VIBRATION-ISOLATING BALL-TYPE CLUTCH AS A SOURCE OF INCREASED VIBRATION ACTIVITY IN THE SYSTEM: AMORTIZED MECHANISM – SHAFT LINE

Akustika ◽  
2021 ◽  
pp. 177
Author(s):  
Irina Kudryavtseva ◽  
Sergey A. Rykov ◽  
Sergey V. Rykov
Keyword(s):  
Experimental Data ◽  
Experimental Studies ◽  
Wide Frequency Range ◽  
Test Stand ◽  
Frequency Range ◽  
Diagnostic Features ◽  
Shaft Line

The results of experimental studies of vibration activity of a vibration-insulating ball-type clutch installed on a shaft line are presented. These studies were made on the test stand. It is shown that, depending on the value of the shaft line fracture, the vibration activity of the ball-type clutch can increase in a wide frequency range up to 30 dB. The diagnostic features of the ball-type clutch which allow estimating its vibration activity have been identified on the basis of the analysis of experimental data.

scholarly journals STUDY OF PROCESSES OF PRESSURE AND IMPULSE FREQUENCY INFLUENCE ON PENETRATION OF LIQUIDS IN THE SAND SAMPLES

2016 ◽  
pp. 120-125
Author(s):  
M. Ya. Habibullin ◽  
R. R. Shangareyev
Keyword(s):  
Experimental Data ◽  
Oil Recovery ◽  
Pressure Fluctuations ◽  
Experimental Studies ◽  
Regression Equations ◽  
Linear Variation ◽  
Frequency Range ◽  
Impulse Frequency ◽  
Overburden Pressure

The article deals with the issues related to the hydrocarbon reservoirs oil recovery enhancement. It describes the bench laboratory experimental studies. The results obtained during determination of fluid leakage through the rock samples and the amount of absorption of pressure fluctuations at various regime parameters are presented. Using the experimental data the regression analysis was performed on the basis of which the qualitative correlations between factorial and resultant features were identified. Using the regression equations the graphic relations were constructed. It was found that with increasing the oscillation frequency of the fluid the amount of fluid passing through the sample of porous medium increased, with the highest value of q reached at the frequency range of 600 ... 1000 Hz. With increase in the oscillations penetration depth the absorption of the amplitude of the pressure fluctuations corresponds to the linear decrease, and with the overburden pressure increase the linear variation of absorption is distorted.

scholarly journals THE INVESTIGATION OF VIBRO-ISOLATING FEATURES OF TRANSMISSIONS OF VEHICLES IN ELASTIC CENTRIFUGAL COUPLINGS USING THE METHOD OF IDENTIFICATION OF DYNAMIC PROCESSES IN HALF-COUPLINGS ON THE UNIVERSAL DYNAMIC TEST STAND

Transport ◽  
2002 ◽  
Vol 17 (3) ◽  
pp. 77-84
Author(s):  
Bronislovas Spruogis ◽  
Leonas Zubavičius
Keyword(s):  
Dynamic Characteristics ◽  
High Speed ◽  
Dynamic Test ◽  
Power Saving ◽  
Wide Frequency Range ◽  
Test Stand ◽  
Dynamic Processes ◽  
Frequency Range ◽  
Rotor Systems ◽  
Resonance Frequencies

The presented paper describes the investigation of vibro-isolating features of transmissions of vehicles using universal dynamic test stand. The stand is protected by copyright and distinguishes itself for many advantages in comparison with the existing stands: it is contactless, precise in a wide frequency range, power-saving, high-speed. Due to low exploitation expenses and wide possibilities it is fit for the investigation of dynamic characteristics of various vehicles. On the said stand using the method of the identification of experiment dynamic processes, the investigation of vibroisolating features of rotor systems has been performed. The errors caused by the unevenness of rotation of connecting shafts, the adequacy of the calculated models and the dangerous resonance frequencies have been determined.

scholarly journals The Characteristic of Sound Reflections from Curved Reflective Panels

2015 ◽  
Vol 39 (4) ◽  
pp. 549-558 ◽  
Author(s):  
Agata Szelag ◽  
Tadeusz Kamisiński ◽  
Mirosława Lewińska ◽  
Jarosław Rubacha ◽  
Adam Pilch
Keyword(s):  
Experimental Studies ◽  
Wide Frequency Range ◽  
Sound Frequency ◽  
Frequency Range ◽  
Reflection Characteristic ◽  
Upper Limit ◽  
Sound Reflection ◽  
Semicircular Elements

Abstract The paper presents the verification of a solution to the narrow sound frequency range problem of flat reflective panels. The analytical, numerical and experimental studies concerned flat panels, panels with curved edges and also semicircular elements. There were compared the characteristics of sound reflected from the studied elements in order to verify which panel will provide effective sound reflection and also scattering in the required band of higher frequencies, i.e. above the upper limit frequency. Based on the conducted analyzes, it was found that among some presented solutions to narrow sound frequency range problem, the array composed of panels with curved edges is the most preferred one. Nevertheless, its reflection characteristic does not meet all of the requirements, therefore, it is necessary to search for another solution of canopy which is effective over a wide frequency range.

