scholarly journals Formulation of the modern indicator devices modelling problem

2021 ◽  
Vol 2056 (1) ◽  
pp. 012053
Author(s):  
E A Buzaeva ◽  
D A Evsevichev ◽  
O V Maksimova
Keyword(s):  
Mathematical Model ◽  
Structural Characteristics ◽  
Equivalent Circuits ◽  
Design Calculation ◽  
High Complexity ◽  
Modelling Problem

Abstract This work is dedicated to study of the structural characteristics and parameters in advanced electroluminescent structures. The important problems in this area are the high complexity and the slowness of the design calculation processes. The problem can be solved by developing a mathematical model of the system based on equivalent circuits. First step in developing a mathematical model is formulation.

scholarly journals Key Aspects of the Proper Formulation of the Model in Numerical Analysis of the Influence of Mining Exploitation on Buildings

2015 ◽  
Vol 36 (2) ◽  
pp. 17-28
Author(s):  
Lucyna Florkowska ◽  
Jan Walaszczyk
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Numerical Modelling ◽  
Underground Mining ◽  
Structural Characteristics ◽  
Number Of Factors ◽  
Proper Formulation ◽  
Key Aspects ◽  
The Impact ◽  
Complex Matter

Abstract Numerical modelling is an important tool used to analyse various aspects of the impact of underground mining on existing and planned buildings. The interaction between the building and the soil is a complex matter and in many cases a numerical simulation is the only way of making calculations which will take into consideration the co–existence of a number of factors which have a significant influence on the solution. The complexity of the matter also makes it a difficult task to elaborate a proper mathematical model – it requires both a thorough knowledge of geologic conditions of the subsoil and the structural characteristics of the building. This paper discusses the most important problems related to the construction of a mathematical model of a building-mining subsoil system. These problems have been collected on the basis of many years of experience the authors have in observing the surveying and tensometric deformations of the rock–mass and buildings as well as in mathematical and numerical modelling of the observed processes.

Design of a New Multi-Channel High-Low Pressure Micro-Ejection System

2011 ◽  
Vol 189-193 ◽  
pp. 4313-4317
Author(s):  
Wei Yang ◽  
Qiang Yin ◽  
Kun Wang Niu ◽  
Jiao Zhang ◽  
Wen Dong Zhang
Keyword(s):  
Mathematical Model ◽  
Numerical Analysis ◽  
Structural Design ◽  
Structural Characteristics ◽  
Low Pressure ◽  
Classical Trajectory ◽  
Design Methods ◽  
Analysis And Design ◽  
Bullet Velocity

According to the structural characteristics of the multi-channel high-low pressure micro-ejection system,this paper sets up mathematical model of the trajectory based on the classical trajectory theory,makes numerical analysis to prove the rationality of the structural design,tests the pressure and bullet velocity of the launching system.The results show that the analysis and design methods of the multi-channel high-low pressure micro-ejection system are reasonable and reliable.

Design and Simulation of Fully Mechanized Hydraulic Support

2014 ◽  
Vol 644-650 ◽  
pp. 199-202
Author(s):  
Pei Qin Wang ◽  
Zeng Shun Xu ◽  
Zuo Feng Sun ◽  
Hui Yuan Jiang
Keyword(s):  
Mechanical Properties ◽  
Mathematical Model ◽  
Mechanical Model ◽  
Simulation Analysis ◽  
Virtual Prototype ◽  
Dynamics Simulation ◽  
Prototype Model ◽  
Design Calculation ◽  
Hydraulic Support ◽  
Element Analysis

Based on theoretical calculation, virtual prototype technology and the method of finite element analysis, the fully mechanized hydraulic support is designed and simulated. Firstly, the four-link mechanism of hydraulic support mechanical model and mathematical model are established, the demission is confirmed by design calculation of structure. Secondly, through the establishment of rigid parameterized virtual prototype model of the system, dynamics simulation analysis and research is finished based on ADAMS on the mechanical properties. Finally, based on FEA, the modal calculation of key components is completed by using ANSYS.

