Mechanical Analysis on Destruction of Coal Cutters Guide Shoes

2012 ◽  
Vol 226-228 ◽  
pp. 780-783
Author(s):  
Zhi Jun Yang ◽  
Wei Na Zhang
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Element Model ◽  
Mechanical Analysis ◽  
Analysis Method ◽  
Mechanics Analysis ◽  
Stress Diagram ◽  
Mining Coal ◽  
Coal Cutters ◽  
The Finite Element Model

Some key components’ failure often occurs in the process of the use of large-scale mining coal machine, and seriously affects the production of the enterprise. So it is necessary that analysis on the failure mechanical reason of guide shoes with the coal-winning machine by the modern mechanics analysis method. The stress diagram of guide shoes could be got by static analysis with MATLAB, and the dangerous parts of the finite element model with guide shoes appeared after loading. Finally, analysis on the fatigue strength and fatigue life of components under various complex condition, which provide some reference theory basis for the future related product designing, Manufacturing and maintenance.

A rapid stress calculation method for short flexspline harmonic drive

2019 ◽  
Vol 36 (6) ◽  
pp. 1852-1867 ◽  
Author(s):  
Shuang Wang ◽  
Gedong Jiang ◽  
Xuesong Mei ◽  
Chuang Zou ◽  
Xian Zhang ◽  
...  
Keyword(s):  
Finite Element ◽  
Calculation Method ◽  
Circumferential Stress ◽  
Element Model ◽  
Analytical Relationship ◽  
Analysis Method ◽  
Content Type ◽  
Stress Calculation ◽  
Mechanics Analysis ◽  
Rapid Calculation

Purpose Because of the compact structure, short flexspline (FS) harmonic drive (HD) is increasingly used. The stress calculation of FS is very important in design and optimization of HD system. This paper aims to study the stress calculation methods for short FS, based on mechanics analysis and finite element method (FEM). Design/methodology/approach A rapid stress calculation method, based on mechanics analysis, is proposed for the short FS of HD. To verify the stress calculation precision of short FS, a complete finite element model of HD is established. The results of stress and deformation of short FS in different lengths are solved by FEM. Findings Through the rapid calculation method, the analytical relationship between circumferential stress and length of cylinder was obtained. And the circumferential stress has proportional relation with the reciprocal of squared length. The FEM results verified that the rapid stress calculation method could obtain accurate results. Research limitations/implications The rapid mechanics analysis method is practiced to evaluate the strength of FS at the design stage of HD. And the complete model of HD could contribute to improving the accuracy of FEM results. Originality/value The rapid calculation method is developed based on mechanics analysis method of cylinder and equivalent additional bending moment model, through which the analytical relationship between circumferential stress and length of cylinder was obtained. The complete three-dimensional finite element model of HD takes the stiffness of bearing into consideration, which can be used in the numerical simulation in the future work to improve the accuracy.

Mechanics Analysis and Optimization of the Reachstacker Spreader

2014 ◽  
Vol 1078 ◽  
pp. 266-270
Author(s):  
Yu Feng Shu ◽  
Yong Feng Zheng
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Maximum Stress ◽  
Element Model ◽  
Static Strength ◽  
Operating Conditions ◽  
Mechanics Analysis ◽  
Calculation Results ◽  
Improvement Measures ◽  
The Finite Element Model

This paper establishes the finite element model of reachstacker spreader, makes static strength calculation under eight typical operating conditions with rated load, based on the calculation results, it points out the weaknesses of spreader and gives some corresponding improvement measures for the drawbacks. Further analysis shows that the maximum stress of improved spreader mechanism has reduced 10.1%, which demonstrates the effectiveness of improvements.

Study on the Buckling Analysis of Stiffened Spherical Shallow Shell for Gasholder Roof

2013 ◽  
Vol 709 ◽  
pp. 320-324
Author(s):  
Dong Yun Jia ◽  
Jun Yang ◽  
De Jin Jiang
Keyword(s):  
Shallow Shell ◽  
Large Scale ◽  
Element Model ◽  
External Pressure ◽  
Buckling Analysis ◽  
Analysis Method ◽  
Plate Method ◽  
Rigidity Analysis ◽  
Shell Design ◽  
The Finite Element Model

Subjected to external pressure, buckling analysis is key problem in the roof shell design of large scale cylinder gasholder. Two simplified buckling analysis methods, the continuous orthotropic plate method and the split-rigidity method, are introduced to check the general instability of stiffened spherical shallow shell. Considering the plate and the stiffeners in two directions with the same contribution to the bending stiffness, the equivalent bending thickness formula is put forward. The finite element model for a 100,000 m³cylinder gasholder roof is setup. The buckling critical loads obtained prove that the split-rigidity analysis method and formulae are applicable. The results can be referred in design of stiffened spherical shallow shell.

The Comparison of the Variety of Finite Element Method (FEM) Based on the Arm of Mining Excavator

2014 ◽  
Vol 697 ◽  
pp. 173-176
Author(s):  
Hao Zou ◽  
Ming Zhang ◽  
Jia Jun Ren
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Material Properties ◽  
Element Model ◽  
Analysis Method ◽  
Ansys Software ◽  
Element Analysis ◽  
Ansys Analysis ◽  
The Finite Element Analysis ◽  
The Finite Element Model

In this paper, authors made contrast with the three finite element methods in analysis accuracy and usability .Those are all based on the structural analysis of mining excavator arm. The first fem is using UG solid modeling capabilities to create model .The finite element model is generated by UG_ANSYS, including setting the loads of material properties and boundary conditions ,also loading work. The process is called preprocessing completely .Then export a“. inp” file,after that, imported that file directly into ANSYS software for solving. The second one is to import solid mode created in UG into ANSYS software directly ,then take pretreatment and solution accordingly.The last one is using UG modeling and UG NX NASTRAN (the finite element analysis function) for structure analysis. It is concluded that using UG completely pretreatment of ANSYS analysis method and UG NX NASTRAN method feel more convenient to operate it with the high analyze accuracy,with the two methods , designers can modify mining mechanical arm weak positions more easily.In turns,they can improve the designing level of physical prototyping.

