Finite Element Analysis of High - Pressure Grinding Mill

2011 ◽  
Vol 314-316 ◽  
pp. 675-681
Author(s):  
Yi Liu ◽  
Ji Shun Li
Keyword(s):  
Mathematical Model ◽  
Finite Element Method ◽  
Finite Element ◽  
High Pressure ◽  
Fem Simulation ◽  
Element Analysis ◽  
Important Index ◽  
Set Up ◽  
The Mathematical Model ◽  
Grinding Mill

The stress distribution of the high - pressure grinding roller is an important index of the grinding mill design. A simulation model of high - pressure grinding roller is created by means of finite element method (FEM), utilizing the FEM software ANSYS. At first, the paper calculated the pressure of the high - pressure grinding roller by the grinding materiel mathematical model. Secondly, a physical model is set up material characteristics is defined and the areas are meshed, then the border conditions are established, finally loading and solving are made. The result of the FEM simulation indicated the mathematical model of the grinding materiel is rational.

scholarly journals A Mathematical Model of a Piezo-Resistive Eight-Beam Three-Axis Accelerometer with Simulation and Experimental Validation

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3641 ◽  
Author(s):  
Jinlong Song ◽  
Changde He ◽  
Renxin Wang ◽  
Chenyang Xue ◽  
Wendong Zhang
Keyword(s):  
Mathematical Model ◽  
Finite Element Method ◽  
Finite Element ◽  
Optimal Design ◽  
Experimental Validation ◽  
Fem Simulation ◽  
Normal Direction ◽  
Fem Model ◽  
Working Principle ◽  
The Mathematical Model

A mathematical model of a sensor is vital to deeply comprehend its working principle and implement its optimal design. However, mathematical models of piezo-resistive eight-beam three-axis accelerometers have rarely been reported. Furthermore, those works are largely focused on the analysis of sensing acceleration in the normal direction, rather than in three directions. Therefore, a complete mathematical model of a piezo-resistive eight-beam three-axis accelerometer is developed in this paper. The validity of the mathematical model is proved by a Finite Element Method (FEM) simulation. Furthermore, the accelerometer is fabricated and tested. The prime sensitivities of X, Y and Z axes are 0.209 mV/g, 0.212 mV/g and 1.247 mV/g at 160 Hz, respectively, which is in accord with the values obtained by the model. The reason why the prime sensitivity SZZ is bigger than SXX and SYY is explained. Besides, it is also demonstrated why the cross-sensitivities SXZ and SYZ exceed SZX and SZY. Compared with the FEM model, the developed model could be helpful in evaluating the performance of three-axis accelerometers in an accurate and rapid way.

scholarly journals Finite element analysis of a single conductor with a Stockbridge damper under Aeolian vibration

2021 ◽  
Author(s):  
Oumar Barry
Keyword(s):  
Mathematical Model ◽  
Finite Element ◽  
Fatigue Failure ◽  
Excitation Frequency ◽  
Element Model ◽  
Element Analysis ◽  
Vibrational Response ◽  
Aeolian Vibration ◽  
The Mathematical Model ◽  
Stockbridge Damper

A finite element model is developed to predict the vibrational response of a single conductor with a Stockbride damper. The mathematical model accounts for the two-way coupling between the conductor and the damper. A two-part numerical analysis using MATLAB is presented to simulate the response of the system. The first part deals with the vibration of the conductor without a damper. The results indicate that longer span conductors without dampers are susceptible to fatigue failure. In the second part, a damper is attached to the conductor and the effects of the excitation frequency, the damper mass, and the damper location are investigated. This investigation shows that the presence of a properly positioned damper on the conductor significantly reduces fatigue failure.

