scholarly journals Decomposition analysis and peak stagger design for Crank-triangular linkage-elbow mechanism of mechanical servo presses

2021 ◽  
Vol 22 ◽  
pp. 43
Author(s):  
Yousong Sun ◽  
Jianguo Hu ◽  
Liangmo Wei ◽  
Yongqi Chen
Keyword(s):  
Design Method ◽  
Decomposition Analysis ◽  
Structural Parameter ◽  
Preliminary Design ◽  
Working Mechanism ◽  
Mechanical Advantage ◽  
Analysis And Design ◽  
Simulation And Optimization ◽  
Bottom Dead Center ◽  
Working Performance

High mechanical advantage as well as low and steady slide speed within the working stroke Sn are the fundamental requirements for the working mechanism of servo-mechanical press. Currently, the Crank-Triangular Linkage-Elbow (CTLE) mechanism has attracted more and more attention from researchers and manufacturers of servo presses. This paper presents a new analysis and design method of CTLE. The mechanism is decomposed into two sub-units: crank and triangular-linkage elbow, followed by the kinematic and force analysis of each sub-unit. The influences of each structural parameter on the working performance are obtained and can be used as the basis for preliminary design. Through the offset design, the mechanical advantage peaks of the two units, MA1max and MA2max, do not occur at the same time: MA1max is located near Sn, while MA2max is just at BDC (Bottom Dead Center). Because the mechanical advantage of the whole mechanism is the product of the two subunits, the designed mechanism can obtain high and steady mechanical advantage together with low and steady slide speed within Sn. After preliminary design, the scheme can be further modified by numerical simulation and optimization. Hence the design efficiency can be improved.

Preliminary design of the kinematic Stirling engine using dynamic similarity and quasi-static simulation

1997 ◽  
Vol 211 (3) ◽  
pp. 229-238 ◽  
Author(s):  
J I Prieto ◽  
J Fano ◽  
C González ◽  
M A González ◽  
R Diaz
Keyword(s):  
Design Method ◽  
Preliminary Design ◽  
Test Results ◽  
Power Losses ◽  
Scaling Factors ◽  
Numerical Examples ◽  
Analysis And Design ◽  
Dynamic Similarity ◽  
Power Maps ◽  
Static Simulation

This paper presents a preliminary design method based on dynamic similarity and quasistatic simulation. The proposal improves methods based on Beale and West correlations and provides the engine speeds corresponding to the maximum indicated powers and the achievement of indicated power maps. The dimensionless factor of indicated power losses provides a new viewpoint for engine analysis and design. In support of the method, experimental GPU-3 test results have been reanalysed, proving the accuracy of maximum indicated power predictions and providing values of the dimensionless factor of indicated power losses. Scaling factors corresponding to strict dynamic similarity are supplied for several typical cases. Similarity relaxation criteria are also recommended to be used when strict dynamic similarity leads to inadequate specifications for the derivative. Some numerical examples illustrate the method.

Design and Multiparameter Optimization of Jet-Pumps in a Pipeline Loops Using CFD Tools

2018 ◽  
Author(s):  
Jens Toteff ◽  
Miguel Asuaje Tovar
Keyword(s):  
Design Method ◽  
Oil Field ◽  
Dynamics Simulation ◽  
Preliminary Design ◽  
Centrifugal Pumps ◽  
Simulation And Optimization ◽  
Flow Capacity ◽  
Operational Variables ◽  
Jet Pumps ◽  
Low Efficiency

Despite their low efficiency compared with centrifugal pumps, jet-pumps are highly reliable robust equipment with modest maintenance which is ideal for many applications, mostly in the oil & gas industry. For example, jet-pumps could result attractive compared to other multiphase pump systems in terms of reactivating transport lines of heavy crude oil. Nevertheless, their design method and performance analysis are rarely known in the literature and keep a high experimental component like most of the pumping equipment. Starting with a pump designed by a traditional method, this paper aims to evaluate the effect of multiple geometrical and operational variables that influence the jet-pump performance combining CFD (Computational Fluid Dynamics) simulation and optimization algorithms using commercials software (ANSYS CFX® and PIPEIT® tool). Automatically, the geometric parameters are modified according to the rules of the optimization routines seeking to maximize the flow capacity, respecting restrictions such as energy consumption. A case study is presented for the preliminary design of a pump to boost flow capacity in a trunk line of a heavy oil field. As preliminary design all simulations were carried out using single phase water flow. With this method, it was possible to quickly evaluate around 400 geometries of jet-pumps. The geometry of the optimum final pump is consistent with other pumps reported by other works. This pump enhances the fluid capacity of the line in 17% over the traditional design for the same parameters of power or consumed energy.

