2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM)最新文献

{"title":"Development of a Methodology for Determining Natural Frequencies and Conducting Accelerated Resonance Tests for the Reliability of Valve Springs of an Internal Combustion Engine","authors":"V. Biryuk, M. O. Zakharov, A. A. Gorshkalev, V. Larin","doi":"10.1109/DVM55487.2022.9930898","DOIUrl":"https://doi.org/10.1109/DVM55487.2022.9930898","url":null,"abstract":"Based on the available theoretical calculations and methods for determining natural frequencies, a method for determining the natural frequencies of valve springs of internal combustion engines was developed and tested. In the course of this work, the following results were obtained: a methodology for determining the natural frequencies of valve springs of an internal combustion engine was developed, an experimental study was conducted to determine the natural frequencies of an internal combustion engine, confirmation of the studies carried out by determining the natural frequencies of the object of research on a vibration stand.","PeriodicalId":227980,"journal":{"name":"2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133498771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fast Parametric Fourier Transform","authors":"Ponomarev Alexey, Ponomareva Olga, Smirnova Natalia","doi":"10.1109/DVM55487.2022.9930933","DOIUrl":"https://doi.org/10.1109/DVM55487.2022.9930933","url":null,"abstract":"The purpose of the study is to the develop new discrete Fourier transform, by generalizing the classical discrete Fourier transform (DFT) in the form of a parametric discrete Fourier transform (DFT-P) and the development of fast algorithms for implementing this type of transform - the fast parametric discrete Fourier transform (FFT-P). The classical Fourier processing of complex vibroacoustic finite discrete signals (VFD signals), based on DFT and fast Fourier transform (FFT) algorithm, is the most powerful method of digital analysis, modeling, optimization, improvement of control and decision making in solving problems of machine dynamics and vibroacoustic. The theoretical basis of the classical Fourier processing of VFD signals is the discrete Fourier transform. The practical base of the classical Fourier processing of VFD signals is the fast Fourier transform algorithms. However, the practice of applying the classical Fourier processing of VFD signals of a complex structure containing both deterministic periodic and random signals, on the one hand, confirming the effectiveness of the classical Fourier processing, on the other hand revealed a number of negative effects inherent in this type of digital signal processing (DSP). The aliasing effect, the scalloping effect, the picket fence effect, significantly negatively affect the effectiveness of analysis, modeling, optimization, improvement of control and decision-making in the study. To improve the efficiency and effectiveness of the Fourier processing of VFD signals, authors of this work developed a generalization of the theoretical basis of the classical Fourier processing - DFT in the form of a parametric DFT (DFT-P). Since the direct application of the parametric Fourier processing of VFD signals (as well as the use of the classical Fourier processing of VFD signals) requires complex multiplications, fast procedures are needed for the practical implementation of this type of VFD signals. We have developed fast procedures for implementing DFT-P by time decimation. Parametric FFT (FFT-P) with replacement (in place) and without replacement (no place) are proposed. The estimation of the efficiency of FFT-P algorithms is given. The practical significance of the work lies in the fact that the developed algorithms for the parametric fast Fourier transform make it possible to reduce the computational costs for performing parametric discrete transformations by three or more orders of magnitude.","PeriodicalId":227980,"journal":{"name":"2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132714291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New Technical Solutions of Devices of Reduction of Vibration of Pipelines of Power Plants","authors":"A. Vasilyev","doi":"10.1109/DVM55487.2022.9930887","DOIUrl":"https://doi.org/10.1109/DVM55487.2022.9930887","url":null,"abstract":"Vibration of pipelines during the operation of different kinds of power plants is a serious problem. Main sources of generation of vibration of pipelines of power plants in industrial conditions are considered. Analysis of existing methods and devices of reduction of vibration of pipelines of power plants is carried out. Negative features of some existing devices of reduction of vibration of pipelines are considered. New technical solutions of devices of reduction of vibration of pipelines developed by the author are described. One of devices is containing cylindrical rubber dampers, adjusting clamps, adjusting clamping screw etc. Another device contains bellows compensator, perforated insert, elastic elements in the form of springs, microphones, vibration sensors, electronic controller etc. Suggested devices are having good efficiency of reduction of vibration of pipelines