Theoretical Research and Simulation Analysis on the Cutter Spacing of Double Disc Cutters Breaking Rock

2019 ◽  
Vol 23 (7) ◽  
pp. 3218-3227 ◽  
Author(s):  
Peng Zhou ◽  
Jingjing Guo ◽  
Jian Sun ◽  
Defang Zou
Keyword(s):  
Simulation Analysis ◽  
Theoretical Research ◽  
Disc Cutters ◽  
Cutter Spacing

The Cleaning Performance Simulation of Rear Rolling Type Sweeper

2013 ◽  
Vol 385-386 ◽  
pp. 281-287
Author(s):  
Zhi Qiang Wang ◽  
Xue Liang Bian ◽  
You Ning Feng
Keyword(s):  
Theoretical Model ◽  
Simulation Analysis ◽  
Virtual Prototype ◽  
Ideal Theory ◽  
Contact Dynamics ◽  
Theoretical Research ◽  
Prototype Model ◽  
Prototype System ◽  
Working Process ◽  
Element Analysis

Through analyzed the cleaning process of rear rolling type sweeper, the theoretical model of waste particle trajectory was established during the sweeper working process by using the contact theory of modern contact dynamics, and the ideal theory track of waste particle was simulated and optimized by using MATLAB. The three-dimensional solid model of the working device was created by using UG software, and virtual prototype model was completed by using ADAMS software, and rigid brush was replaced by neutral file with brush features characterize that was generated by finite element analysis software, and contact relationship of waste particle during the working process was added by ADAMS contact order, and rigid-flexible coupling virtual prototype system was completed and kinematics simulation was run. Finally, compared the trajectory curve from ADAMS simulation with the theoretical path from MATLAB, the Theoretical model was proved correctness. The theoretical research and simulation analysis was made test and verify each other. Facilitate the development of the same type of products.

Research Status of Local Stability in the Web of Castellated Components

2013 ◽  
Vol 291-294 ◽  
pp. 1117-1121
Author(s):  
Wen Qian Yin ◽  
Lian Guang Jia ◽  
Bo Shao
Keyword(s):  
Numerical Simulation ◽  
Cross Section ◽  
Stability Problem ◽  
Local Stability ◽  
Economic Benefit ◽  
Simulation Analysis ◽  
Theoretical Research ◽  
Web Openings ◽  
The Web ◽  
Section Form

Castellated components have many advantages such as high bearing capacity, better bending stiffness, reasonable cross-section form and significant economic benefit. Castellated components are weakened by the reason of web openings, so it is more prone to appear local stability problem. Therefore, the researches of local stability in castellated components play a very important role in the application of the castellated components. In this issue, scholars at home and abroad do a lot of researches, including theoretical research, numerical simulation analysis and experimental research. But the research of castellated bending components are still in groping stage .That has seriously hampered the application and promotion of castellated components in China. So it is necessary to study the local stability of castellated components.

The Seismic Performance Simulation Analysis on the Irregular Structure of the Castle Hotel of Dalian

2013 ◽  
Vol 663 ◽  
pp. 80-86
Author(s):  
Hai Qing Liu ◽  
Ming Ji Ma ◽  
Gui Jun Wang
Keyword(s):  
Finite Element ◽  
Seismic Response ◽  
Simulation Analysis ◽  
Three Dimensional ◽  
Time History ◽  
Element Model ◽  
Theoretical Research ◽  
Element Analysis ◽  
Disaster Experience ◽  
Irregular Structure

More and more irregular structure appears in people's lives, while the theoretical research and disaster experience show that the irregular structure in the earthquake will produce translation and torsion coupled spatial vibration, and sometimes it will cause very serious consequences. Being based on the practical engineering -the Castle Hotel of Dalian, this text makes use of finite element analysis software--- ANSYS. By analyzing the dynamic characteristics and seismic response, we get the self-vibration characteristics of the structure and the time history curve of top level displacement and acceleration of the structure under the effect of earthquake forces. The calculation results indicate that it is effective and reasonable to set up three-dimensional finite element model used for the analyzing of seismic response by ANSYS.

scholarly journals Dynamic Rock-Breaking Process of TBM Disc Cutters and Response Mechanism of Rock Mass Based on Discrete Element

