-MRx 2010, has been issued in French and English versions on December 2010 by AFCEN (Association Franc¸aise pour les re`gles de Conception et de Construction des Mate´riels des Chaudie`res Electro-nucle´aires). This RCC-MRx Code is the result of the merger of the RCC-MX 2008 developed in the context of the research reactor Jules Horowitz Reactor project, in the RCC-MR 2007 which set up rules applicable to the design of components operating at high temperature and to the Vacuum Vessel of ITER. This is a non-public document established in order to prepare the fifth edition which will be published in French and English by AFCEN and will be named RCC-MRx 2012. By this next edition, AFCEN try to bring together all the relevant stakeholders in a CEN-Workshop (CEN-WS-MRx) in order to develop, on the RCC-MRx basis, the European code for the design and fabrication of mechanical equipments for ESNII innovative nuclear installations. This CEN Workshop (whose duration is 18 months, from January 2011) will allow the Workshop members to consider the RCC-MRx 2010 and to propose modifications to be included in the RCC-MRx 2012 edition to meet the needs of MYRRHA and ASTRID projects and to prepare the design and construction of ALFRED and ALLEGRO. This paper presents the code evolutions from the 2007 edition of the RCC-MR and describes the organization of the Workshop.

Inverse Parametric Modeling From Independently Generated Product Data Sets

2002 ◽  
Author(s):  
Zhengdong Huang ◽  
Derek Yip-Hoi
Keyword(s):  
Product Family ◽  
Parametric Model ◽  
Parametric Modeling ◽  
Data Sets ◽  
Data Set ◽  
Product Families ◽  
Part Family ◽  
Product Data ◽  
Feature Based ◽  
Parameter Ranges

Parametric modeling has become a widely accepted mechanism for generating data set variants for product families. These data sets that include geometric models and feature-based process plans are created by specifying values for parameters within feasible ranges specified as constraints in the definition. The ranges denote the extent or envelope of the product family. Increasingly, with globalization the inverse problem is becoming important. This takes independently generated product data sets that on observation belong to the same product family and creates a parametric model for that family. This problem is also of relevance to large companies where independent design teams may work on product variants without much collaboration only to attempt consolidation later on to optimize the design of manufacturing processes and systems. In this paper we present a methodology for generating a feature-based part family parametric model through merging independently generated product data sets. We assume that these data sets are feature-based with relationships such as precedences captured using graphs. Since there are typically numerous ways in which these data sets can be merged, we formulate this as an optimization problem and solve using the A* algorithm. The parameter ranges generated by this approach will be used to design appropriate Reconfigurable Machine Tools (RMTs) and systems (RMS) for manufacturing the resulting part family.

Bureaucratic Development and Social Science History

1978 ◽  
Vol 2 (4) ◽  
pp. 379-384
Author(s):  
Don Karl Rowney
Keyword(s):  
Social Science ◽  
The State ◽  
Power Relationships ◽  
Focus Attention ◽  
Science History ◽  
Social Science History ◽  
The Social ◽  
State Bureaucracy ◽  
Set Up ◽  
Political Decisions

The following essays originated in a session of the Social Science History Association in October, 1976. Two of the participants, Bernard S. Silberman and Alfred J. Rieber, were asked to prepare studies of bureaucracy in Japan and Russia which also dealt with the problems of political power relationships in developing bureaucracies. A third participant, Cyril E. Black, was asked to compare, criticize, and synthesize the first two papers in a third paper of his own. Briefly, the substantive point of these essays as a group is that they deal with the effect of political decisions in achieving certain changes in economic, technical, and military structures and operations. They focus attention on the effects within a complex apparatus set up to administer those political decisions, the state bureaucracy. The essays themselves reveal, and Black’s synthesis details, that the points of similarity between Japan and Russia as they change across time are as numerous and instructive as are the differences. In this introduction, I will call attention to some aspects of these studies which, although technical, are nevertheless important to the research enterprise they represent.

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