of power plants and may be used in different branches of industry.","PeriodicalId":227980,"journal":{"name":"2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114639599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Emergency Operation of the Flap in the Rocket Fuel Channel","authors":"Kluev N. I., P. A.","doi":"10.1109/DVM55487.2022.9930903","DOIUrl":"https://doi.org/10.1109/DVM55487.2022.9930903","url":null,"abstract":"- The paper presents a mathematical model of a water hammer in the vertical fuel channel of a rocket during an emergency operation of the flap. Fuel from the tank through a vertical cylindrical channel enters the combustion chamber of the rocket engine. The liquid flow rate is regulated by a throttle valve located at the outlet of the pipeline. The unsteady flow of liquid in the channel is considered when the valve is suddenly closed. The problem is described by one-dimensional unsteady equations of motion. A compressible fluid model is used. The solution of the problem was obtained by the Fourier method in the Mathcad application software package. The results of the numerical solution of the problem are presented.","PeriodicalId":227980,"journal":{"name":"2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114788773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research of Thrust Increase on the Ejector Turbojet Engine with the Afterburner","authors":"Khaliulin R.R., Sychenkov V.A., Stepicheva N.V.","doi":"10.1109/DVM55487.2022.9930931","DOIUrl":"https://doi.org/10.1109/DVM55487.2022.9930931","url":null,"abstract":"In this paper the using possibility of the scheme of an ejector turbojet engine with an afterburner (ETJEA) was carried out. The effectiveness of using of an ejector nozzle during a takeoff aircraft mode is determined. Experimental research of ETJEA were carried out on a unit with obtaining of engine thrust.","PeriodicalId":227980,"journal":{"name":"2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126270531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical Simulation of Hydraulic Screen Filter","authors":"S. Y. Konstantinov, D. Tselischev, V. Tselischev, D. Tuk","doi":"10.1109/DVM55487.2022.9930907","DOIUrl":"https://doi.org/10.1109/DVM55487.2022.9930907","url":null,"abstract":"The aims of the research are to create a methodology for calculation of flow rate characteristics and to determine the absolute and nominal filter rating of the screen filter in ANSYS CFX. The developed methodology of numerical flow simulation in screen filter consists of three stages: 1) numerical simulation of the liquid flow in the elementary volume of filter's mesh (micro level); 2) numerical simulation of the liquid flow in a single corrugation of the filter element; 3) numerical simulation of the fluid flow in the whole filter (macro level). Verification of the methodology was carried out with the results of experiments performed at the “Diagnostics and identification of hydraulic systems” stand in USATU and “Gidravlika”. The divergence between the results of numerical simulation and the experiment in terms of the flow-drop characteristic does not exceed 2%. This allows using this methodology for design of new filters constructions.","PeriodicalId":227980,"journal":{"name":"2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127223985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental Study Of The Efficiency Of Damping Resonant Oscillations In A Liquid By Adding Gas","authors":"Zaripov F.A., Pavlov G.I, Sitnikov O.R.","doi":"10.1109/DVM55487.2022.9930923","DOIUrl":"https://doi.org/10.1109/DVM55487.2022.9930923","url":null,"abstract":"Standing waves can form in the hydraulic systems of various devices. When the frequency of the input energy approaches the natural frequency of the hydraulic path, resonant oscillations occur. Such fluctuations can adversely affect the operation of hydraulic systems. The search for effective methods for damping resonant vibrations that occur in hydraulic systems is an urgent task of scientific research. The authors proposed a method for damping resonant oscillations in a liquid by supplying gas to an acoustic circuit. The article presents the results of an experimental determination of the efficiency of damping resonant vibrations in a pipe by adding different gases under different modes of fluid motion. The results of theoretical calculations are well confirmed by experimental data.","PeriodicalId":227980,"journal":{"name":"2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM)","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116024015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research of the Mechanical Characteristics of a Magnetically Active Elastomer for Use as Part of a Vibration Isolation System in Vacuum","authors":"D. Ivanova, A. Bazinenkov, V. S. Shcherbakova, Valery P. Mikhailov","doi":"10.1109/DVM55487.2022.9930909","DOIUrl":"https://doi.org/10.1109/DVM55487.2022.9930909","url":null,"abstract":"Magnetoactive elastomer (MAE) is a polymeric material used in vibration control devices and shock absorbers. MAE belongs to the class of “smart materials”. Its rheological properties are controlled by an external magnetic