Design Method of Self-Loading Device of the Side-Crane Used for Container

2012 ◽  
Vol 466-467 ◽  
pp. 951-955
Author(s):  
Jun Qing Zhan ◽  
Xiao Mei Feng ◽  
Li Shun Li ◽  
Xiang De Meng
Keyword(s):  
Mathematical Model ◽  
Structural Design ◽  
Design Method ◽  
The Self ◽  
Design Calculation ◽  
Force Analysis ◽  
Loading Device ◽  
Calculation Results ◽  
The Mathematical Model ◽  
Flat Ground

The self-loading device used for side-crane is put forward. Its structure is presented. Based on the force analysis when the side-crane works at flat ground, the mathematical model is established when the crane working at uneven ground. And the design calculation is performed. The self-loading device’s optimal design is accomplished. Based on the above calculation results, the self-loading prototype is manufactured. And the design method can be adopted to the similar equipment’s structural design.

Mathematical model of honing of gas-dynamic supports

2021 ◽  
Author(s):  
V.V. Nazarov ◽  
I.I. Danilov ◽  
N.G. Nazarov ◽  
D.D. Dmitriev ◽  
N.A. Vetrova
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Mass Production ◽  
Geometric Shape ◽  
Labor Intensity ◽  
High Complexity ◽  
Gas Dynamic ◽  
Modes Of Processing ◽  
Main Factors ◽  
Free Abrasive

The design of technological processes for the manufacture of gas-dynamic supports (GDO) of gyroscopes is traditionally based on the use of finishing operations with the use of free abrasive. This leads to a high complexity of manufacturing such devices and complicates mass production. Reducing the labor intensity is possible when the labor-intensive finishing operation with a more productive operation of honing the holes of the GDO is replacing. But such a replacement requires the development of high-precision technology, which implies mathematical modeling of the process of honing the holes of GDO gyroscopes made of ceramic CM-332. Objective – a mathematical model of the process of honing the holes of GDO gyroscopes made of ceramic CM-332 is developed, which allows for the known shape of the workpiece, the tool used and the technological modes to calculate the geometric shape of the processed hole, and the value of any error. A mathematical model of honing of precision holes of GDO gyroscopes is developed, which takes into account the main factors of the process, the characteristics of the tool and the technological modes of processing. The dependence of the accuracy of the geometric shape of the processed hole on the characteristics of the tool is determined. The use of the results of the study made it possible to reduce the labor intensity of finishing operations for processing GDO holes by 10-15 times in the conditions of mass production of gyroscopes.

scholarly journals Research on folding suspension of multi-constrained rover based on the variation and fusion of rods and pairs

2017 ◽  
Vol 14 (4) ◽  
pp. 172988141772733
Author(s):  
Fei Yang ◽  
Honghao Yue ◽  
Meng Li ◽  
Jianguo Tao ◽  
Zongquan Deng
Keyword(s):  
Mathematical Model ◽  
Graph Theory ◽  
Functional Diversity ◽  
Structural Characteristics ◽  
Engineering Application ◽  
Cost Ratio ◽  
Planetary Rovers ◽  
Limited Space ◽  
Space Launch ◽  
Efficiency Cost

Planetary rovers with folding functions can solve the contradiction between the limited space of the vehicle and the functional diversity of the rover and greatly improve the efficiency–cost ratio of space launch activities. In this article, the multi-constrained quadrilateral suspension is considered based on the practical requirements of planetary detection. Based on graph theory and metamorphic theory, the structural characteristics and movement patterns of the rover are analyzed, the configuration transforming process of adding or decreasing the number of rods and kinematic pairs during folding is studied, and the corresponding mathematical model is established. The suspension of the rover is divided into three basic units, and the folding study is performed around each unit. The folding set of each unit type is given, and a feasible folding set is selected for each type of unit according to their structural characteristics and constraint conditions. At the same time, 15-folding schemes for the rover are given, and the optimal scheme is determined. According to the final folding scheme of the rover, the principle prototype of the rover is developed, and the functional experiment of the folding and unfolding is performed. The experimental results verify the feasibility and rationality of the folding scheme, indicating that the developed detection vehicle has a large fold ratio, which can fully adapt to the limited space inside the rocket. The theoretical and technical results can provide technical support for the engineering application of subsequent rovers with folding.

