Maintenance Tools Category Integration Method Based on Case Analysis

2013 ◽  
Vol 446-447 ◽  
pp. 1647-1651
Author(s):  
Ya Bin Wang ◽  
Zhen Hua Fu ◽  
Yan Tian ◽  
Li Qing Rong
Keyword(s):  
Support System ◽  
Integration Method ◽  
Case Analysis ◽  
Difficult Problem ◽  
Analysis Method ◽  
Numerical Example ◽  
Integration Analysis

Maintenance tools present a difficult problem in complex support system, for the considerable varieties to be integrated and optimized. In order to obtain the solution, a maintenance tools category integration method was developed, which minimizes the support burden and costs. A maintenance tools category integration analysis method was employed based on case analysis method, which can classify the maintenance tools scientifically by its main characters. The integration flow and implement steps were employed, which can improve the solving efficiency for the integration method. At last, a numerical example was given, which examined the feasibility and validity of this method.

Implementing the National Psychological Support System through Case Analysis of Disaster Victims

2016 ◽  
Vol 12 (5) ◽  
pp. 39-49
Author(s):  
Ji Woong Hwang ◽  
◽  
Sang Jin Ahn ◽  
Seong Joon Byeon ◽  
◽  
...  
Keyword(s):  
Support System ◽  
Case Analysis ◽  
Psychological Support ◽  
Disaster Victims

Reliability Assessment for Small Sample Based on Interval Degradation Data

2011 ◽  
Vol 199-200 ◽  
pp. 534-537
Author(s):  
Wei Tao Zhao ◽  
Dong Lin Yao ◽  
Wei Ping Zhang
Keyword(s):  
Reliability Analysis ◽  
Reliability Assessment ◽  
Small Sample ◽  
Analysis Method ◽  
Numerical Example ◽  
Degradation Data ◽  
Analysis Theory ◽  
Interval Reliability ◽  
Improved Model ◽  
Assessment Results

Based on reliability analysis theory, traditional interval reliability analysis method is improved by take the smaller value of probability reliability and interval reliability as the results of reliability assessment, which makes the reliability assessment results more fit engineering cases. The improved model is applied to reliability assessment of small sample products with degradation characteristics, and results of assessment are compared with existing methods. A numerical example is considered, the results show that the assessment results by the method proposed in the paper is reasonable and believable.

Reliability Evaluation for Binary Directed Tree-Structured Systems Based on Terminal Failure Limit-Value

2011 ◽  
Vol 63-64 ◽  
pp. 268-272
Author(s):  
Wei Chen ◽  
Peng Liu
Keyword(s):  
Reliability Evaluation ◽  
Difficult Problem ◽  
Complex Structures ◽  
Effective Algorithm ◽  
Transitive Relation ◽  
Directed Tree ◽  
Numerical Example ◽  
Structured Systems ◽  
Limit Value ◽  
Set Operations

This paper evaluates reliability of binary directed tree-structured systems based on terminal failure limit-value. For the difficult problem with complex structures and directed transitive relation, the paper describes nodes in the tree system using set algebra, and uses set operations to compute a combinational mode of failed nodes, and then describes it with family of sets. On that basis, an effective algorithm is shown, and a numerical example is given to illustrate the algorithm obtained in the paper.

A Design Procedure for Evaluating the Tube Axial Load due to Thermal Effects in Multi-Pass Fixed Tubesheet Exchangers

1987 ◽  
Vol 109 (1) ◽  
pp. 27-32 ◽  
Author(s):  
K. P. Singh ◽  
A. I. Soler
Keyword(s):  
Thermal Expansion ◽  
Thermal Effects ◽  
Axial Load ◽  
Design Procedure ◽  
Length Change ◽  
Solution Procedure ◽  
Analysis Method ◽  
Rational Analysis ◽  
Numerical Example ◽  
Unequal Length

The unequal length change of the tubes in various tube passes of a multi-tube pass fixed or floating head tubular exchanger produces axial tube loads which may be substantial in some operating units. This paper provides a rational analysis method, heretofore unavailable to the design community, to quantify the effect of multi-pass thermal expansion on the tube axial load. A numerical example is used to illustrate the solution procedure.

