scholarly journals Analysis of Stress, Strain, and Fatigue Strength of the Rotary Table of Boom-type Roadheaders

2020 ◽  
Author(s):  
Jie Tian ◽  
lansheng zhang ◽  
haifeng yao ◽  
miao Wu
Keyword(s):  
Working Conditions ◽  
Stress And Strain ◽  
Rotary Table ◽  
Element Analysis ◽  
Flexible Bodies ◽  
Cutting Head ◽  
Adams Simulation ◽  
Load Calculation ◽  
Bottom Left ◽  
Left Middle

Abstract The rotary table is the key component in the optimal design of roadheaders. In this study, a simulation model of the cutting part and a rotary table is established in SolidWorks, and stress analysis and strength evaluation of the structure of the rotary table are performed. To this end, finite element analysis is performed on the basis of the dynamic theory of a coupled multibody system comprising rigid and flexible bodies. Considering actual working conditions, the load file of the cutting head is calculated based on the development of the “Roadheader Machine load Calculation Program”, and the stress and strain cloud map of the cutting head running to the bottom left, middle end, and right end of the rotary table is obtained through Adams simulation. Then, the 6-order modal analysis is carried out, and the S-N curve of the turntable is finally established. In addition, the fatigue life reliability of the turntable is analyzed using the AWE fatigue module. The results show that, provided reliable working conditions, the EBZ160 type roadheader machine during the normal service life shows no risk of fatigue failure under normal working load.

scholarly journals Analysis of Stress, Strain, and Fatigue Strength of the Rotary Table of Boom-Type Roadheaders

2020 ◽  
Author(s):  
Jie tian ◽  
Lansheng Zhang ◽  
Haifeng YAO ◽  
Miao WU
Keyword(s):  
Working Conditions ◽  
Stress And Strain ◽  
Rotary Table ◽  
Element Analysis ◽  
Flexible Bodies ◽  
Cutting Head ◽  
Adams Simulation ◽  
Load Calculation ◽  
Bottom Left ◽  
Left Middle

Abstract The rotary table is the key component in the optimal design of roadheaders. In this study, a simulation model of the cutting part and a rotary table is established in SolidWorks, and stress analysis and strength evaluation of the structure of the rotary table are performed. To this end, finite element analysis is performed on the basis of the dynamic theory of a coupled multibody system comprising rigid and flexible bodies. Considering actual working conditions, the load file of the cutting head is calculated based on the development of the “Roadheader Machine load Calculation Program”, and the stress and strain cloud map of the cutting head running to the bottom left, middle end, and right end of the rotary table is obtained through Adams simulation. Then, the 6-order modal analysis is carried out, and the S-N curve of the turntable is finally established. In addition, the fatigue life reliability of the turntable is analyzed using the AWE fatigue module. The results show that, provided reliable working conditions, the EBZ160 type roadheader machine during the normal service life shows no risk of fatigue failure under normal working load.

Finite Element Analysis of Universal-Rod Steel-Shuttering Jumbo for Tunnel Lining

2011 ◽  
Vol 71-78 ◽  
pp. 3443-3447
Author(s):  
Wei Ping Peng ◽  
Yan Ting Huang ◽  
Dao Ming Wang
Keyword(s):  
Finite Element ◽  
Working Conditions ◽  
Structural Reliability ◽  
Design Method ◽  
Tunnel Lining ◽  
Stress And Strain ◽  
Element Analysis ◽  
Boundary Constraints ◽  
Finite Element Technology ◽  
Dangerous Condition

Universal-rod steel-shuttering jumbo (URSSJ), as a key construction equipment for tailrace tunnel lining of underground plant in Pubugou hydropower station, has a good reusability in structure but must satisfy the requirements of intensity, rigidity and supporting stability. Due to complicated working conditions of the URSSJ, it is difficult to calculate stress and strain of the URSSJ based on traditional design method. In this paper, finite element technology is introduced into the analysis of the URSSJ. The approach of this work includes steps of (1) analyzing the structure, working conditions and load characteristics of the URSSJ, (2) modeling the hinge system by meshing, loading and boundary constraints, and (3) computing stress and strain of its major components under the most dangerous condition. The results verify design feasibility and structural reliability of the URSSJ.

Design and Study of Gate-Type Steel-Shuttering Jumbo for Tunnel Lining Based on CAD/CAE

2011 ◽  
Vol 84-85 ◽  
pp. 14-18
Author(s):  
Wei Ping Peng ◽  
Jun Yi Xia ◽  
Zhi Qiang Zhang
Keyword(s):  
Working Conditions ◽  
Three Dimensional ◽  
Structure Design ◽  
Tunnel Lining ◽  
Stress And Strain ◽  
Element Analysis ◽  
Design And Optimization ◽  
Type Steel ◽  
Cae Technology ◽  
Shape And Size

The gate-type steel-shuttering jumbo is key construction equipment for tunnel lining, which is usually designed for customization according to the shape and size of the tunnel. Aiming at the insufficiency of existing methods in the jumbo design, the CAD/CAE technology is introduced into the domains of the jumbo design. In this paper, the gate-type steel-shuttering jumbo for spillway lining in Xiluodu hydropower station is designed, and virtual assembly is established based on three-dimensional digital model using Pro/E software. The stress and strain of the jumbo under different working conditions are analyzed by ANSYS. The result of finite element analysis can be regarded as the basis of structure design and optimization of the jumbo, and can be used to verify the design feasibility at the same time.

