Design and Damping Force Analysis for Turbine Composite Regenerative Damper

2012 ◽  
Vol 446-449 ◽  
pp. 1360-1365
Author(s):  
Yong Qiang Gao ◽  
Jin Qiu Zhang ◽  
Jie Yue ◽  
Zhi Zhao Peng
Keyword(s):  
Basic Principle ◽  
Electromotive Force ◽  
Load Resistance ◽  
Force Analysis ◽  
Damping Force ◽  
Piston Velocity ◽  
Axial Turbine ◽  
New Type ◽  
The Relationship

Turbine composite regenerative damper is one of new type damper which can regenerate the energy of vibration. The component and principle of generator and regenerate energy for turbine composite regenerative damper is introduce, and based on hydrodynamics and axial turbine basic principle, the relationship between induced electromotive force and piston velocity ,load resistance is induced. At last, the relationship between damping force and piston velocity, load resistance is induced too. The method is meaningful to understand and instruct the design of turbine composite regenerative damper.

Estimation for Variation of the Damping Force Induced by the Expansive Movement of Shock Absorber

2013 ◽  
Vol 694-697 ◽  
pp. 312-315
Author(s):  
Gi Man Kim ◽  
Seong Ho Yun ◽  
Seong Dae Choi
Keyword(s):  
Empirical Data ◽  
Shock Absorber ◽  
Coil Spring ◽  
Damping Force ◽  
Piston Velocity ◽  
Physical Information ◽  
Force Variation ◽  
Piston Valve ◽  
The Relationship ◽  
Manufacturing Time

In this paper, the damping force loci of a twin tube shock absorber were estimated by using the empirical data. The variation of the damping force was investigated for movements of piston such as the expansion. The relationship between the piston velocity and the damping force were estimated by using the empirical data of four different conditions of coil spring turns. Also the relationship between the coil spring turns and the damping force were estimated by using the empirical data of four different piston velocities. Based on the experiment results, the estimated damping force variation functions provide the physical information of the components of the main piston valve system to save the manufacturing time and cost for the shock absorber

scholarly journals Sodium Metasilicate Cemented Analogue Material and Its Mechanical Properties

2016 ◽  
Vol 2016 ◽  
pp. 1-17 ◽  
Author(s):  
Songlin Yue ◽  
Yanyu Qiu ◽  
Pengxian Fan ◽  
Pin Zhang ◽  
Ning Zhang
Keyword(s):  
Complex Geometry ◽  
Sodium Metasilicate ◽  
Raw Material ◽  
Fine Aggregate ◽  
Regression Equations ◽  
Deformation And Failure ◽  
Orthogonal Experiments ◽  
Low Modulus ◽  
New Type ◽  
The Relationship

Analogue material with appropriate properties is of great importance to the reliability of geomechanical model test, which is one of the mostly used approaches in field of geotechnical research. In this paper, a new type of analogue material is developed, which is composed of coarse aggregate (quartz sand and/or barite sand), fine aggregate (barite powder), and cementitious material (anhydrous sodium silicate). The components of each raw material are the key influencing factors, which significantly affect the physical and mechanical parameters of analogue materials. In order to establish the relationship between parameters and factors, the material properties including density, Young’s modulus, uniaxial compressive strength, and tensile strength were investigated by a series of orthogonal experiments with hundreds of samples. By orthogonal regression analysis, the regression equations of each parameter were obtained based on experimental data, which can predict the properties of the developed analogue materials according to proportions. The experiments and applications indicate that sodium metasilicate cemented analogue material is a type of low-strength and low-modulus material with designable density, which is insensitive to humidity and temperature and satisfies mechanical scaling criteria for weak rock or soft geological materials. Moreover, the developed material can be easily cast into structures with complex geometry shapes and simulate the deformation and failure processes of prototype rocks.

Thermodynamic Performance of an Actual Thermo-Acoustic Refrigeration Micro-Cycle

2012 ◽  
Vol 614-615 ◽  
pp. 64-68
Author(s):  
Tuo Wang ◽  
Feng Wu ◽  
Jin Hua Fei ◽  
Ming Fang Liu
Keyword(s):  
Coefficient Of Performance ◽  
Pressure Amplitude ◽  
Cooling Load ◽  
Acoustic Effect ◽  
Thermodynamic Performance ◽  
Monotonically Increasing Function ◽  
Analytic Expressions ◽  
New Type ◽  
The Relationship ◽  
Increasing Function

Thermo-acoustic refrigerator is a new type of engine, which is based on the thermo-acoustic effect. A new model which expresses as an ellipse in pressure-volume diagram is established to investigate the thermodynamic performance of an actual thermo-acoustic refrigeration micro-cycle. The demarcation points of endothermic processes and exothermic processes in the actual micro-cycle are found. The analytic expressions of the dimensionless cooling load and the coefficient of performance (COP) are deduced. The relationship between the dimensionless cooling load and the COP are investigated by numerical examples. The results show that the dimensionless cooling load is a monotonically increasing function of the COP and the pressure amplitude.

