Vol 7, No 3 (2021)
- Year: 2021
- Articles: 5
- URL: https://dynvibro.ru/dynvibro/issue/view/537
Full Issue
Articles
ON THE FORMATION OF DYNAMIC PROPERTIES OF PNEUMATIC AND HYDROMECHANICAL SYSTEMS
Abstract
The article presents a brief analysis of the results of the work of the scientific school of the Academician of the Russian Academy of Sciences V.P. Shorin on the creation of methods and means for eliminating oscillations in pipeline chains of pneumatic and hydraulic systems. The principles of construction and possible structures of dampers for forced vibrations of the working medium, as well as criteria and methods for assessing the effectiveness of the dampers are stated. The possibility of using vibration dampers as correcting devices to ensure the stability of hydromechanical control systems and equalize the frequency characteristics of measuring pipeline circuits is shown.
6-12
USING MACHINE LEARNING METHODS TO PREDICT HYDRAULIC PUMP REMAINING USEFUL LIFE
Abstract
This article discusses a sampling algorithm for machine learning in order to capture the trend of the cumulative deterioration of the characteristics of a hydraulic pump (cumulative degradation), which affects the efficiency of its operation and manifests itself in the form of a drop in volumetric efficiency. To generate data, a simulation model of a typical station for the supply of working fluid in technological complexes, developed in the SimulationX program, is used. The transient processes of pressure change in the system are described, from the analysis of which a tendency of a decrease in the average component of the pressure signal is traced, which is used as a diagnostic feature - an indicator of the state of the system. An example is also considered that describes the possibility of assessing the residual life of the system based on data characterizing the past state of the system, and can be adapted when forming a more complex base, taking into account the use of artificial neural networks.
13-21
NUMERICAL STUDY OF PULSATION PRODUCTIVITY OF A LOW-FLOW GEAR PUMP
Abstract
This article is devoted to a numerical study of the pulsation perfor-mance of a gear pump in the Ansys CFX software package in 2D. The article presents numerical data of a prototype pump and an upgraded pump with the same specific performance. The distinctive features of the latter are a different number of teeth and a different width of the gear wheel, as well as the presence of discharge grooves.The results of calculations show the effectiveness of the proposed upgrades. Recommen-dations for the design of low-consumption pumps are offered.
22-29
METHODS AND MEANS OF MACHINERY VIBRATION PROTECTION BASED ON POROUS ELASTIC DAMPING MATERIALS
Abstract
The article analyses vibration protection solutions based on the development and wide usage of porous elastic damping isolators and applied for mechanical systems and aerospace engineering products. The paper includes case studies of the implementation of developed vibration protection methods and means. They are grounded on the general properties of structural damping systems, methods for modelling dynamic processes in products and approaches to controlling the structural dynamics under the vibration loading.
30-34
RESEARCH AND OPTIMIZATION OF THE MATHEMATICAL MODEL OF THE HYDRAULIC DRIVE
Abstract
The objective of this project is to develop a simulator based on a real 1D hydraulic slider. Once a suitable simulator based on a mathematical drive model has been prepared, you need to check the simulator output for different types of inputs. The next step is to use the same input in the current system and then compare the current outputs of the system and the simulator together.
35-37