Determination of the compressor optimal working conditions

2009 ◽  
Vol 29 (10) ◽  
pp. 1991-1997 ◽  
Author(s):  
C. Aprea ◽  
R. Mastrullo ◽  
C. Renno
Keyword(s):  
Working Conditions

The New Methodology of Working Load Classification in Engineering Operations

2013 ◽  
Vol 664 ◽  
pp. 1186-1190
Author(s):  
Maria Kapustova
Keyword(s):  
Mathematical Model ◽  
Working Conditions ◽  
Human Body ◽  
Complex Loading ◽  
Summary Effect ◽  
Moment Load ◽  
Forging Press ◽  
Negative Factors

Working conditions in engineering operations are often characterized by a complex of negative factors, which at every moment load the human body during the active work with various intensity. Determination of the intensity of the workload is important for creation of workplace comfort, which is closely connected to workers’ contentment. The contribution presents a description and application of a mathematical model for determination of the workers´ complex loading at forging press workplace. It's a new and human way of evaluating work comfort, which can take into account the summary effect of all the negative factors at the workplace.

Schwedische Wohlfahrtsforschung / Swedish research on social welfare

1976 ◽  
Vol 5 (4) ◽  
Author(s):  
Erik Gurgsdies
Keyword(s):  
Social Welfare ◽  
Working Conditions ◽  
Low Income ◽  
Social Indicators ◽  
Starting Point ◽  
Level Of Living ◽  
Followup Studies

AbstractThis report attempts to give a survey of development and state of Swedish research on welfare. It concentrates on surveys conducted by the socalled Low Income Committee which can be considered as the starting point of research on welfare in Sweden.After a short chronological presentation of the works of the Low Income Committee as well as some followup studies the underlying welfare concept will be discussed. First, all problems are being discussed which are related to the decision to measure welfare by nine level of living components: health, nutrition, housing, childhood and family conditions, schooling, work and working conditions, economic ressources, political ressources, leisure. Second, the further determination of the welfare concept by constructing social indicators of empirical relevance is described. Finally, there is a survey of the most important publications about Swedish research on welfare.

Determination of the Milling Conditions of a Pump Casing Cover Using a Parametric Designed Fixture Device

2015 ◽  
Vol 809-810 ◽  
pp. 890-895
Author(s):  
Ionuţ Ghionea ◽  
Adrian Ghionea ◽  
Saša Ćuković ◽  
Nicolae Ionescu
Keyword(s):  
Working Conditions ◽  
Computer Aided Design ◽  
Fem Analysis ◽  
Milling Process ◽  
Milling Tool ◽  
Cutting Force Components ◽  
Force Components ◽  
Aided Design ◽  
Tool Diameter

This paper presents an applicative methodology of parametric computer aided design using the CATIA v5 software to model and assembly a modular fixture device. The device is then used in the orientation and clamping a part of type casing cover which has a face machined by milling. Having a constructive solution of the fixture device, the next step is to simulate a milling process through a FEM analysis to identify the working conditions: milling tool diameter, number of teeth, cutting forces, required power of the machine tool etc. Some parameters were chosen according to various tools manufacturers catalogues and the cutting force components were determined experimentally in laboratory conditions. The analysis results show that in the FEM simulated milling process, in all the fixture device parts, some tensions cause displacements that have an influence over the casing cover surface roughness.

PRELIMINARY EXPERIMENTAL RESEARCH OF TRIBOLOGICAL PROPERTIES OF BUS BRAKES FRICTION LININGS

Tribologia ◽  
2016 ◽  
Vol 268 (4) ◽  
pp. 167-176 ◽  
Author(s):  
M.S. MUZDYBAEV ◽  
A.S. MUZDYBAEVA ◽  
V.V. ROGOVSKIJ ◽  
D.M. MYRZABEKOVA ◽  
A.B. ELEMES ◽  
...  
Keyword(s):  
Working Conditions ◽  
Tribological Properties ◽  
Traffic Safety ◽  
Spare Parts ◽  
Practical Significance ◽  
Brake Discs ◽  
The Cost ◽  
Urban Conditions ◽  
Overall Reliability

Experience gained from the use of buses in urban conditions showed that the working conditions of friction elements of the braking system, ensuring traffic safety, are associated with high loads. This leads to the intensive wear and premature replacement of the worn friction components, which reduces the overall reliability of the brake system and road safety. On the other hand, the friction linings of brake mechanisms may act as abrasives that cause the wear of brake discs or drums. Their replacement during operation is associated with a significant increase in the cost of spare parts. Therefore, it is assumed that the determination of the tribological properties of the brake linings in the brake mechanisms, before their exploitation, will increase the efficiency and safety of the vehicles’ operation, which justifies the choice of the research subject matter for its real and practical significance. The paper presents the preliminary results of the research into the main elements of the brakes in a city bus on a test stand mapping the real working conditions. For the testing, brake shoes of different manufacturers were used. Their tribological characteristics, reasons for their wear, and operational recommendations were determined.

Modeling the Process of Animation Production

2013 ◽  
Vol 7 (4) ◽  
pp. 439-450
Author(s):  
Hisato Nakanishi ◽  
◽  
Naohiro Shichijo ◽  
Masao Sugi ◽  
Taiki Ogata ◽  
...  
Keyword(s):  
Working Conditions ◽  
Process Model ◽  
Work Hours ◽  
Scheduling Theory ◽  
Work Processes ◽  
Overtime Work ◽  
Operation Sequence ◽  
Behavioral Rules ◽  
The One

In this study, a work process model for animation production is developed. Interviews with animation studio workers and surveys of their working diaries and shot progress charts are conducted to create a framework for the work processes. The work hours necessary for each operation of the work project are expressed using a gamma function. Workers are classified into two categories, managers and animators, and their behavioral rules are modeled. To establish a rule for the determination of the operation sequence order for an animator to perform multiple work operations, four typical dispatching rules, often used in a scheduling theory, are selected, and the one that is closest to actual data is regarded as the rule that the animator actually follows. As a result of the analysis, it is found that the Earliest Due Date (EDD) and SLACK are closest to actual animators’ behavioral rules. Managers are also found to move the sub-deadline (a deadline of each operation) up about 30% earlier than the actual deadline. The knowledge we obtain is that, in order to realize better working conditions, animators should determine their operation sequence order by using SLACK, and managers should designate subdeadlines by keeping a balance between the prevention of deadline violation and the reduction of overtime work.

Determination of Suction Forces and Moment on Parallel Manoeuvring Vessels for a Future Control System

2011 ◽  
Vol 180 ◽  
pp. 281-287 ◽  
Author(s):  
Witold Gierusz ◽  
Anna Waszkiel
Keyword(s):  
Control System ◽  
Pressure Distribution ◽  
Working Conditions ◽  
Empirical Equations ◽  
Cfd Simulations ◽  
Passenger Car ◽  
Computer Based ◽  
Semi Empirical

Vessels moving on parallel courses on the border of two mediums interact together. Ship to ship interactions are caused by irregular pressure distribution around the hull. Higher velocity of the fluid between hulls causes formation of the decreased pressure amidships. This is the base of suction forces and moments generation. Analytical computations and computer based CFD simulations were carried out on the basis of 3DOF models of two training ships - VLCC and Passenger Car Ferry. The results of both methods are comparable. Therefore the analytical semi-empirical equations can be implemented in a future control system, which requires ship to ship interactions estimations to ensure proper working conditions.

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