An Analysis of Stiffness Matrices of Tube Elements to Assess the Correctness of Modeling Curved Elements of Pipeline Systems

2020 ◽  
pp. 11-20
Author(s):  
V.V. Shelofast ◽  
V.V. Shelofast
Keyword(s):  
Large Scale ◽  
Engineering Analysis ◽  
Individual Approach ◽  
Modeling Procedure ◽  
Stiffness Matrices ◽  
Pipeline Systems ◽  
Analysis System ◽  
Curved Elements ◽  
Spatial Element

Large-scale work to create a Russian engineering analysis system involves the implementation of a considerable number of specialized tasks, each of which requires an individual approach and specific solutions. The calculation of pipeline systems that can most easily be performed in the version using rods is no exception. Such an approach is the most effective in terms of increasing the speed of calculations, increasing the dimension of the tasks performed, and most importantly, in simplifying the modeling procedure. In this paper, the authors consider the option of determining the stiffness matrices of a spatial element for modeling of pipes, which underlie the full engineering analysis of pipeline systems. Verification examples that confirm the reliability and correctness of the obtained solutions are presented.

scholarly journals Algorithmic Transparency of Large-Scale *AIDA Programs

2020 ◽  
Vol 30 (09) ◽  
pp. 1263-1288
Author(s):  
Yutaka Watanobe ◽  
Nikolay Mirenkov
Keyword(s):  
Data Structures ◽  
Large Scale ◽  
Software Systems ◽  
Computational Algorithms ◽  
Computer Language ◽  
Algorithms And Data Structures ◽  
Application Methods ◽  
Analysis System ◽  
Computational Comparison

Programming in pictures is an approach where pictures and moving pictures are used as super-characters to represent the features of computational algorithms and data structures, as well as for explaining the models and application methods involved. *AIDA is a computer language that supports programming in pictures. This language and its environment have been developed and promoted as a testbed for various innovations in information technology (IT) research and implementation, including exploring the compactness of the programs and their adaptive software systems, and obtaining better understanding of information resources. In this paper, new features of the environment and methods of their implementation are presented. They are considered within a case study of a large-scale module of a nuclear safety analysis system to demonstrate that *AIDA language is appropriate for developing efficient codes of serious applications and for providing support, based on folding/unfolding techniques, enhancing the readability, maintainability and algorithmic transparency of programs. Features of this support and the code efficiency are presented through the results of a computational comparison with a FORTRAN equivalent.

Flexible Non-Intrusive Heat Flux Instrumentation for the AFRL Research Turbine

2011 ◽  
Author(s):  
Richard J. Anthony ◽  
John P. Clark ◽  
Stephen W. Kennedy ◽  
John M. Finnegan ◽  
Dean Johnson ◽  
...  
Keyword(s):  
Thin Film ◽  
Heat Flux ◽  
Large Scale ◽  
Thermal Loading ◽  
Pressure Sensors ◽  
Large Data ◽  
Fast Response ◽  
Data Sets ◽  
Unsteady Aerodynamic ◽  
Analysis System

This paper describes a large scale heat flux instrumentation effort for the AFRL HIT Research Turbine. The work provides a unique amount of high frequency instrumentation to acquire fast response unsteady heat flux in a fully rotational, cooled turbine rig along with unsteady pressure data to investigate thermal loading and unsteady aerodynamic airfoil interactions. Over 1200 dynamic sensors are installed on the 1 & 1/2 stage turbine rig. Airfoils include 658 double-sided thin film gauges for heat flux, 289 fast-response Kulite pressure sensors for unsteady aerodynamic measurements, and over 40 thermocouples. An overview of the instrumentation is given with in-depth focus on the non-commercial thin film heat transfer sensors designed and produced in the Heat Flux Instrumentation Laboratory at WPAFB. The paper further describes the necessary upgrade of data acquisition systems and signal conditioning electronics to handle the increased channel requirements of the HIT Research Turbine. More modern, reliable, and efficient data processing and analysis code provides better handling of large data sets and allows easy integration with the turbine design and analysis system under development at AFRL. Example data from cooled transient blowdown tests in the TRF are included along with measurement uncertainty.