field. The purpose of this work is to research the mechanical properties of different MAE compositions. The objectives of the research are to study the agent components in the MAE composition, to produce samples with different percentages of components, to investigate the elasticity modulus in tension and compression, to investigate the outgassing of the material. The obtained experimental research data indicate the effect of the applied carbonyl iron powder coating on MAE mechanical properties. Samples with poly-para-xylylene coating on carbonyl iron particles have lower stiffness coefficients and lower elasticity modulus. This composition had the greatest effect on properties of samples with a filler particle concentration of 30%. The elasticity modulus of a sample with a thin coating layer is two times less than the one of a sample with pure iron particles. The preliminary vacuum research of MAE, aimed at determination of the order of gas evolution flow, showed a significant amount of gases, mainly included in the atmospheric air gases. In the future, it is planned to test the vacuum characteristics of the MAE with a long pumping time and high temperature heating and mechanical tests in vacuum.","PeriodicalId":227980,"journal":{"name":"2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM)","volume":"178 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123838034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Applying Adaptation Methods in Expert Diagnostic Rules for Industrial Equipment - Real Experience","authors":"I. Nekrasov, Nikolay Kukin","doi":"10.1109/DVM55487.2022.9930915","DOIUrl":"https://doi.org/10.1109/DVM55487.2022.9930915","url":null,"abstract":"Predictive diagnostics became a mature independent scientific trend during last several decades. The main idea of this methodology is to create a degradation model of a technical asset that can be utilized for prognosing its abnormal behavior and failures in advance. Historically this scientific sphere inherited two main approaches in creating the model itself. First approach grounds on traditional understanding of a mathematical model as an analytical summarization of fundamental laws of nature. From technical perspective this can be substituted by expert knowledge of experienced engineer which can be formalized as a formula dependent on certain measured parameters. The other direction, on the contrary, bases on ‘pure’ mathematical approximation of observed equipment behavior. Both approaches have their pros and cons in certain circumstances that are in details described in this paper. In our research we show one simple method of bringing advantages of both approaches into one common diagnostic algorithm. As a reference example we use a real pump which online parameters are stored in real-time database of a SCADA system. We use historical trends for training the adaptation rules and test how the resulting algorithm is applied to failure detection problem.","PeriodicalId":227980,"journal":{"name":"2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM)","volume":"82 8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131137752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of AMB Test Unit for the Numerical Model Validation","authors":"R. Badykov, A. Lomachev, M. Benedyuk, K. Bezborodova, A. Yurtaev","doi":"10.1109/DVM55487.2022.9930928","DOIUrl":"https://doi.org/10.1109/DVM55487.2022.9930928","url":null,"abstract":"The paper presents the results of the experimental testbed unit creation, its testing results, and the simulation results of a developed numerical model. The experimental testbed unit is an axial magnetic suspension of the rotor with two axial electromagnets. The main purpose of the testbed unit is to test the results of the developed numerical finite element model. The automatic control system was developed for the experimental testbed unit. The electrical circuit was assembled based on the ESP32 microcontroller with a clock rate of 240 MHz and PWM with a bit capacity of 10 bits. The PID-controller program was developed. The coefficients kP, kD, kI used in the code of the system control program (PID-controller) were tuned. An experimental study of the load bearing capacity of the axial active magnetic bearing under the influence of external axial force was conducted. The required power consumption of the axial active magnetic bearing was determined. The maximum load-bearing capacity of the testbed unit for the selected coefficients of the PID-controller was determined. An axisymmetric finite-element model of the axial active magnetic bearing was developed in the open-source program FEMM 4.2. The load-bearing capacity of the testbed unit for a given current intensity value was calculated. The results of the numerical modeling were compared with the experimental data obtained. The basic principles of creation and operation of the experimental testbed unit and its numerical model were described.","PeriodicalId":227980,"journal":{"name":"2022 International Conference on Dynamics and Vibroacoustics of Machines (DVM)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122617053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}