scholarly journals MODELING THE CLASSIFICATION FEATURES OF FOREST RAKE

2021 ◽  
Vol 11 (3) ◽  
pp. 172-182
Author(s):  
Ol'ga Ternovskaya ◽  
Aleksey Platonov
Keyword(s):  
Mathematical Model ◽  
Significant Influence ◽  
Initial Boundary ◽  
Volume Of Distribution ◽  
Design Parameters ◽  
Main Design ◽  
Linear Infrastructure ◽  
Specialized Equipment ◽  
Objective Classification

Work on the collection and raking of chopped residues in the territories of linear infrastructure facilities is often carried out by specialized equipment in-stalled on tractors or multifunctional machines and called «Forest rakes», moreover, the specified equipment can be classified according to a number of characteristics. Taking into account the significant influence of the subjective component identified by the author, which has an impact on the direct assignment of classified forest rakes to one or another element of the corresponding classification series, the purpose of the study was to develop a mathematical model for the classification of technical means for collecting and raking up chopped residues. The author substantiated the initial boundary conditions and presented a mathematical model for the formation of a visualized volume of distribution of the main design parameters of a forest rake, the values of the criterion of the density of the distribution of teeth of the means of mechanization of removal of cut residues, as well as the criterion of the specific width of these technical means, examples of the classification distribution of forest rake models according to the specified criteria are given, the assumptions and explanations for the considered mathematical model are stated, which makes it possible to carry out an objective classification of the means of mechanization of collection and raking of chopped residues, formulated conclusions based on the results of the study conducted by the authors

scholarly journals Research Results on Influence of Hydraulic Hammer Design Parameters

2021 ◽  
Vol 346 ◽  
pp. 03081
Author(s):  
Irina Teterin ◽  
Igor Ugrumov ◽  
Ivan Teterin ◽  
Andrey Korneev
Keyword(s):  
Mathematical Model ◽  
Control Unit ◽  
Type Structure ◽  
Design Model ◽  
Theoretical Research ◽  
Design Parameters ◽  
Theoretical Studies ◽  
Main Design ◽  
Hydraulic Hammer ◽  
The Mathematical Model

The article presents the results of the theoretical research on the influence of the design parameters on the output characterictics of a hydraulic hammer. The hydraulic hammer under the study has a hydraulic percussive mechanism of a permanent pressure-type structure with a spool free control unit. A design model of a hydraulic percussive mechanism with a spool free control unit has been developed. The mathematical model of the hydraulic percussive mechanism of a permanent pressure-type structure with a spool free control unit is presented. The oscillogram resulting from the theoretical studies, which defines the operation of the hydraulic percussive mechanism, is presented. A range of the rational zones for selecting the main design parameters of the hydraulic percussive mechnism is obtained.

scholarly journals Simulation Tests of a Cow Milking Machine—Analysis of Design Parameters

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1358
Author(s):  
Ewa Golisz ◽  
Adam Kupczyk ◽  
Maria Majkowska ◽  
Jędrzej Trajer
Keyword(s):  
Mathematical Model ◽  
Simplified Model ◽  
Design Parameters ◽  
Degree Polynomial ◽  
Fourth Degree ◽  
Local Loss ◽  
Linear Drag ◽  
Milking Machine ◽  
Machine Analysis ◽  
The Impact

The objective of this paper was to create a mathematical model of vacuum drops in a form that enables the testing of the impact of design parameters of a milking cluster on the values of vacuum drops in the claw. Simulation tests of the milking cluster were conducted, with the use of a simplified model of vacuum drops in the form of a fourth-degree polynomial. Sensitivity analysis and a simulation of a model with a simplified structure of vacuum drops in the claw were carried out. As a result, the impact of the milking machine’s design parameters on the milking process could be analysed. The results showed that a change in the local loss and linear drag coefficient in the long milk duct will have a lower impact on vacuum drops if a smaller flux of inlet air, a higher head of the air/liquid mix, and a higher diameter of the long milk tube are used.