scholarly journals Motives of volunteering and values of work among higher education students

2017 ◽  
Vol 16 (2) ◽  
pp. 117-131 ◽  
Author(s):  
Veronika Bocsi ◽  
Hajnalka Fényes ◽  
Valéria Markos
Keyword(s):  
Higher Education ◽  
Eastern Europe ◽  
Work Values ◽  
Border Region ◽  
Voluntary Work ◽  
Central Eastern Europe ◽  
New Type ◽  
Central Eastern ◽  
Definition Of ◽  
The Relationship

In this article, the motives for voluntary work and work values in higher education contexts are examined in a cross-border region in Central Eastern Europe. Our goal is to find out what kind of relationship exists between different types of volunteering and work values among young people. In the theoretical section, we deal with the definition of volunteering in the education system, the types of and motives for students’ volunteering, and finally, the relationship between the work values and voluntary work of students. In the empirical section, we created cluster groups based on students’ motives for volunteering, and we examined differences among countries. Then we revealed the factor structure of the work values of students and analyzed the relationship between cluster groups and factors with variance analysis. Five cluster groups were identified: “careerists with postmodern features,” “unmotivated,” “highly motivated,” “volunteers in an anti-volunteering climate,” and a “helping new type volunteers” group. There were only slight differences among countries, as most respondents are characterized by mixed motivations. An interesting result is that the most frequent group is “the volunteers in an anti-volunteering climate” in all the countries examined, especially in Ukraine, so the culture of volunteering is not popular enough in this region of Central Eastern Europe. Regarding the relationship between work values and volunteering, we have found that these two fields (work values and volunteering) are closely related.

Dynamic Motion Analysis of Plane Mechanisms With Coulomb and Viscous Damping via the Joint Force Analysis

1975 ◽  
Vol 97 (2) ◽  
pp. 551-560 ◽  
Author(s):  
Cemil Bagci
Keyword(s):  
Dynamic Equilibrium ◽  
Viscous Damping ◽  
Force Analysis ◽  
Initial Value ◽  
Damping Force ◽  
Joint Force ◽  
Coulomb Damping ◽  
Dynamic Motion ◽  
Joint Forces ◽  
Input Torque

Analysis of response of determinate plane mechanisms to known driving input force, or input torque, via the joint force analysis is presented. Coulomb damping and viscous damping forces in the pair bearings are included. Equations of dynamic equilibrium are solved for the components of the normal joint forces and for the motion of the mechanism as initial-value problems. The rotation of the resultant joint force, due to the fact that the pair member on a link is the inner member or the outer member of the pair, is considered by defining a generalized Coulomb damping force. Links of the mechanisms are considered rigid. The plane 4R and slider-crank switch mechanisms are investigated. Explicit solutions and numerical examples are given.

scholarly journals Groźba popełnienia przestępstwa o charakterze terrorystycznym w ujęciu art. 115 § 20 k.k. – wybrane problemy wykładni

2019 ◽  
Vol 28 (3) ◽  
pp. 41
Author(s):  
Aneta Michalska-Warias
Keyword(s):  
Criminal Law ◽  
Criminal Code ◽  
Eu Law ◽  
Terrorist Threat ◽  
Special Part ◽  
New Type ◽  
The Relationship

<p>The paper discusses the concept of a terrorist threat in the light of Article 115 § 20 of the Polish Criminal Code. The author stresses the relationship between this term and the punishable threat described in the special part of the Criminal Code. The conducted analysis leads to the conclusion that the terrorist threat must be treated as a special type of the punishable threat and, as a result, many real terrorist threats may not meet the criteria of a forbidden act, e.g. because of the lack of an individualised victim. As a result, there appear serious doubts as to whether Polish criminal law meets the requirements of EU law referring to the criminalisation of terrorist threats and, therefore, the introduction of a new type of offence of a terrorist threat and some changes in Article 115 § 20 and Article 115 § 12 of the Criminal Code have been proposed.</p>

scholarly journals On t-Neighbourhoods in Trigonometric Topological Spaces

2021 ◽  
Vol 12 (1S) ◽  
pp. 655-658
Author(s):  
S. Malathi, Et. al.
Keyword(s):  
Necessary Condition ◽  
Topological Spaces ◽  
Basic Properties ◽  
New Type ◽  
The Relationship

In this paper we introduce a new type of neighbourhoods, namely, t-neighbourhoods in trigonometric topological spaces and study their basic properties. Also, we discuss the relationship between neighbourhoods and t-neighbourhoods. Further, we give the necessary condition for t-neighbourhoods in trigonometric topological spaces.  .

scholarly journals Language in social reproduction: Sociolinguistics and sociosemiotics

