Design of the Post-Processor for Rotors Dynamics Based on the STEP Standard

2013 ◽  
Vol 706-708 ◽  
pp. 1871-1876
Author(s):  
Bao Guo Liu ◽  
Hai Feng Hua ◽  
Long Wang Yue ◽  
Xiao Ding Xu
Keyword(s):  
Data Exchange ◽  
Parameter Extraction ◽  
Rotor Dynamics ◽  
Data Mapping ◽  
Analysis Software ◽  
Seamless Connectivity ◽  
Exchange Form ◽  
Whole Life Cycle ◽  
Rotor Model ◽  
Step Standard

The STEP standard is an international standard for data expressing and exchanging during the whole life cycle of the product, the neutral file is an universal data exchange form for the data exchanging. In order to develop a STEP post-processer for the rotor dynamics analysis software-Rotors Dynamics, the author elaborates the lexical analysis module and data mapping module, studies the rotor model parameter extraction based on STEP neutral file, and realizes the seamless connectivity between the Rotors Dynamics and the rotor’s CAD model.

Characteristics of Networked Manufacturing Resources

2010 ◽  
Vol 428-429 ◽  
pp. 528-532
Author(s):  
Kai Yin ◽  
Juan Tu ◽  
Xiao Jun Wang
Keyword(s):  
Resource Management ◽  
Data Exchange ◽  
Technology Development ◽  
Manufacturing Technology ◽  
Networked Manufacturing ◽  
Exchange Form ◽  
Manufacturing Resources ◽  
Network Manufacture ◽  
Classification Management

Along with the networked manufacturing technology development and deep research of resources classification, the question of resource management appears prominently. Resources attribute constitution has been analyzed under the network manufacture environment from the resources classification management; the resources attribute and the data exchange form have been proposed under the isomerism environment

Integration Infrastructure of Token-Based Industrial WSN and TCP

2011 ◽  
Vol 52-54 ◽  
pp. 1300-1305
Author(s):  
Wei Yan Hou ◽  
Zhao Hui Qin ◽  
Hai Kuan Wang
Keyword(s):  
Data Exchange ◽  
Communication Technologies ◽  
Data Mapping ◽  
Industrial Control ◽  
Data Buffer ◽  
Wired Networks ◽  
Protocol Conversion ◽  
Public Data ◽  
Mapping Mechanism ◽  
Master Module

As some prevalent wired networks in industrial field are based on TCP, we proposed a novel integration infrastructure of token-based industrial WSN protocol and TCP, so as to make the application of wireless communication technologies more flexible. In the paper, a protocol conversion infrastructure is presented, which is based on data mapping mechanism. The protocol converter includes two modules: Wireless Industrial Control Network(WICN) master module and TCP host module. WICN master module owns an exclusive data buffer called WICN data buffer. TCP host module also has its own data buffer which is named TCP data buffer. A public data area is used for realizing the data mapping between WICN data buffer and TCP data buffer. By the data mapping mechanism, a station in wired network segment could get the data from WICN by accessing TCP data buffer, and WICN slave station could get the data from wired network via WICN data buffer. By the protocol conversion mechanism based on data mapping, flexible data exchange of heterogeneous networks could be realized.

scholarly journals Developing a STEP-Compliant Multiagent on an Interoperable and Integrated CAD/CAM Platform

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
Alireza Mokhtar ◽  
Omid Fatahi Valilai
Keyword(s):  
Data Exchange ◽  
Feature Recognition ◽  
Data Communication ◽  
Practical Implementation ◽  
Seamless Integration ◽  
Fully Integrated ◽  
Cad Cam ◽  
Global Data ◽  
Step Standard

Practical implementation of a STEP-based architecture to provide a fully integrated and interoperable platform of data exchange has always been an intriguing issue. A variety of CAD/CAM environments are struggling to embed and support STEP standard and its protocols in order to seamlessly operate within global data exchange. However, apparent paucity of efficient and reliable structure for data communication, manipulation, and restoration has remarkably hindered the desired progress. In this paper, taking these shortcomings into account, a practical architecture is introduced and STEP-based agents are implemented and installed on the platform. Moreover, feature recognition, interaction, and machining precedence as crucial issues of CAD/CAM research have been considered in developing the interoperable platform. Seamless integration and interaction of CAD/CAM modules are provided in the proposed system. The prototype is finally verified and discussed through a case study.