The Finite Element Analysis and Structure Optimizing of the 42MN Flatting Mill’s Higher Beam

2010 ◽  
Vol 145 ◽  
pp. 317-320
Author(s):  
Chun Ming Zhang ◽  
Run Yuan Hao
Keyword(s):  
Mathematical Model ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Structural Design ◽  
Structural Parameters ◽  
Element Model ◽  
Optimum Structure ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
The Mathematical Model

This text is on the basis of the investigation of the 42MN flatting mill’s higher beam, establishing the flatting mill’s higher beam’s finite element model and the mathematical model which has optimum structure. According to the results of their structure finite element analysis, weaved the relevant procedures and optimized them, obtained ideal structural parameters, this text provide better ideas and ways for the structural design of the flatting mill’s higher beam.

A Material Selection Method Based on Finite Element Method

2014 ◽  
Vol 887-888 ◽  
pp. 1013-1016
Author(s):  
Sheng Bin Wu ◽  
Xiao Bao Liu
Keyword(s):  
Mathematical Model ◽  
Finite Element Method ◽  
Finite Element ◽  
Material Selection ◽  
Selection Method ◽  
Structure Design ◽  
The Finite Element Method ◽  
The Mathematical Model ◽  
Selection Of ◽  
Element Method

A new method for material selection in structure design based on the theory of the finite element method was presented. The method made material selection and structure design working at the same time. The mathematical model was established based on the finite element method. Finally, the material selection of an excavator's boom was verified, the results show that the proposed method is effective and feasible.

Validation of UAV Wing Structural Model for Finite Element Analysis

2014 ◽  
Vol 71 (2) ◽  
Author(s):  
Gunasegaran Kanesan ◽  
Shuhaimi Mansor ◽  
Ainullotfi Abdul-Latif
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Structural Model ◽  
Element Analysis ◽  
Actual Structure ◽  
Shell Elements ◽  
The Difference ◽  
Set Up ◽  
Element Method

Finite element method is increasingly used in the analysis of aircraft structures, including Unmanned Aerial Vehicles (UAVs). The structural model used for finite element analysis however needs to be validated in order to ensure that it correctly represents the physical behaviour of the actual structure. In this work, a case study of a straight, unswept and untapered wing structure made of composite material subjected to aerodynamic loading was modelled and analysed using finite element method. Four-noded, reduced integration shell elements were used, with structural components attached by adhesive joints modelled using tied surface constraints. For the validation process an experimental set-up of the actual wing was loaded using sandbags to simulate the aerodynamic loads. The deflection of the wing at three key locations were obtained and compared between both methods. It was found that the difference between both results ranges between 0.3% (at the tip) to 36.1% (near the root, for small deflections).

Influence of Assembly Tolerance on Dynamic Characteristics of Motor Rotation Assembly

2013 ◽  
Vol 655-657 ◽  
pp. 608-611 ◽  
Author(s):  
Wei Wen Lv ◽  
Xu Xing Jin
Keyword(s):  
Mathematical Model ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Dynamic Characteristics ◽  
Machine Tools ◽  
Machining Accuracy ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Assembly Tolerance ◽  
The Mathematical Model

The motor rotation assembly of machine tools is mainly composed of spindle, rotor and bearings, it is to some extent the most important component, and its dynamic characteristics directly affect the machining accuracy and efficiency. Although the finite element method is effective to solve such dynamic problem, the conventional method generally ignores the influence of assembly tolerance between the spindle and the rotor .This probably would lead to a larger error result. A new method is described to evaluate the results obtained from finite element analysis .Firstly, a finite element mathematical model of motor rotation assembly is established, and then the model is tested by means of modal experiment, finally, the mathematical model results calculated by MATLAB software is compared with that of modal experiment, the results show that this modeling method is accurate and efficient. Furthermore, rotors of different inner diameters are mounted onto the spindle of same size, and then modal experiment and a finite element analysis are applied to obtain the dynamic characteristics of the motor rotation assembly under different assembly tolerances. This research can provide some reference values for the tolerance design of the motor rotation assembly.

