scholarly journals Development of a method for designing specialized machinery based on a hinge tractor

2021 ◽  
pp. 32
Author(s):  
Оleg Shcherbak ◽  
Andrey Suminov ◽  
Sergey Khachaturian
Keyword(s):  
Mathematical Modeling ◽  
Design Feature ◽  
Road Construction ◽  
Public Utilities ◽  
Road Building ◽  
Critical Elements ◽  
Modern Computer ◽  
Modeling Systems ◽  
Limited Company ◽  
Modeling Data

The method of designing frames of special machines for road construction and public utilities is considered, which allows you to design special machines with a given level of reliability and durability. The technique allows using modern computer modeling systems to carry out constructive refinement of the base tractor frame using experimental and mathematical modeling data. Using the design feature of tractors of the T–150K family, namely the presence of an articulated joint, it is possible, using a modular principle, to quickly design various machines for various industries. However, in order to design reliable machines, one must have a methodology for designing such machines. There is currently no such technique. When designing special machines, designers perform calculations only for working equipment. But as practice shows, the critical elements of the machine in this case, the support of the vertical hinge of the tractor frame during the operation of the pressurized machine (wheeled bulldozer and front loader), experience shock loads that lead to the destruction of the frame of the base tractor. The purpose of the article is to develop a methodology for designing a complex of road–building machines on the basis of mass–produced tractors with an articulated frame produced by public limited company "KhTZ".

FEATURES OF FIXED AND CURRENT FUNDS REPRODUCTION IN ROAD CONSTRUCTION ENTERPRISE

2020 ◽  
Vol 2 (12) ◽  
pp. 26-31
Author(s):  
T. N. KOSTYUCHENKO ◽  
◽  
D. O. GRACHEVA ◽  
M. B. CHEREMNYKH ◽  
◽  
...  
Keyword(s):  
Road Construction ◽  
Building Industry ◽  
Construction Enterprise ◽  
Road Building ◽  
The Road ◽  
Material Resources ◽  
Building Enterprise ◽  
Practical Recommendations

The article outlines the aspects of the development of reproduction processes in the road-building industry, provides practical recommendations for their normalization, contributing to an increase in the efficiency of using fixed and circulating assets. The paper investigates and developed measures to rationalize the process of reproduction of material resources of a particular road-building enterprise, taking into account their impact on the value of the business.

Technological Features of the Liquid-Solid State of the Boundary Layer in the Processes of Bimetallic Products

2022 ◽  
Vol 1049 ◽  
pp. 53-61
Author(s):  
Valeriy Lykhoshva ◽  
Dmitry Glushkov ◽  
Elena Reintal ◽  
Valeriy V. Savin ◽  
Ludmila Alexeyevna Savina ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Experimental Data ◽  
Boundary Layer ◽  
Solid State ◽  
Liquid Phase ◽  
Contact Zone ◽  
Thermal Field ◽  
Thermal State ◽  
Existence Time ◽  
Modeling Data

The hydrodynamic and thermal state in the contact zone of the layers of a bimetallic product obtained by pouring liquid iron onto a solid steel billet, which changes in time and is responsible for the strength of the diffusion joint and the geometric parameters of the transition layer, has been investigated. Simplified analytical dependences, mathematical modeling data and experimental results of the liquid phase existence time in the contact zone based on research of the melt velocities during pouring and changes in the thermal field are presented. It is shown that simplified calculations data coincide in order and are close in values ​​to the calculations of mathematical modeling and experimental data, which makes it possible to use them for preliminary rough estimates by technologists and metallurgists.

Data Mining and Optimize TCM Prescription Compatibility Based on WDS-PLS

2014 ◽  
Vol 687-691 ◽  
pp. 1385-1388
Author(s):  
Zhuo Wang ◽  
Bin Nie ◽  
Ri Yue Yu
Keyword(s):  
Mathematical Modeling ◽  
Experimental Data ◽  
Data Mining ◽  
Regression Coefficient ◽  
Uniform Design ◽  
Herbal Medicines ◽  
Data Standardization ◽  
Modeling Data ◽  
Pls Method ◽  
Original Formula

Data mining and optimize traditional Chinese medicine (TCM) prescription compatibility based on wavelet denoise spectral and partial least squares (WDS-PLS). Method: First of all, experimental design: with reference to the original formula, the herbal medicines in a prescription designed nine formula based on mixing uniform design; Secondly, obtain experimental data and data standardization; Finally, mathematical modeling, data mining and optimize TCM prescription compatibility base on WDS-PLS.Results: gain the regression coefficient and equation, VIP sorting, loadings Bi plot, and seek out the optimized direction of the prescription. Conclusion: the method data mining and optimize the compatibility of the dachengqi decoction is feasible and effective.