Improvement of engine performance using an optimization procedure

2007 ◽  
Vol 221 (8) ◽  
pp. 1001-1014 ◽  
Author(s):  
B Kegl ◽  
S Pehan ◽  
M Kegl
Keyword(s):  
Optimal Design ◽  
Data Exchange ◽  
Engine Performance ◽  
Optimization Procedure ◽  
Design Parameters ◽  
Analysis Software ◽  
Design Variables ◽  
Gradient Based ◽  
Data Files ◽  
Engine Power

This paper presents a simple and effective approach to improve engine performance of a racing car with special requirements. Attention is focused on optimal design of the intake system, using a gradient-based approximation method of mathematical programming. Since optimization relies on accurate numerical analysis of engine processes, the sub-models and parameters needed in the analysis software are carefully determined by experiment. Subsequently, the influence of different design parameters of intake and exhaust systems on engine performance is investigated numerically. The most influencing parameters are selected to be the design variables in the optimization process. In order to improve engine power at several engine speeds, two different forms of the optimal design problem are proposed, solved, and compared as a means to identify the most appropriate one. Since the analysis software is a black-box program, the optimization procedure is implemented by employing the optimization software as a master (driver) program while the analysis software acts as the slave program. The data exchange between these programs is established by XML data files and suitable wrapper programs. The results obtained confirm the usefulness of the approach presented.

scholarly journals Encoding Conversion Algorithm of Quaternary Triangular Mesh

2021 ◽  
Vol 11 (1) ◽  
pp. 33
Author(s):  
Yihang Chen ◽  
Zening Cao ◽  
Jinxin Wang ◽  
Yan Shi ◽  
Zilong Qin
Keyword(s):  
Data Exchange ◽  
Simple Structure ◽  
Triangular Mesh ◽  
Data Mapping ◽  
Grid Systems ◽  
Key Technology ◽  
Conversion Algorithm ◽  
Information Construction ◽  
Conversion Rules ◽  
Big Data Technology

In the process of global information construction, different fields have built their own discrete global grid systems (DGGS). With the development of big data technology, data exchange, integration, and update have gradually become a trend, as well as the associative integration of different DGGS. Due to the heterogeneity of DGGS and the different encoding rules, how to build the encoding conversion rules and data mapping relationship between the same object in various DGGS is an effective support and key technology to achieve the interoperability of DGGS. As a kind of multipurpose DGGS, the quaternary triangular mesh (QTM) has become an effective spatial framework for constructing the digital earth because of its simple structure. At present, there are many schemes for QTM encoding research, which plays a key role in the development of QTM, but at the same time, it also leads to difficulties in the communication and integration of QTM under different encoding. In order to solve this problem, we explore the characteristics of QTM encoding, and put forward three conversion algorithms: resampling conversion algorithm, hierarchical conversion algorithm, and row–column conversion algorithm.

scholarly journals How BIM Contributes to a Building’s Energy Efficiency throughout Its Whole Life Cycle: Systematic Mapping

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6680
Author(s):  
Tatjana Vilutienė ◽  
Rasa Džiugaitė-Tumėnienė ◽  
Diana Kalibatienė ◽  
Darius Kalibatas
Keyword(s):  
Life Cycle ◽  
Process Model ◽  
Data Exchange ◽  
Information Technologies ◽  
Energy Performance ◽  
Information Modeling ◽  
Systematic Mapping ◽  
Other Information ◽  
Building Life Cycle ◽  
Whole Life Cycle

