Study on Multi-Objective Optimization of the Turning Process of en 10503 Steel by Combination of Taguchi Method and Moora Technique

Abstract

The aim of research is to simulate the zones of solar radiation on the curved surfaces of the shells of high-rise buildings for the effective use of renewable solar energy. An urgent task is the development of tools that can substantiate the decision-making by designers about the location of solar thermal devices in the energy-efficient design of curvilinear high-rise buildings. The main attention is paid to high-rise buildings, is actively growing in modern megalopolises and requires a significant energy resource. To optimize the integration of solar thermal devices in high-rise buildings, it is important to take into account a set of design parameters, including parameters of surface shape and location in space. A feature of curved surfaces, considered in the study, is their aerodynamic properties, which provide them with the advantage of choosing among modern high-rise buildings. At the same time, the complexity of setting the parameters of a curved surface to determine the zones of solar radiation for the effective use of regenerative solar energy lies in providing reliable and convenient tools for optimizing decision-making.
 The study proposes an application of the method based on a discrete geometric model of solar radiation input on the surface of the shells of high-rise buildings, described by compartments of curved geometric surfaces. As a result of modeling, let’s obtain a family of lines of the same level of solar radiation on a certain curved surface for the given parameters of time and geographic location. As an example of simulation modeling, the performed calculations of the instantaneous model of the distribution of solar radiation on the compartments of the curved surfaces of an ellipsoid of revolution, hemisphere, hyperbolic paraboloid. On the basis of the proposed model for the distribution of solar radiation over curvilinear surfaces of buildings, the influence of factors arising in the design process is investigated: changes in the geometric parameters of the surface shape, orientation to the cardinal points, the formation of zones of its own shadow on surfaces. Calculations were performed and instantaneous solar radiation zones were constructed on the surfaces of a hemisphere, a hyperbolic paraboloid with various geometric parameters, taking into account different orientations relative to the cardinal points, and determining the zones of its own shadow.
 At this stage of the study, the result is an algorithm for constructing zones of different levels of solar radiation on curved surfaces of high-rise buildings. The advantage of the algorithm is the ability to analyze the results of changes in the design parameters of the surface of a high-rise building when placing solar systems on them. The proposed approach will provide a basis for automating the modeling process, will help expand the scope of solar systems in high-rise construction and increase the efficiency of their work

Multi-criteria decision making under the MARCOS method and the weighting methods: applied to milling, grinding and turning processes

“…In the entropy weight method, the weights of the objectives can be found by the following steps [32].…”

A combination method for multi-criteria decision making problem in turning process

“…The values S þ i , S À i and C Ã i are calculated according to the respective formulas (20), ( 21) and (22), which are presented in Table 14. The ranking of options was also performed in Table 14.…”

“…The MOORA method was used for multi-criteria decision making when turning EN 10503 steel [22]. The authors of this study also designed an experimental matrix according to the Taguchi method with nine experiments.…”

Application of TOPSIS an PIV Methods for Multi - Criteria Decision Making in Hard Turning Process

“…Turning is the most common machining method among cutting and machining methods [1]. There are many criteria to evaluate turning process such as surface roughness, roundness error, cylindrical error, cutting force, tool wear, cutting power, etc.…”

“…A study with aim is to select the cutting parameters (cutting speed, feed rate, and depth of cut) to simultaneously ensure that the six surface roughness parameters (including Rq, Ra, Rt, Rku, Rz, and Rsm) having the smallest values. In _____________ 1 Faculty of Mechanical Engineering, Hanoi University of Industry, Vietnam * E-mail: doductrung@haui.edu.vn https://doi.org/10.36897/jme/142599 this study, the weights of the criteria were determined by the Standard deviation method (SDM) [7]. Selecting the cutting parameters to simultaneously ensure the minimum surface roughness and the maximum material removal rate (MRR), where the weights of the parameters have been chosen by the decision-maker [8].…”