2009 ◽  
Vol 37 (1/2) ◽  
pp. 43-81
Author(s):  
Patrizia Calefato
Keyword(s):  
Social Reproduction ◽  
Social Dimension ◽  
The Social ◽  
The Sixties ◽  
Roman Jakobson ◽  
New Type ◽  
General Linguistics ◽  
Definition Of ◽  
The Relationship

This paper focuses on the semiotic foundations of sociolinguistics. Starting from the definition of “sociolinguistics” given by the philosopher Adam Schaff, the paper examines in particular the notion of “critical sociolinguistics” as theorized by the Italian semiotician Ferruccio Rossi-Landi. The basis of the social dimension of language are to be found in what Rossi-Landi calls “social reproduction” which regards both verbal and non-verbal signs. Saussure’s notion of langue can be considered in this way, with reference not only to his Course of General Linguistics, but also to his Harvard Manuscripts.The paper goes on trying also to understand Roland Barthes’s provocative definition of semiology as a part of linguistics (and not vice-versa) as well as developing the notion of communication-production in this perspective. Some articles of Roman Jakobson of the sixties allow us to reflect in a manner which we now call “socio-semiotic” on the processes of transformation of the “organic” signs into signs of a new type, which articulate the relationship between organic and instrumental. In this sense, socio-linguistics is intended as being sociosemiotics, without prejudice to the fact that the reference area must be human, since semiotics also has the prerogative of referring to the world of non-human vital signs.Socio-linguistics as socio-semiotics assumes the role of a “frontier” science, in the dual sense that it is not only on the border between science of language and the anthropological and social sciences, but also that it can be constructed in a movement of continual “crossing frontiers” and of “contamination” between languages and disciplinary environments.

scholarly journals Waste Management in Bronze Age Europe

2017 ◽  
Vol 10 (1) ◽  
pp. 35-43
Author(s):  
Filip Havlíček ◽  
Martin Kuča
Keyword(s):  
Waste Management ◽  
Bronze Age ◽  
Management Strategies ◽  
Waste Material ◽  
Social Activities ◽  
Stone Age ◽  
New Type ◽  
The Relationship ◽  
The Bronze Age

AbstractThis article deals with the relationship between humans and waste in the Bronze Age. Based on selected examples of waste management strategies from the European Bronze Age, it presents an overview of different strategies. In comparison with the preceding Stone Age, a new type of material began to appear: metal. The process involved in producing metal objects, however, brought with it the appearance of a specific type of waste material that is indelibly linked to the production of metal. This article also deals with the significance of ritualized social activities in the Bronze Age, which materialized in waste and waste management strategies.

scholarly journals [Student Acceptance of Course Curriculum Implementation of Islamic Basic Principles (Ctu 101) at Uitm] Penerimaan Pelajar Terhadap Pelaksanaan Kurikulum Kursus Prinsip-Prinsip Asas Islam (Ctu 101) di Uitm

2015 ◽  
Vol 9 ◽  
pp. 20-33
Author(s):  
Rubiah Abu Bakar ◽  
Abdul Manam Mohamad
Keyword(s):  
Pilot Study ◽  
Basic Principle ◽  
Curriculum Implementation ◽  
Study Data ◽  
Descriptive Statistics ◽  
Survey Study ◽  
Basic Principles ◽  
Significant Relationships ◽  
Institute Of Technology ◽  
The Relationship

This study aims to analyze the acceptance of students towards the implementation of the Basic Principles of Islam (CTU 101) course curriculum which is one of the Islamic Study Courses in UiTM (MARA Institute of Technology). The focus of this study is to investigate the level and relationship between students’ acceptance in terms of content, teaching and evaluation. This survey study involved 300 students who were randomly chosen and a set of questionnaires was utilized as the instrument of study. A pilot study was conducted among 30 students to determine the reliability of instrument used by using Alpha Cronbach with value 0.960, and value 0.964. A set of questionnaire consists of part A (demography background of participants) and part B, C, D and E (questions of variables) was used to collect data for this study. Data were analyzed by using Software SPSS version 17.0 (Statistic Packages For Sosial Science) and reported by using of descriptive statistics of min, percentage and median, and also by making inferences to analyzed the relationship among the variables. The findings of study show that participants positively accepted CTU 101 course with content min average of content 4.1733 (high), teaching 4.0693 (high) and evaluation 3.9996 (high). Besides that, correlation Pearson analysis was used to analyzed the relationship among the variables and for this study, it was found that significant relationship between the acceptance of participants with the content, teaching and evaluation aspect of CTU 101 course.  The high score of each aspect or variable and the significant relationships show that students positively accepted the course. However, a few aspects of the course should be given attention and a few improvements should be done in order to give students good perception towards Islamic Study Course.   Keyword: Acceptance, student, Basic Principle of Islam (CTU 101).

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