2022 ◽  
Vol 2022 ◽  
pp. 1-10
Author(s):  
Qinglong Zhang ◽  
Yanwen Zhu ◽  
Canxun Du ◽  
Sanlin Du ◽  
Kun Shao ◽  
...  
Keyword(s):  
Rock Mass ◽  
Failure Modes ◽  
Confining Pressure ◽  
Rock Breaking ◽  
Disc Cutter ◽  
Repeated Loading ◽  
Response Mechanism ◽  
Disc Cutters ◽  
Crack Penetration ◽  
Cutter Spacing

Rock-breaking efficiency of full-face rock tunnel boring machine (TBM) is closely related to the performance of the disc cutter and the characteristics of the rock mass. In the point of view of mesomechanics, the particle flow code (PFC) is used to establish a numerical model of the rock mass and the disc cutter, and the process of TBM disc cutter intrusion into the rock mass is analyzed. The dynamic response mechanism and crack evolution process of the rock mass under the action of the disc cutter are studied on the basis of micromechanics, and the relationship between the rock mass crack, penetration, and cutting force during the intrusion of the disc cutter is revealed. The sensitivity analysis is carried out on the confining pressure conditions and the influence parameters of the disc cutter spacing. The results show that the rock breaking by disc cutter undergoes the transformation characteristics of compaction, shearing, and tension failure modes, and the failure process of the rock mass is the joint action of tension and shear. In the whole process of rock breaking, the disc cutter has the phenomenon of repeated loading-unloading alternation and leaping rock breaking; after the penetration of the disc cutter reached 9.0 mm, penetration creaks begin to appear on the surface of the rock mass; the penetration was obviously reduced with the increase of confining pressure, and it is mainly the penetration cracks on the surface; after the disc cutter spacing reaches 100.0 mm, there is no penetration crack between the two disc cutters. The research conclusion can provide a reference for the disc cutter optimization design.

Design and Simulation Analysis of HTS Wind Generator

2013 ◽  
Vol 312 ◽  
pp. 138-142 ◽  
Author(s):  
Peng Cheng ◽  
Geng Wang ◽  
Peng Qin ◽  
Feng Yan Li
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
Permanent Magnet ◽  
Field Distribution ◽  
High Temperature Superconductor ◽  
Simulation Analysis ◽  
Theoretical Research ◽  
Ybco Bulk ◽  
Wind Generator ◽  
The World

With the development of high temperature superconductor (HTS) material, countries all over the world have shown great attention in HTS generator over the theoretical research and application. In this paper, a 3MW high temperature superconductor wind generator has been designed by using the RM and Maxwell 2D module of FEM software Ansoft. This design use the second generation HTS material YBCO bulk to be the permanent magnet. It break through the capability limitation of the traditional permanent magnet generation. Based on the FEM simulating, calculating and changing the parameter, the data of the HTS wind generator has been shown, such as magnet line of force, magnetic-field distribution and so on. Compared with the traditional permanent magnet generation, the HTS wind generator has a strong superiority in various aspects.

Electromagnetic Simulation and Dynamic Analysis about the Electromagnetic Propelling System of Magnetic Suspension Launcher

2014 ◽  
Vol 599-601 ◽  
pp. 306-311
Author(s):  
Yun Sheng Zhang ◽  
Xiao Ning Chen ◽  
Li Yang Huang ◽  
Peng Chen
Keyword(s):  
Electromagnetic Field ◽  
Dynamic Analysis ◽  
Simulation Analysis ◽  
Linear Motor ◽  
Electromagnetic Theory ◽  
Influential Factors ◽  
Magnetic Suspension ◽  
Theoretical Research ◽  
Electromagnetic Simulation ◽  
Depth Study

Launcher is widely used in rescue and delivering items. On the basis of the electromagnetic theory, magnetic suspension principle and linear motor theory, we put forward the idea of magnetic suspension launcher. Through the theoretical research and simulation analysis, an in- depth study is also given to the distribution of the electromagnetic field and other influential factors concerning the propelling system, which provides the basis for the design of magnetic suspension launcher.

scholarly journals Research on numerical simulation and intelligent computing of vehicle wading driving by smooth particle hydrodynamics method

2021 ◽  
Vol 2083 (4) ◽  
pp. 042091
Author(s):  
Wei Zhang ◽  
Peigang Jiao ◽  
Qinzhong Hou
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Engineering Application ◽  
Test Site ◽  
Theoretical Research ◽  
Smooth Particle Hydrodynamics ◽  
Sph Method ◽  
Intelligent Computing ◽  
Simulation Process ◽  
Particle Hydrodynamics

