Application and Research of Digital Technology in Optimal Design of CNC Floor Boring and Milling Machine

2012 ◽  
Vol 429 ◽  
pp. 111-115
Author(s):  
Zhen Long Leng ◽  
Jin Feng Yang ◽  
Qun Ping Liu ◽  
Xun Deng
Keyword(s):  
Numerical Simulation ◽  
Optimal Design ◽  
Digital Technology ◽  
Three Dimensional ◽  
Milling Machine ◽  
Machine Model ◽  
Digital Modeling ◽  
Key Technologies ◽  
The Cost ◽  
Interference Checking

This paper focuses on application of the three-dimensional digital modeling, numerical analysis and optimization, digital control and other key technologies which provide technical support for the design and development in CNC floor boring and milling machine manufactruing. The three-dimensional digital modeling, digital assembly, interference checking help to eliminate some hidden trouble before processing and assembly. Numerical simulation reduces the cost and shortens the cycle of designand manufactruing in the optimal design of the machine. This technique has been successfully applied to a CNC Floor Boring and Milling Machine Model, which has been running for three years and achieved satisfactary economic result.

Constructal Placement of High-Conductivity Inserts in a Slab: Optimal Design of “Roughness”

2001 ◽  
Vol 123 (6) ◽  
pp. 1184-1189 ◽  
Author(s):  
M. Neagu and ◽  
A. Bejan
Keyword(s):  
Numerical Simulation ◽  
Heat Conduction ◽  
Optimal Design ◽  
Contact Resistance ◽  
Rough Surface ◽  
Fundamental Problem ◽  
Three Dimensional ◽  
High Conductivity ◽  
Constant Thickness ◽  
Two Dimensional

This paper addresses the fundamental problem of how to facilitate the flow of heat across a conducting slab heated from one side. Available for distribution through the system is a small amount of high-conductivity material. The constructal method consists of optimizing geometrically the distribution of the high-conductivity material through the material of lower conductivity. Two-dimensional distributions (plate inserts) and three-dimensional distributions (pin inserts) are optimized based on the numerical simulation of heat conduction in a large number of possible configurations. Results are presented for the external and internal features of the optimized architectures: spacings between inserts, penetration distances, tapered inserts and constant-thickness inserts. The use of optimized pin inserts leads consistently to lower global thermal resistances than the use of plate inserts. The side of the slab that is connected to the high-conductivity intrusions is in effect a “rough” surface. This paper shows that the architecture of a rough surface can be optimized for minimum global contact resistance. Roughness can be designed.

Numerical Calculations of Bidirectional Characteristics on Tidal Current Runner

2013 ◽  
Author(s):  
Long Li ◽  
Yu Chen ◽  
Ze Wang
Keyword(s):  
Numerical Simulation ◽  
Optimal Design ◽  
Tidal Current ◽  
Theoretical Basis ◽  
Dynamic Performance ◽  
Three Dimensional ◽  
Good Choice ◽  
Numerical Calculations ◽  
Three Dimensional Flow ◽  
Plane Flow

It would be a good choice to use the bidirectional tidal current runner, during the tide rises or ebbs. And how to improve its performance in both positive and reverse condition has become a seeking aim for designers. The shape of airfoil has important influence on the dynamic performance of the blade. Many researchers have proved that to choose the suitable airfoil’s camber and thickness can improve the dynamic performance of the turbine. The S-shaped airfoil was designed, considering influence of various factors. The CFD technology is used to do the numerical simulation for the airfoil’s plane flow and three-dimensional flow of the reversible turbine. The effects of the blade’s camber and thickness on the reversible turbine are analyzed, with the purpose of providing theoretical basis for optimal design of the reversible turbine. The research results show that the efficiency of the reversible turbine is lower than that of the turbine with standard airfoil, but its dynamic performance is completely identical between positive condition and reverse condition. And it can be used for generation during the tide rises or ebbs.

Numerical Calculation of NACA0015 Rudder's Open Water Hydrodynamic Forces

2013 ◽  
Vol 444-445 ◽  
pp. 427-431
Author(s):  
Xiao Wang ◽  
Zhan Sheng Gao ◽  
Jian Jun Hou ◽  
Ai Guo Shi
Keyword(s):  
Numerical Simulation ◽  
Numerical Calculation ◽  
Numerical Model ◽  
Three Dimensional ◽  
Open Water ◽  
Hydrodynamic Forces ◽  
Cfd Model ◽  
Three Dimensional Flow ◽  
Computing Platform ◽  
Key Technologies

In this paper, Based on the research of CFD basic theory and several key technologies, the numerical model for solving three-dimensional flow field around the open water rudder is proposed. And with the help of computing platform FLUENT, several kinds of numerical simulation of maneuverable movement of NACA0015 rudder have been done. The numerical results are compared with experimental results, showing that the CFD model which is proposed in this paper is suitable for computation of hydrodynamic forces and simulation of the viscous flow around the open water rudder.

Evaluation Of The Functional Of Space-Planning Arrangement Of A Building

2019 ◽  
pp. 4-9
Keyword(s):  
Numerical Simulation ◽  
Life Cycle ◽  
Initial Data ◽  
Objective Assessment ◽  
Objective Evaluation ◽  
Point Of View ◽  
Shopping Centers ◽  
Space Planning ◽  
Planning Decisions ◽  
The Cost

The article focuses on the problem of the lack of objective evaluation of space-planning arrangement of buildings as a creative approach of the architect to the performing of functional tasks by the object. It is proposed to create a methodology for assessing the functional of space-planning solutions of buildings on the basis of numerical simulation of functional processes using the theory of human flows. There is a description of the prospects of using this method, which makes it possible to increase the coefficient of compactness, materials and works saving, more efficient use of space, reduce the cost of the life cycle of the building, save human forces and time to implement the functional of the building. The necessary initial data for modeling on the example of shopping and shopping-entertainment centers are considered. There are three main tasks for algorithmization of the functional of shopping centers. The conclusion is made about necessity of development of a method for objective assessment of buildings from the point of view of ergonomics of space-planning decisions based on the study of human behavior in buildings of different purposes.

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