Finite Element Analysis of Motor Box for EBZ160 Horizontal Roadheader

2015 ◽  
Vol 1090 ◽  
pp. 233-237
Author(s):  
Ji Jun Miao ◽  
Ri Sheng Long
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimal Design ◽  
Safety Factor ◽  
Stress And Strain ◽  
Element Analysis

In order to solve the cracking and poor reliability problems of motor box of Horizontal Roadheader, the static structural FEA (Finite Element Analysis) of cutting arm & motor box of the EBH160 Horizontal Roadheader was conducted, and the stress and strain contours of FEA were obtained. By comparing the calculated results, the safety factor of cutting arm & motor box was 1.36, which provides a reference for the optimal design of cutting arm & motor box.

Finite Element Analysis of Drilling Frame on Down-the-Hole Drill Based on Mechanical Mechanics and Mechanical Properties

2014 ◽  
Vol 908 ◽  
pp. 282-286
Author(s):  
Wan Rong Wu ◽  
Lin Chen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Working Condition ◽  
Slenderness Ratio ◽  
Stress And Strain ◽  
Limit States ◽  
Element Analysis ◽  
Practical Engineering ◽  
Structure Strength ◽  
Strength And Stiffness

Drilling frame on TD165CH Down-The-Hole Drill that has large slenderness ratio and be longer than 10m is one component of Down-The-Hole drill which is mainly subjected to load.In the process of drilling, drilling frame is not only subjected to loads which are like tensile, compression and torsion and so on, and be under the influence of impacting and vibration of impactor,the situation of force is complicated.By analysing of working condition of Down-The-Hole drill,there get all kinds of limit states of typical working conditions, and then using Ansys doing finite element analysis, there get distribution of the stress and strain of drilling frame and the result of modal analysis to check whether drilling frame meets the requirements of strength and stiffness or not,and whether it is possible to resonate with the impactor or not.By analysis,Structure strength and stiffness of drilling Frame on TD165CH Down-The-Hole drill meet the requirements of practical engineering, and drilling Frame does not resonate with the impactor.

Optimal Design of Bi- and Multi-Stable Compliant Cellular Structures

2018 ◽  
Author(s):  
Quantian Luo ◽  
Liyong Tong
Keyword(s):  
Optimal Design ◽  
Virtual Work ◽  
Reaction Force ◽  
Nonlinear Finite Element ◽  
Cellular Structures ◽  
Stress And Strain ◽  
Principle Of Virtual Work ◽  
Stable States ◽  
Threshold Method ◽  
Element Analysis

This paper presents optimal design for nonlinear compliant cellular structures with bi- and multi-stable states via topology optimization. Based on the principle of virtual work, formulations for displacements and forces are derived and expressed in terms of stress and strain in all load steps in nonlinear finite element analysis. Optimization for compliant structures with bi-stable states is then formulated as: 1) to maximize the displacement under specified force larger than its critical one; and 2) to minimize the reaction force for the prescribed displacement larger than its critical one. Algorithms are developed using the present formulations and the moving iso-surface threshold method. Optimal design for a unit cell with bi-stable states is studied first, and then designs of multi-stable compliant cellular structures are discussed.

Finite Element Analysis of Metal Flow of Finishing Groove in Hot Continuous Rolling Bar

2012 ◽  
Vol 510 ◽  
pp. 667-672
Author(s):  
Jia Lin Zhou ◽  
Chen Gang Pan ◽  
Xiao Yong Zhang
Keyword(s):  
Strain Distribution ◽  
Metal Flow ◽  
Dimensional Accuracy ◽  
Stress And Strain ◽  
Fe Model ◽  
Element Analysis ◽  
Iron And Steel ◽  
Expansion Angle ◽  
The Stability ◽  
Stress And Strain Distribution

This article established 3D FE model of dual-radius arc finishing groove and tangent expansion angle finishing groove using ANSYS / LS-DYNA software for Wuhan Iron and Steel plant Ф16 hot continuous bar, and analyzed metal flow pattern, stress and strain distribution of two types finishing grooves. The results show that surface stress and strain distribution of dual-radius arc finishing groove have better uniform than them of tangent expansion angle finishing groove, and dual-radius arc finishing groove ensures the stability of the rolled piece in finishing groove, improve the dimensional accuracy and surface quality of rolled finishing product.

Miniaturization of injection abrasive water jet machining process

2006 ◽  
Vol 220 (11) ◽  
pp. 1697-1705 ◽  
Author(s):  
H Orbanic ◽  
B Jurisevic ◽  
D Kramar ◽  
M Grah ◽  
M Junkar
Keyword(s):  
Water Jet ◽  
Heat Sinks ◽  
Machining Process ◽  
Process Efficiency ◽  
Abrasive Water Jet ◽  
Element Analysis ◽  
Abrasive Particles ◽  
Cutting Head ◽  
Simulation Based ◽  
Awj Cutting

This contribution presents the possibilities of applying abrasive water jet (AWJ) technology for multi-material micromanufacture. The working principles of injection and suspension AWJ systems are presented. Characteristics of this technology, such as the ability to machine virtually any kind of material and the absence of a relevant heat-affected zone, are given, especially those from which the production of microcomponents can benefit. A few attempts to miniaturize the AWJ machining process are described in the state-of-the-art preview. In order to develop and improve the AWJ as a microtool, a numerical simulation based on the finite element analysis is introduced to evaluate the effect of the size abrasive particles and the process efficiency of microsized AWJ. An ongoing project in which an improved mini AWJ cutting head is being developed, is presented. Finally, the possible fields of application are given, including a case study on the machining of miniaturized heat sinks.

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