Nonlinear Analysis Method Research of Multi-Bolt Connection Structure of Primary Equipment Support

2017 ◽  
Author(s):  
Jianrong Zou ◽  
Shaochong Zhou
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Steam Generator ◽  
Support System ◽  
Analysis Method ◽  
The Finite Element Method ◽  
Reactor Coolant ◽  
Asme Code ◽  
Bolt Connection ◽  
Coolant System

The main equipments of the reactor coolant system include the steam generator, the reactor coolant pump, the pressurizer and the reactor coolant loop. The reactor coolant system is equipped with a steam generator for each of the two loops, and pressurizer is connected with the hot leg of loop 1 using the surge line. The main loop support system design of AP series greatly simplifies the RCS loop support system. Pressurizer supports consist of columns, lower lateral supports, upper lateral support and ring girder, and the steam generator supports consist of columns, lower lateral supports, upper lateral supports and intermediate lateral supports. Ring Girder of pressurizer consists of two semi-circular girders, vertical supports and splice connection of girder and the two half-ring girders are connected with splice connection using 11 bolts. The steam generator upper lateral support is mainly composed of bracket, snubber, pin and ubar and the ubar and the steam generator is connected via 16 bolts in the initial design. These bolts are to ensure the support junction can withstand the force and torque of various conditions of the reactor coolant system, which are important components of the main equipment support. There are large numbers of bolts in the splice connection of ring girder and ubar of upper lateral support of steam generator, and the bolts load was calculated using the uniform method in the general engineering design and analysis. During the design review it was found that the bolts load was uneven and in order to determine the non-uniformity of the bolts the finite element method was used to calculate the load on each bolt, and the resulting stress ratio was greater than 1 did not meet the requirements of the ASME Code. In this paper, the calculation method was studied and the design improvements for parts was made using the nonlinear analysis method to meet the requirements of ASME Code in the case of master supports of main equipment supports have been made good. At the same time the impact of bolts load because of gap was studied. It had very good economic benefits. The calculation and research of this paper show that the finite element method can calculate the force of bolts finely, and can get a more reasonable result than the empirical formula. It can be referred to when the multi-bolt connection structure needs to be refined, such as flange connection of important equipments and valves and flange and bolt design optimization.

scholarly journals Connotation Analysis on Sustainable Development Strategy of Garment Enterprises — Case Study on the Famous Brand JNBY

2021 ◽  
Vol 237 ◽  
pp. 04006
Author(s):  
Yuqian Dai ◽  
Yan Cui ◽  
Xiaogang Liu
Keyword(s):  
Sustainable Development ◽  
Strategic Planning ◽  
Social Responsibility ◽  
Environmental Protection ◽  
Development Strategy ◽  
Case Analysis ◽  
Development Strategies ◽  
Analysis Method

Domestic original designer brand JYBY adheres to environmental protection and social responsibility actions, and integrates sustainable development into its strategic planning. This paper mainly USES case analysis method to analyse the composition and implementation measures of JNBY’s sustainable development strategy, so as to provide experience for other garment enterprises in China to formulate sustainable development strategies.

Calculating the Maximum Assembling on Nested Routing Platforms of Urban Rail Transit Line

2014 ◽  
Vol 2 (4) ◽  
pp. 372-384
Author(s):  
Yongliang Wang ◽  
Xingchen Zhang
Keyword(s):  
Trend Analysis ◽  
Influencing Factors ◽  
Change Process ◽  
Urban Rail Transit ◽  
Rail Transit ◽  
Analysis Method ◽  
Passenger Train ◽  
Numerical Example ◽  
Urban Rail

Abstract The maximum assembling for some period on nested routing platforms of urban rail transit line were calculated by trend analysis method. Based on influencing factors of maximum assembling on platform, relative hypotheses were given. Platforms were divided to eight types by relations between platform and routing train. Interaction of passenger, train and platform, assembling change process, and calculation frames of maximum assembling on different type platforms carried out to be maximum assembling were concluded by trend analysis method. The numerical example application revealed that trend analysis method to calculate maximum assembling on nested routing platforms is feasible, and the final results by trend analysis method are more accurate than by one of codes for design of metro.

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