Abstract The method based on Smooth Particle Hydrodynamics (SPH) is a meshless method which is widely used at present. Its advantage is that it can effectively improve the mesh distortion when finite element is used to deal with large deformation, and its particle characteristics are suitable to deal with the simulation problem of fluid. Based on the actual vehicle wading test site and the actual parameters of the vehicle, combined with the actual situation and theoretical basis, the SPH method is used for numerical simulation analysis of the vehicle wading problem. By comparing the simulation process with the actual water changes during wading, the feasibility of using SPH method in vehicle wading application is proved. In the simulation process of vehicle wading driving, under the condition of constant water level, by setting different wading speeds of vehicle, the flow law and change mechanism of water free surface are analyzed, which are of great significance in theoretical research and engineering application research.

The Analysis for the Influence of Individual Node Base on the Network Community

2014 ◽  
Vol 6 (4) ◽  
pp. 15-23
Author(s):  
Hai-Feng Zhang ◽  
Yun Liu ◽  
Jun-Jun Chen
Keyword(s):  
Social Network ◽  
Simulation Analysis ◽  
Theoretical Research ◽  
Network Node ◽  
Practical Application ◽  
The Real ◽  
Network Community ◽  
The Social ◽  
Community Attribute ◽  
Individual Node

This paper discussed the identification of theoretical research and practical application value that the influence of individual node in the social network node; Secondly, this paper proposes a influence of individual node arithmetic based on network community attribute, and carries on the simulation analysis in the real social network to compared with the influence of individual node that without network community attribute superposition.

Numerical Simulation of Rock Fragmentation Process Induced by Two Disc Cutters

2011 ◽  
Vol 366 ◽  
pp. 224-228 ◽  
Author(s):  
Lin Tao Man ◽  
Shou Ju Li
Keyword(s):  
Rock Breaking ◽  
Rock Fragmentation ◽  
Fragmentation Process ◽  
The Finite Element Method ◽  
Penetration Process ◽  
Disc Cutters ◽  
Adjacent Disc ◽  
Realistic Description ◽  
Cutter Spacing ◽  
Fragmentation Processes

Rock fragmentation processes induced by two cutters were simulated by ABAQUS software with different cutter spacing. A series of numerical experiments reproduce the progressive process of rock fragmentation in indentation. The influence of different cutter spacing on the penetration process can also be clearly researched. Rock fragmentation process induced by two TBM disc cutters was performed using the finite element method. The simulation not only provided a realistic description of the rock fragmentation mechanism, but also supported the sufficient proof for the cutter spacing optimization between adjacent disc cutters for a given penetration depth. When the penetration is 6 mm, the cutter spacing optimization is 48 mm. The result shows that the numerical simulations will contribute to an improved knowledge of rock fragmentation in indentation and will be useful for performance assessment of TBM, which will enhance the efficiency of rock breaking.

Research on the Optimal Disc Cutter Spacing for Rock-Breaking Based on ANSYS

2014 ◽  
Vol 664 ◽  
pp. 143-147
Author(s):  
Yan Li ◽  
Ke Zhang ◽  
Jian Sun ◽  
Hong Sun ◽  
Zi Nan Wang
Keyword(s):  
Finite Element ◽  
Rock Breaking ◽  
Rock Fragmentation ◽  
Cutting Process ◽  
Disc Cutter ◽  
Rock Stress ◽  
Fragmentation Efficiency ◽  
Finite Element Software ◽  
Disc Cutters ◽  
Cutter Spacing

Objective: To study the influence of disc cutter spacing on rock fragmentation efficiency and optimize cutter layout and improve the efficiency of disc cutter. Method: ANSYS, a finite element software was used to simulate double disc cutter cutting process. Result: Find a good corresponding relationship between penetration and cutter spacing. At the process of sandstone, if disc cutter spacing as 54 ~ 55 mm, rock crushing as the largest and rock fragmentation efficiency is the highest; with the penetration of 10 mm. If disc cutter spacing as 66~68.5mm, rock crushing as the largest and rock fragmentation efficiency is the highest with the penetration of 15 mm. Changing the cutter spacing and penetration, rock stress and broken degree will also change. Conclusion: Double disc cutters change within the range of best cutter spacing, cutter spacing is proportional to the rock crushing. If the cutter distance is greater than the best cutter spacing, the ledge will be appeared. For one type of rocks, the penetration would have some effects on the optimal cutter spacing. If the penetration increases, the optimal cutter spacing increases gradually, at the time of other construction parameters unchanged.

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