This paper presents a systematic mapping (SM) study with the aim to determine how Building Information Modeling (BIM) methodologies and technologies contribute to energy-related analyses over the course of the entire building life cycle. The method adopted in the study is based on a set of seven research questions. We used a mixed technique combining co-citation analysis and bibliographic coupling in order to analyze the publications’ datasets for the period 2010–2020. The main advantage and novelty of this study are that the joint dataset from the Scopus and Web of Science databases was used to develop the keyword map. The main findings of this study indicate that many BIM-based applications can be used to analyze the building energy performance at all stages of the building life cycle. However, the applications of BIM in conjunction with other information technologies are limited and are still in the initial stage. In the future, the main improvements should be focused on process, model, system, tool, use and information modeling. The most promising long-term solution is an open BIM framework based on open standards, which allows the integration of BIM and energy simulation tools and satisfies specific data exchange requirements.

The NIDDESC Ship Product Model: The STEP Solution

1994 ◽  
Vol 10 (01) ◽  
pp. 39-50
Author(s):  
Richard H. Lovdahl ◽  
Douglas J. Martin ◽  
Michael A. Polini ◽  
Ron W. Wood ◽  
Michael L. Gerardi ◽  
...  
Keyword(s):  
Data Exchange ◽  
Digital Data ◽  
Model Data ◽  
Product Model ◽  
International Standard ◽  
Layered Architecture ◽  
Approach Goals ◽  
Step Standard

This paper presents the purpose, approach, goals and progress of the tasks that make up the standard for a digital Ship Product Model. The Navy/Industry Digital Data Exchange Standards Committee (NIDDESC) Standards will be a part of the Standard for the Exchange of Product Model Data (STEP) International Standard. The STEP standard has a layered architecture in which basic core definitions are used by many industry and product specific standards such as the NIDDESC Standards.

Prediction of Structural Supports Influence on Rotating Machinery Dynamics

2017 ◽  
Author(s):  
Leonid Moroz ◽  
Leonid Romanenko ◽  
Roman Kochurov ◽  
Evgen Kashtanov
Keyword(s):  
Support System ◽  
System Analysis ◽  
Element Model ◽  
Critical Issue ◽  
Rotor Dynamics ◽  
Mode Shapes ◽  
Response Analysis ◽  
Research Activities ◽  
Rotor Bearing ◽  
Rotor Model

Rotor lifetime and safety primarily depend on the level of rotor vibration. In order to avoid unwanted consequences for the plant due to rotor damage and to meet the highest requirements of design reliability, accurate rotor dynamic predictions are mandatory. Having the correct rotor model is a critical issue in dynamics prediction. Often research activities are focused only on the rotor-bearing system analysis. However, generally, the whole system, which includes the rotor, bearings, casing and structural supports should be considered. Special attention should be paid to the influence of structural supports which reveals when the rotor is supported by ball bearings because of low damping and high bearing stiffness. The approach presented in this paper allows us to simulate the influence of structural supports on rotor dynamics response and as a result, the full picture of rotor-bearing-support system resonances can be analyzed to avoid potential problems. The methodology is based on support vibrations modal reduction technics. According to the approach, the natural frequencies and their mode shapes should be calculated for the separate support structure applying a three-dimensional finite element model and the relative displacements at bearing location points are measured. Supports’ normalized modal characteristics (modal mass and modal stiffness) for each vibration mode should then be imported in a rotor dynamics algorithm for rotor unbalance response analysis. The approach allows for simulation of different types of support structures such as bearing pedestals, steel foundations, tabletop-type foundation, frame and pipe supports of arbitrary geometry, and so on. Validation based on the Jeffcott rotor model is presented. The current methodology has been applied to a single-stage compressor’s rotor-bearing-support system which was manufactured and commissioned. The results of the simulations are discussed.

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