Capillary Scanning of a Porous Matrix. Experimental Techniques and Processing of its Results

2019 ◽  
Vol 7 (4) ◽  
pp. 29-42
Author(s):  
А. Синцов ◽  
A. Sintsov ◽  
Владимир Девисилов ◽  
Vladimir Devisilov
Keyword(s):  
Mathematical Model ◽  
Porous Structure ◽  
Structural Characteristics ◽  
Experimental Methods ◽  
Porous Matrix ◽  
Experimental Setup ◽  
Porous Structures ◽  
Porous Sample ◽  
Starting Position

The article presents an analysis of the possibilities of the previously unused method for the experimental study of porous permeable materials and the determination of their structural characteristics. The purpose of the experiment is to determine the geometric parameters of the porous matrix, which integrates the characteristics of the porous material. An example of analytical scanning of a porous structure is considered. A review of existing experimental methods is given. A scheme of the experimental setup, methods for conducting a capillary experiment and processing the data obtained are proposed. As an example, a mathematical model of the experiment is used, illustrating the possible results of the study of a porous sample. It is shown how the results of experiments are transformed into a porous matrix and are interpreted as its capillary scanning. It is proved that this model of porous structure can be used as a starting position in the mathematical calculations of the processes occurring in porous structures.

Study on Mechanics Properties of Shifting Impact of Overrunning AMT

2012 ◽  
Vol 252 ◽  
pp. 134-139
Author(s):  
Jian Jun Hao ◽  
Shuai Shuai Ge ◽  
Xi Hong Zou ◽  
Xiao Hui Ding
Keyword(s):  
Mathematical Model ◽  
Computer Simulation ◽  
Dynamic Model ◽  
Structural Characteristics ◽  
Transmission System ◽  
Separation Process ◽  
Force Analysis ◽  
Long Time ◽  
Simulation Results ◽  
The Mathematical Model

Aiming at the problem of long time power interruption and clutch master-slave friction plates wore seriously which greatly shorten the life of clutch during shifting process of AMT, a overrunning AMT without separation process of clutch when shifting is designed. This paper has analyzed structural characteristics and shift principle of overrunning AMT. Through force analysis on the jointing process of roller overrunning clutch, the mathematical model and dynamic model of transmission system are established. Finally, the shifting impact of shifting process is analyzed based on computer simulation. The simulation results indicate that vehicle longitudinal degree of jerk meets the requirement of vehicle comfort.

Experiment and Simulation Study on Parameter Obtaining of Hydraulic Mount with Air Spring

2013 ◽  
Vol 710 ◽  
pp. 277-280
Author(s):  
Wen Ku Shi ◽  
Wei Yang ◽  
Suo Jun Hou ◽  
Guo Yu Feng
Keyword(s):  
Mathematical Model ◽  
Dynamic Characteristics ◽  
Structural Characteristics ◽  
Influence Factors ◽  
Air Spring ◽  
Specific Parameter ◽  
Working Principle ◽  
Engine Mount ◽  
Stiffness And Damping ◽  
Upper Chamber

Structural characteristics and working principle of hydraulic engine mount with air spring was described, and mathematical model was derived. As significant influence factors of dynamic characteristics of hydraulic engine mount, stiffness and damping of rubber main spring, bulk stiffness of the upper chamber and effective pump area of the main rubber and some other key parameters were obtained in experiments. Mathematical model of hydraulic mount was simulated to analyze the influence of specific parameter on dynamic characteristics of mount.

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