Research on cargo-loading optimization based on genetic and fuzzy integration

2021 ◽  
Vol 40 (4) ◽  
pp. 8493-8500
Author(s):  
Yanwei Du ◽  
Feng Chen ◽  
Xiaoyi Fan ◽  
Lei Zhang ◽  
Henggang Liang
Keyword(s):  
Genetic Algorithm ◽  
Mathematical Model ◽  
Three Dimensional ◽  
Distribution Center ◽  
Long Time ◽  
Low Efficiency ◽  
Decision Making Model ◽  
The Mathematical Model ◽  
Loading Scheme

With the increase of the number of loaded goods, the number of optional loading schemes will increase exponentially. It is a long time and low efficiency to determine the loading scheme with experience. Genetic algorithm is a search heuristic algorithm used to solve optimization in the field of computer science artificial intelligence. Genetic algorithm can effectively select the optimal loading scheme but unable to utilize weight and volume capacity of cargo and truck. In this paper, we propose hybrid Genetic and fuzzy logic based cargo-loading decision making model that focus on achieving maximum profit with maximum utilization of weight and volume capacity of cargo and truck. In this paper, first of all, the components of the problem of goods stowage in the distribution center are analyzed systematically, which lays the foundation for the reasonable classification of the problem of goods stowage and the establishment of the mathematical model of the problem of goods stowage. Secondly, the paper abstracts and defines the problem of goods loading in distribution center, establishes the mathematical model for the optimization of single car three-dimensional goods loading, and designs the genetic algorithm for solving the model. Finally, Matlab is used to solve the optimization model of cargo loading, and the good performance of the algorithm is verified by an example. From the performance evaluation analysis, proposed the hybrid system achieve better outcomes than the standard SA model, GA method, and TS strategy.

Face Gear Width Prediction Using the DOE Method

2008 ◽  
Vol 130 (10) ◽  
Author(s):  
Michèle Guingand ◽  
Didier Remond ◽  
Jean-Pierre de Vaujany
Keyword(s):  
Regression Model ◽  
Simple Formula ◽  
Design Parameters ◽  
Face Gear ◽  
Main Design ◽  
Gear Design ◽  
Simple Regression Model ◽  
Numerical Tool ◽  
Influential Parameters ◽  
Simple Regression

This paper deals with face gear design. The goal is to propose a simple formula for predicting the width of the wheel as a function of the main design parameters. A specific software was used to achieve this goal. This numerical tool is able to simulate the geometry and the quasistatic loaded behavior of a face gear. The statistical method used for analyzing the influence of data is described: The design of experiments leads to a simple regression model taking into account the influential parameters and their couplings. In the last part of this paper, the results of the formulas are compared to those of the software and an optimal design is proposed based on the regression model.

Predictions of oil/chemical tanker main design parameters using computational intelligence techniques

2011 ◽  
Vol 11 (2) ◽  
pp. 2356-2366 ◽  
Author(s):  
S. Ekinci ◽  
U.B. Celebi ◽  
M. Bal ◽  
M.F. Amasyali ◽  
U.K. Boyaci
Keyword(s):  
Computational Intelligence ◽  
Design Parameters ◽  
Main Design

Mathematical Model Establishment and Analysis on the Pipe Deformation under External Pressure with the Ovality

2013 ◽  
Vol 760-762 ◽  
pp. 2263-2266
Author(s):  
Kang Yong ◽  
Wei Chen
Keyword(s):  
Mathematical Model ◽  
Theoretical Analysis ◽  
Yield Strength ◽  
Residual Stresses ◽  
Numerical Simulations ◽  
Significant Influence ◽  
External Pressure ◽  
Pipe Diameter ◽  
Axial Loads ◽  
The Stability

Beside the residual stresses and axial loads, other factors of pipe like ovality, moment could also bring a significant influence on pipe deformation under external pressure. The Standard of API-5C3 has discussed the influences of deformation caused by yield strength of pipe, pipe diameter and pipe thickness, but the factor of ovality degree is not included. Experiments and numerical simulations show that with the increasing of pipe ovality degree, the anti-deformation capability under external pressure will become lower, and ovality affecting the stability of pipe shape under external pressure is significant. So it could be a path to find out the mechanics relationship between ovality and pipe deformation under external pressure by the methods of numerical simulations and theoretical analysis.

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