Dynamic States Specific Analysis for Belt Conveyor Based on FDM

2013 ◽  
Vol 278-280 ◽  
pp. 27-30
Author(s):  
Xiao Shen ◽  
Qun Wang ◽  
Zhou Yu Fu ◽  
Shuo Wei Bai ◽  
Zhao Yang Sun
Keyword(s):  
Mathematical Model ◽  
Finite Element Method ◽  
Mathematical Method ◽  
Finite Element ◽  
Continuous Model ◽  
Belt Conveyor ◽  
Specific Analysis ◽  
Simulation Results ◽  
The Mathematical Model ◽  
Dynamic States

There are two common research methods on the dynamic states model of belt conveyor in China at present. The mathematical model is built by finite element method then it is solved by numerical method. And the continuous model is built when the belt is treated as elastic body then it is solved by mathematical method. This paper puts forward the establishment of continuous model, the model is solved by FDM and the simulation results are given.

scholarly journals Finite element analysis of a single conductor with a Stockbridge damper under Aeolian vibration

2021 ◽  
Author(s):  
Oumar Barry
Keyword(s):  
Mathematical Model ◽  
Finite Element ◽  
Fatigue Failure ◽  
Excitation Frequency ◽  
Element Model ◽  
Element Analysis ◽  
Vibrational Response ◽  
Aeolian Vibration ◽  
The Mathematical Model ◽  
Stockbridge Damper

A finite element model is developed to predict the vibrational response of a single conductor with a Stockbride damper. The mathematical model accounts for the two-way coupling between the conductor and the damper. A two-part numerical analysis using MATLAB is presented to simulate the response of the system. The first part deals with the vibration of the conductor without a damper. The results indicate that longer span conductors without dampers are susceptible to fatigue failure. In the second part, a damper is attached to the conductor and the effects of the excitation frequency, the damper mass, and the damper location are investigated. This investigation shows that the presence of a properly positioned damper on the conductor significantly reduces fatigue failure.

scholarly journals The redistribution of temperature-induced interface friction in friction-type high-strength bolted joint after bolt fracture

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Gaoxin Wang ◽  
Youliang Ding
Keyword(s):  
Mathematical Model ◽  
Finite Element ◽  
High Strength ◽  
Element Model ◽  
Structural Members ◽  
Bolted Joint ◽  
Element Analysis ◽  
Interface Friction ◽  
Model Of Friction ◽  
The Mathematical Model

For the friction-type high-strength bolted joint, the bolt fracture can cause redistribution of interface friction, which will seriously endanger the connection safety of structural members. However, current study scarcely focuses on the redistribution of interface friction after bolt fracture. Therefore, this paper will specifically carry out finite element analysis on the redistribution of interface friction caused by fractured bolts. Firstly, the refined finite element model of friction-type high-strength bolted joint is used to investigate the variation of interface friction with uniform temperature and the distribution of interface friction in different areas. Furthermore, stochastic finite element method is introduced to explain how the quantity and location of fractured bolts influence the redistribution of interface friction. Finally, the mathematical model of friction redistribution is built to describe the redistribution of temperature-induced interface friction in the friction-type high-strength bolted joint after bolt fracture. After validation, the mathematical model can well describe the redistribution of interface friction caused by fractured bolts.

Modelling a Precision Positioning System

2015 ◽  
Vol 220-221 ◽  
pp. 374-379
Author(s):  
Giedrius Augustinavičius ◽  
Audrius Čereška
Keyword(s):  
Mathematical Model ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Degree Of Freedom ◽  
Positioning System ◽  
Precision Positioning ◽  
Element Analysis ◽  
The Mathematical Model ◽  
Fine Adjustment

The paper presents the model and design of a flexure-based precise 4 DOF degree of freedom positioning system for micro-positioning uses. The positioning system is featured with monolithic architecture, flexure-based joints and ultra-fine adjustment screws. The mathematical model for the output displacements of the positioning system has been verified by finite element analysis (FEA).

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