Pengembangan Sistem Informasi Siklus Pendapatan pada PT XYZ (Pendekatan Studi Kasus)

2014 ◽  
Vol 5 (1) ◽  
pp. 12-19
Author(s):  
Yohannes Kurniawan ◽  
Janastasha Christie Parapaga
Keyword(s):  
Information System ◽  
Information Systems ◽  
Business Processes ◽  
Design Method ◽  
Accounting Information ◽  
Accounting Information System ◽  
Accounting Information Systems ◽  
Analysis And Design ◽  
Research Goal ◽  
Revenue Cycle

The research goal is to identify and analyze the need of accounting information system related to the revenue cycle at PT XYZ. This paper designing the useful of accounting information systems to support the current business processes, especially on the revenue cycle process. The design method is an Object Oriented Analysis and Design (OOAD) which refers to the modeling and design requirements discipline. And the result achieved by analysis and design of accounting information systems can support current activities of the revenue cycle, especially for the documentation and store of transaction data, and generate reports in accordance with company requirements. Conclusions derived from the analysis and design is the implementation of a webbased application that can help PT XYZ to do the work in different places, such as marketing office, head office and especially at the exhibition. Index Terms - Accounting Information System, revenue cycle, OOAD 

Impact of Secondary Flow on the Accuracy of Simplified Design Methods for Steam Turbine Stages

2012 ◽  
Author(s):  
Jan Schumann ◽  
Ulrich Harbecke ◽  
Daniel Sahnen ◽  
Thomas Polklas ◽  
Peter Jeschke ◽  
...  
Keyword(s):  
Secondary Flow ◽  
Steam Turbine ◽  
Design Process ◽  
Design Method ◽  
Computing Time ◽  
Leading Edge ◽  
Design Methods ◽  
Preliminary Design ◽  
Line Design ◽  
Radial Equilibrium

The subject of the presented paper is the validation of a design method for HP and IP steam turbine stages. Common design processes have been operating with simplified design methods in order to quickly obtain feasible stage designs. Therefore, inaccuracies due to assumptions in the underlying methods have to be accepted. The focus of this work is to quantify the inaccuracy of a simplified design method compared to 3D Computational Fluid Dynamics (CFD) simulations. Short computing time is very convenient in preliminary design; therefore, common design methods work with a large degree of simplification. The origin of the presented analysis is a mean line design process, dealing with repeating stage conditions. Two features of the preliminary design are the stage efficiency, based on loss correlations, and the mechanical strength, obtained by using the beam theory. Due to these simplifications, only a few input parameters are necessary to define the primal stage geometry and hence, the optimal design can easily be found. In addition, by using an implemented law to take the radial equilibrium into account, the appropriate twist of the blading can be defined. However, in comparison to the real radial distribution of flow angles, this method implies inaccuracies, especially in regions of secondary flow. In these regions, twisted blades, developed by using the simplified radial equilibrium, will be exposed to a three-dimensional flow, which is not considered in the design process. The analyzed design cases show that discrepancies at the hub and shroud section do exist, but have minor effects. Even the shroud section, with its thinner leading-edge, is not vulnerable to these unanticipated flow angles.

AN OPTIMIZATION MODEL FOR PRELIMINARY STABILITY AND CONFIGURATION ANALYSES OF SEMI-SUBMERSIBLES

2021 ◽  
Vol 159 (A3) ◽  
Author(s):  
G D Gosain ◽  
R Sharma ◽  
Tae-wan Kim
Keyword(s):  
Optimization Model ◽  
Design Method ◽  
Optimization Techniques ◽  
Design Approach ◽  
Preliminary Design ◽  
Design Environment ◽  
Preliminary Stage ◽  
Steel Weight ◽  
Motion Characteristics ◽  
Almost All

In the modern era of design governed by economics and efficiency, the preliminary design of a semi-submersible is critically important because in an evolutionary design environment new designs evolve from the basic preliminary designs and the basic dimensions and configurations affect almost all the parameters related to the economics and efficiency (e.g. hydrodynamic response, stability, deck load and structural steel weight of the structure, etc.). The present paper is focused on exploring an optimum design method that aims not only at optimum motion characteristics but also optimum stability, manufacturing and operational efficiency. Our proposed method determines the most preferable optimum principal dimensions of a semi-submersible that satisfies the desired requirements for motion performance and stability at the preliminary stage of design. Our proposed design approach interlinks the mathematical design model with the global optimization techniques and this paper presents the preliminary design approach, the mathematical model of optimization. Finally, a real world design example of a semi-submersible is presented to show the applicability and efficiency of the proposed design optimization model at the preliminary stage of design.