On the Absorption Coefficient of Porous Corrugated Surfaces

2002 ◽  
Vol 124 (3) ◽  
pp. 329-333 ◽  
Author(s):  
Francisco Simo´n ◽  
Rosa M. Rodrı´guez ◽  
Jaime Pfretzschner
Keyword(s):  
Experimental Data ◽  
Reflection Coefficient ◽  
Absorption Coefficient ◽  
Porous Materials ◽  
Analytical Approximation ◽  
Wide Frequency Range ◽  
Frequency Range ◽  
Corrugated Surfaces ◽  
Theoretical Results

A classical way of improving acoustical absorption performances of porous materials is the use of corrugated surfaces; this use can obtain lower cut-off frequencies and also improve the overall absorption over a wide frequency range. An analytical approximation is presented for the calculus of the absorption on this kind of surfaces, where the thickness gradient is represented as a series of steps. Reflection coefficient of every step is obtained and will contribute to the net reflection coefficient. Theoretical results will be presented and shown to agree with experimental data.

Diagnostics of metal samples using the results of experimental and theoretical study of positively charged microparticles formed upon sample destruction

2018 ◽  
Vol 84 (10) ◽  
pp. 23-28
Author(s):  
D. A. Golentsov ◽  
A. G. Gulin ◽  
Vladimir A. Likhter ◽  
K. E. Ulybyshev
Keyword(s):  
Experimental Data ◽  
Early Stage ◽  
Experimental Studies ◽  
Material Model ◽  
Total Charge ◽  
Cross Sectional ◽  
Practical Applications ◽  
Mechanical And Electrical Properties ◽  
Order Of Magnitude ◽  
Using Data

Destruction of bodies is accompanied by formation of both large and microscopic fragments. Numerous experiments on the rupture of different samples show that those fragments carry a positive electric charge. his phenomenon is of interest from the viewpoint of its potential application to contactless diagnostics of the early stage of destruction of the elements in various technical devices. However, the lack of understanding the nature of this phenomenon restricts the possibility of its practical applications. Experimental studies were carried out using an apparatus that allowed direct measurements of the total charge of the microparticles formed upon sample rupture and determination of their size and quantity. The results of rupture tests of duralumin and electrical steel showed that the size of microparticles is several tens of microns, the particle charge per particle is on the order of 10–14 C, and their amount can be estimated as the ratio of the cross-sectional area of the sample at the point of discontinuity to the square of the microparticle size. A model of charge formation on the microparticles is developed proceeding from the experimental data and current concept of the electron gas in metals. The model makes it possible to determine the charge of the microparticle using data on the particle size and mechanical and electrical properties of the material. Model estimates of the total charge of particles show order-of-magnitude agreement with the experimental data.

Installation for testing electronic voltmeters over a wide frequency range

1976 ◽  
Vol 19 (10) ◽  
pp. 1525-1526
Author(s):  
A. M. Fedorov ◽  
V. V. Krestovskii ◽  
V. S. Kiselev ◽  
S. A. Razumovskii ◽  
V. A. Shcheglov
Keyword(s):  
Wide Frequency Range ◽  
Frequency Range

An investigation of effects of level density models and gamma ray strength functions on cross-section calculations for the production of 90Y, 153Sm, 169Er, 177Lu and 186Re therapeutic radioisotopes via (n,γ) reactions

2019 ◽  
Vol 108 (1) ◽  
pp. 11-17
Author(s):  
Mert Şekerci ◽  
Hasan Özdoğan ◽  
Abdullah Kaplan
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Production Cross Section ◽  
Gamma Ray ◽  
Production Cross ◽  
Level Density ◽  
Experimental Studies ◽  
Level Density Models ◽  
Strength Functions ◽  
Cancer Diseases

Abstract One of the methods used to treat different cancer diseases is the employment of therapeutic radioisotopes. Therefore, many clinical, theoretical and experimental studies are being carried out on those radioisotopes. In this study, the effects of level density models and gamma ray strength functions on the theoretical production cross-section calculations for the therapeutic radioisotopes 90Y, 153Sm, 169Er, 177Lu and 186Re in the (n,γ) route have been investigated. TALYS 1.9 code has been used by employing different level density models and gamma ray strength functions. The theoretically obtained data were compared with the experimental data taken from the literature. The results are presented graphically for better interpretation.

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