The Analysis and Design of Hospital Information System Based on UML Model

2010 ◽  
Vol 121-122 ◽  
pp. 441-446
Author(s):  
Qing Zhang Chen ◽  
Jie Chen ◽  
Yong Ming Yu
Keyword(s):  
Information System ◽  
Hospital Information System ◽  
Large Scale ◽  
System Analysis ◽  
System Modeling ◽  
Main Idea ◽  
Analysis And Design ◽  
Application Systems ◽  
Analysis System ◽  
Core Idea

In this paper, we used UML method to complete the whole hospital information system analysis and design. It is described the system and determine the requirement of system’s function. It also completes the system’s architecture design and detailed design and implement to the system. The main idea of thesis is as follows: 1）It adopt UML to object-oriented the modeling hospital information system, and will be a good way to solve a few questions from hospital information system in nowadays. 2）It moves around the main ideas of RUP (use-case driven, architecture-centric, iterative and incremental). At the beginning of get demand, through the system analysis, system design, until to the final of the system implementation. It adopts the stepwise deduction to go deep into the way of refining organization to anatomize the whole the process of the hospital information system. Through the success of the hospital information system modeling to prove that the core idea of the UML-based on RUP modeling techniques is practical in the development of large-scale of application systems. At the same time, it also prepared to provide a better reference and instance for the project or team to adopt this technology.

scholarly journals Can a Moderate-Resolution Limited-Area Data Assimilation System Add Value to the Global Analysis of Tropical Cyclones?

2013 ◽  
Vol 141 (6) ◽  
pp. 1866-1883 ◽  
Author(s):  
Christina R. Holt ◽  
Istvan Szunyogh ◽  
Gyorgyi Gyarmati
Keyword(s):  
Data Assimilation ◽  
Large Scale ◽  
Global Analysis ◽  
Flow Analysis ◽  
Horizontal Resolution ◽  
Limited Area ◽  
Northwest Pacific ◽  
Accurate Analysis ◽  
Analysis System ◽  
Area Data

Abstract This study investigates the benefits of employing a limited-area data assimilation (DA) system to enhance lower-resolution global analyses in the northwest Pacific tropical cyclone (TC) basin. Numerical experiments are carried out with a global analysis system at horizontal resolution T62 and a limited-area analysis system at resolutions from 200 to 36 km. The global and limited-area DA systems, which are both based on the local ensemble transform Kalman filter algorithm, are implemented using a unique configuration, in which the global DA system provides information about the large-scale analysis and background uncertainty to the limited-area DA system. The limited-area analyses of the storm locations are, on average, more accurate than those from the global analyses, but increasing the resolution of the limited-area system beyond 100 km has little benefit. Two factors contribute to the higher accuracy of the limited-area analyses. First, the limited-area system improves the accuracy of the location estimates for strong storms, which is introduced when the background is updated by the global assimilation. Second, it improves the accuracy of the background estimate of the storm locations for moderate and weak storms. Improvements in the steering flow analysis as a result of increased resolution are modest and short lived in the forecasts. Limited-area track forecasts are more accurate, on average, than global forecasts, independently of the strength of the storms up to five days. This forecast improvement is due to the more accurate analysis of the initial position of storms and the better representation of the interactions between the storms and their immediate environment.

A cloud-based large-scale distributed video analysis system

2016 ◽  
Author(s):  
Yongzhe Wang ◽  
Wei-Ta Chen ◽  
Huahui Wu ◽  
Anil Kokaram ◽  
Jaron Schaeffer
Keyword(s):  
Video Analysis ◽  
Large Scale ◽  
Analysis System

scholarly journals Identifying Critical Loads of Frame Structures with Equilibrium Equations in Rate Form

2015 ◽  
Vol 2015 ◽  
pp. 1-17
Author(s):  
Zhaohui Qi ◽  
Xianchao Kong ◽  
Gang Wang
Keyword(s):  
Stability Analysis ◽  
Critical Load ◽  
Large Scale ◽  
Frame Structures ◽  
Engineering Practice ◽  
Nonlinear Stability Analysis ◽  
Governing Equations ◽  
Equilibrium Equations ◽  
Stiffness Matrices ◽  
Rate Form

Frame structures are widely used in engineering practice. They are likely to lose their stability before damage. As an indicator of load-carrying capability, the first critical load plays a crucial role in the design of such structures. In this paper, a new method of identifying this critical load is presented, based on the governing equations in rate form. With the presented method, a great deal of well-developed numerical methods for ordinary differential equations can be used. As accurate structural tangent stiffness matrices are essential to stability analysis, the method to obtain them systematically is discussed. To improve the computational efficiency of nonlinear stability analysis in large-scale frame structures, the corotational substructure elements are formulated as well to reduce the dimension of the governing equations. Four examples are studied to illustrate the validity and efficiency of the presented method.

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