scholarly journals HOTEL RESORT DI TELAGA SARANGAN

Arsitektura ◽  
2017 ◽  
Vol 14 (1) ◽  
Author(s):  
Dewi Saraswati ◽  
Ahmad Farkhan ◽  
Amin Sumadyo
Keyword(s):  
Architectural Design ◽  
Negative Impact ◽  
Design Method ◽  
Building Design ◽  
Problem Formulation ◽  
Design Concept ◽  
Preliminary Design ◽  
Literature Study ◽  
Initial Idea ◽  
Resort Hotel

<em>The design of Sarangan Lake resort done by the needs of tourist on its area, unfullfield of tourist needs on accommodation facilities, increasing number of uncare building towards negative impact to the environment, so the purpose from this design is to get a building design that could provide accommodation facilities to the tourist of Sarangan Lake, with the design that concern about environment. The design issue is how ecological architect can be applied into design of Sarangan Lake resort. Design method is using architectural design, started from initial idea, preliminary understanding of architecture about the planned object, research and problem formulation, literature study as substantial reference, data analysis and information, analysis of general and specific approach towards designed object and formulation of design concept, analysis of design concept approach which more specific about the to-be-designed object, and architectural design transformation and preliminary design as well. The result is a design concept of resort hotel facilities as lodging accommodations by applying the characteristic of the ecological architect to the building design.</em>

scholarly journals Preliminary Optimization of Multi-Stage Axial-Flow Industrial Process Compressors Using Aero-Engine Compressor Design Strategy

2021 ◽  
Vol 11 (19) ◽  
pp. 9248
Author(s):  
Fan Lei ◽  
Chuhua Zhang
Keyword(s):  
Optimal Design ◽  
Gas Turbines ◽  
Design Method ◽  
Industrial Process ◽  
Design Strategy ◽  
Preliminary Design ◽  
Stage Design ◽  
Compressor Design ◽  
Aero Engine ◽  
Engine Compressor

Aero-engine core compressor preliminary design strategy has been successfully applied to the advanced design of gas turbines compressors. However, few researchers have addressed the application of the aero-engine core compressor preliminary design strategy in the preliminary optimal design of industrial process compressors. Here we embedded the aero-engine core compressor preliminary design strategy into a preliminary optimal design method, in which six types of design parameters widely used to define the aero-engine compressor configuration, i.e., aspect ratio, solidity, reaction, rotation speed, outlet axial Mach number, and inlet radius ratio, were used as the design variables. The 4-stage, 5-stage, 6-stage, and 7-stage compressor configuration with the same overall design requirements for a large-scale air separation main compressor were preliminarily optimized by the developed method, in which the 4-stage design has a stage pressure rise level of current aero-engine core compressors, whereas the 7-stage design has that of current industrial process compressors. The optimized compressor configurations were then refined with the throughflow-based detailed design method and finally verified with computational fluid dynamic simulations. It is found that the developed method can optimize design efficiency and accurately predict aerodynamic performance of compressors in a few minutes. Several design guidelines for the advanced industrial process compressors were also identified. This work is of significance in extending aero-engine core compressor design strategy to the design of advanced industrial process compressors.

scholarly journals Analysis and Design of E-Commerce Information Systems Using the User Centered Design Method at PT. Pure Healthy Nature

Tech-E ◽  
2019 ◽  
Vol 2 (2) ◽  
pp. 16
Author(s):  
Amelia Andi ◽  
Yakub Yakub
Keyword(s):  
Design Method ◽  
User Centered Design ◽  
Activity Diagram ◽  
Marketing Department ◽  
Analysis And Design ◽  
Program Language ◽  
System Use ◽  
Uml Activity Diagram ◽  
Search Information ◽  
User Centered

PT.Murni Alam Sehat is one of company sell medical device and medicine by prescription or without doctor’s prescription. The problem in marketing department in this company do not have promotion media for offer the products to consumer, no online sell, and order only by phone. To solve the problem in marketing department is build up e-commerce system. E-commerce system use Unifed Modelling Languange (UML); Activity Diagram, Use Case Diagram, Sequence Diagram, and Class Diagram. User Centered Design (UCD) as design method. Program language for e-commerce system is PHP and MySQL for database. The result of research is a e-commerce system website base to help search information product, company could get report easier, consumer can do purchase by online everywhere and everytime.

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