Estimating the impacts of harvest distribution on road-building and snag abundance

2004 ◽  
Vol 34 (2) ◽  
pp. 323-331 ◽  
Author(s):  
S Craig DeLong ◽  
S Andrew Fall ◽  
Glenn D Sutherland
Keyword(s):  
Time Horizon ◽  
Patch Size ◽  
Ecological Impact ◽  
Road Construction ◽  
Landscape Dynamics ◽  
Worker Safety ◽  
Spatially Explicit ◽  
Access Management ◽  
Dynamics Model ◽  
Road Building

Various patterns of harvest in forests influence the length of road and number of stream crossings required. Snags are removed directly by harvesting, but they are also removed along road and opening edges to ensure worker safety. To assess the potential impacts of rate of harvest and pattern of harvest in an old-forest-dominated montane landscape, we developed a spatially explicit landscape dynamics model, which includes submodels for snag removal, harvesting activities, and access management. The model assesses the amount of new road construction and number of streams crossed by new roads, as well as changes in snag density and configuration across the landscape over a time horizon of several decades, in response to various harvesting patterns. We estimated that a dispersed 40-ha cutblock harvest pattern required about one-third more kilometres of new road over a 50-year period and removal of up to 70% more snags per hectare of harvest for safety purposes, compared with a harvest pattern based on natural-patch size distribution. Each 20% increase in stand-level retention resulted in a roughly equivalent increase in new road required. Up to eight times as many snags were removed per hectare of harvest for safety purposes at a stand-level retention of 70% than at a stand-level retention of 10%. The model appears to be an effective tool for determining the future impact of various harvest-pattern options on a number of important indicators of ecological impact.

Mathematical Modeling of the Drying Process of Chrome Shavings

2015 ◽  
Vol 1101 ◽  
pp. 463-466
Author(s):  
Juan Carlos Beltrán-Prieto ◽  
Nguyen Huynh Bach Son Long ◽  
Karel Kolomazník
Keyword(s):  
Mathematical Modeling ◽  
Laplace Transformation ◽  
Deterministic Model ◽  
Separation Of Variables ◽  
Effective Diffusion ◽  
Water Molecules ◽  
Drying Process ◽  
Tunnel Dryer ◽  
Free Moisture ◽  
Modeling Data

This paper described the mathematical modeling of chrome shavings drying by performing a microscopic balance for water content to describe the unidimensional transfer of water within the solid at a certain temperature. The deterministic model was solved using Laplace transformation and separation of variables methods in order to determine the average free moisture content at different intervals of time during the drying period. Agreement was observed between both, experimental and modeling data. The effective diffusion coefficient of water molecules during the drying of chrome shavings in a tunnel dryer was determined to be 5.8x10-6m2/h.

scholarly journals Automation of the inner design of the aircraft

2019 ◽  
Vol 11 (S) ◽  
pp. 135-141
Author(s):  
Mikhail Yu. KUPRIKOV ◽  
Leonid V. MARKIN
Keyword(s):  
Design Automation ◽  
Geometric Modeling ◽  
Virtual Prototyping ◽  
Practical Implementation ◽  
Cad Systems ◽  
Geometric Models ◽  
Modern Computer ◽  
Modeling Systems ◽  
Swept Surface ◽  
Blind Search

The task of forming the wind-swept surface according to the results of the aircraft’s inner design is described. The approach of the integration of natural and virtual prototyping in the design of equipment compartments is substantiated. Such approaches open up new possibilities for creating intelligent composition algorithms that eliminate the "blind search". For the practical implementation of these approaches, it is necessary to link the appropriate software to standard geometric modeling systems in the form of additional computational modules. Preparing the aircraft for design automation complicates the mathematical description of geometric models of placed objects, increases the complexity of their visualization in modern computer graphics systems and the need to create an additional interface between new geometric models and common CAD systems (SolidWorks, AutoCAD, COMPAS, etc.).

scholarly journals Mountain roads development in Nepal: engineering geological concerns

2000 ◽  
Vol 22 ◽  
Author(s):  
Birendra B. Deoja
Keyword(s):  
Multidisciplinary Approach ◽  
Social Economic ◽  
Road Construction ◽  
Road Building ◽  
The Road ◽  
Mountainous Regions ◽  
Planning And Management ◽  
Mountain Terrain ◽  
Linear Infrastructure

Road construction in the mountainous regions of Nepal has not only added to the road building experience in the rugged mountain terrain but also created awareness that development of linear infrastructure in the mountainous regions requires multidisciplinary approach from social, economic, engineering, environmental, and biotechnical considerations besides substantial engineering-geological inputs. This paper tries to provide a brief account of the practices and developments in mountain-specific planning and management of infrastructure on the basis of experiences from Nepal.

Integrated forest harvest planning and road-building model with consideration of economies of scale

2020 ◽  
Vol 50 (10) ◽  
pp. 989-1001
Author(s):  
Azadeh Mobtaker ◽  
Julio Montecinos ◽  
Mustapha Ouhimmou ◽  
Mikael Rönnqvist
Keyword(s):  
Economies Of Scale ◽  
Road Construction ◽  
Mixed Integer ◽  
Mixed Integer Linear Program ◽  
Road Building ◽  
The Road ◽  
Building Model ◽  
Wood Processing ◽  
Proposed Model ◽  
Transportation Plan

We consider the problem of tactical forest management over a 5-year horizon with yearly periods. The main decisions made consider which harvest areas to cut in each period, the flow of timber from an area to each wood-processing mill to satisfy its annual demand, and which roads to build to access a harvest area not connected to the existing road network. The goal is to minimize the total transportation and road-building costs subject to budget limitations. To explore the benefits of economies of scale (EOS) in road construction, we incorporated this notion in the proposed model. Then, the efficiency of the obtained solution is compared with the model without EOS. The proposed model is a mixed-integer linear program, including several timber assortments and multiple periods. We validated the model for a realistic case in the context of the province of Quebec. The results demonstrate that consideration of EOS significantly reduces the total cost by about 5.3%. In the EOS solution, the road segments that are built every year are very concentrated in specific parts of the region, allowing a road-building company to take advantage of EOS. Moreover, this solution provides a much more efficient timber transportation plan.

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