Finite Element Analysis on Large-Scale Electrical Dust Precipitator Steel Structures

2013 ◽  
Vol 753-755 ◽  
pp. 1196-1200
Author(s):  
Lu Yu Huang ◽  
Yang Gao ◽  
Xia Cao
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Finite Element Model ◽  
Optimization Design ◽  
Large Scale ◽  
Steel Structures ◽  
Element Model ◽  
Element Analysis ◽  
Dust Precipitator ◽  
The Finite Element Model

Based on the construction features of the steel structures of a type of electrical dust precipitator, a finite element model is established with large-scale finite element analysis software ANSYS, and the structure stress and displacement of the model under all sorts of loads are analyzed with the frontal solution method. The results indicate that analysis is relatively accurate, the finite element model and the analysis method is appropriate. The result can be further used for optimization design of the electrical precipitator steel structures.

Structural Optimization of Packer’ Cone with Material Properties and Mechanics Parameters Based on ANSYS

2012 ◽  
Vol 252 ◽  
pp. 172-175
Author(s):  
Zhi Ping Guo ◽  
Wei Guo ◽  
Yan Fei Wang ◽  
Guan Fu Li ◽  
Yan Zheng Lu
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Material Properties ◽  
Theoretical Basis ◽  
Cone Angle ◽  
Element Model ◽  
Mechanical Analysis ◽  
Calculation Results ◽  
Set Up ◽  
The Finite Element Model

Cone is one part of a packer. To understand the seal effectiveness of the packer, mechanical analysis must be made for it. The finite element model of packer is set up and packer minimum setting load changes are calculated under different climb angle of cone. Results show that reduce the cone angle of climb can make the packer sealing load significantly lower.The calculation results provide the theoretical basis for the real operation.

Mechanics Analysis of Omni-Directional Mecanum-Wheel Based on FEM

2012 ◽  
Vol 271-272 ◽  
pp. 1012-1016
Author(s):  
Shao Hua Kang ◽  
Xue Ling Zhang ◽  
Ya Xie
Keyword(s):  
Mechanical Property ◽  
Working Conditions ◽  
Element Model ◽  
Mechanical Analysis ◽  
Mechanical Boundary Condition ◽  
Mechanics Analysis ◽  
Working Status ◽  
Mecanum Wheel ◽  
Failure Life ◽  
The Finite Element Model

The Mechanics property is important for Mecanum-wheel structure. According to function and capacity of wheel, the structure of omni-directional Mecanum-wheel is designed and mechanical boundary condition is analyzed on different working status. On the basis of mechanical analysis, the finite element model is established and loads are applied. Strength and fatigue failure life of every parts are calculated respectively under different working conditions. The result shows that the structure and size of Mecanum-wheel is correct and meet the demand of mechanical property.

scholarly journals Methods for calculating the reinforcement of concrete slabs with carbon composite materials based on the finite element model

2018 ◽  
Vol 251 ◽  
pp. 04061 ◽  
Author(s):  
Valeriy Telichenko ◽  
Vladimir Rimshin ◽  
Ekaterina Kuzina
Keyword(s):  
Finite Element ◽  
Composite Materials ◽  
Finite Element Model ◽  
Large Scale ◽  
Element Model ◽  
Carbon Composite ◽  
Before And After ◽  
Carbon Composite Materials ◽  
Design Values ◽  
The Finite Element Model

In this article, a method is proposed for calculating the reinforcement of concrete ceiling slabs with carbon composite materials based on the finite element model in the computer program SCAD Office PC. This method allows the most complete and accurate representation to be obtained of the structure stress-strain state before and after reinforcement with composite materials. Therefore, it allows high-quality designing and reduces the cost conducting calculations and tests on a large scale. The design values are taken from the initial data, and include conclusions based on the results of analysis of the technical state of the structures and drawings from the calculation section of the CS (reinforced concrete structures).

Mechanical Properties and Parameters Optimization of Large-scale Bearing by Finite Element Simulation

2019 ◽  
Vol 11 (4) ◽  
Author(s):  
Zhihua Zhang
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Large Scale ◽  
Roller Bearing ◽  
Element Model ◽  
Parameters Optimization ◽  
Channel Spacing ◽  
Element Simulation ◽  
Load Carrying ◽  
The Finite Element Model

The structure of large-scale roller bearing has strong load carrying capacity, so it is often used in the system of low-speed operation. In wind power technology, large-scale bearings are used and its reliability is very important. In this paper, the characteristics of two kinds of bearing structures are analysed and then the finite element model is used to simulate the large-scale roller bearing with the load distribution and size of contact angle under actual working conditions. By constructing several large-scale roller bearing support models, the influence of its structure and hardness on its mechanical properties can be established. Finally, the parameters optimization is carried out for channel spacing, to find the most suitable value between the two channels to improve the service life of roller bearings.

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