scholarly journals Influence of Load Weight on Dynamic Response of Vibrating Screen

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Yong-Zheng Jiang ◽  
Kuan-Fang He ◽  
Yong-Le Dong ◽  
Da-lian Yang ◽  
Wei Sun
Keyword(s):  
Dynamic Response ◽  
Excitation Frequency ◽  
Three Dimensional ◽  
Element Model ◽  
Sudden Increase ◽  
Dynamic Design ◽  
Vibrating Screen ◽  
Screening Efficiency ◽  
Three Dimensional Finite Element ◽  
Load Weight

The dynamic response of the vibrating screen has a great impact on the screening efficiency and fatigue life of the structures. For the conventional dynamic design, the consideration of the influence of load weight on dynamic response is lacking. So, in this paper, taking a very common vibrating screen used in tunnel construction as an example, the relationship between the screen dynamic response and the load weight is studied through numerical simulations. Firstly, to make sure the accuracy of simulation, the three-dimensional finite element model of a vibration screen is strictly built to maximize consistency with the real screen, and then the simulated results are validated by experiments. Furthermore, the variation regularity of dynamic response with the load weight and excitation frequency is analyzed based on simulations. Results show the load weight has obvious influence on the modal shapes as well as the natural frequencies. There are three regions that will lead to the sudden increase of vibration acceleration: (1) the load weight variates within 0–50 kg and excitation frequency variates within 40–60 Hz; (2) the load weight variates within 10–100 kg and excitation frequency variates within 50–90 Hz; (3) the load weight variates within 80–200 kg and excitation frequency variates within 70–100 Hz. These results will provide new theoretical reference for the maintenance and further improvement in the dynamic design of the vibrating screen.

The Dynamic Response of Railway Ballast to the Action of Trains Moving at Different Speeds

1996 ◽  
Vol 210 (2) ◽  
pp. 95-101 ◽  
Author(s):  
Y Luo ◽  
H Yin ◽  
C Hua
Keyword(s):  
Finite Element ◽  
Dynamic Response ◽  
Finite Element Model ◽  
Three Dimensional ◽  
Element Model ◽  
Railway Ballast ◽  
High Speeds ◽  
Dimensional Finite Element ◽  
Rail Irregularities ◽  
Three Dimensional Finite Element

To study the dynamic response of railway ballast excited by forces from the moving train at different speeds, a finite element model of track is developed. The rail is represented by a Timoshenko beam on discrete pad-sleeper-ballast supports. The ballast is considered as a three-dimensional finite element model. Wheel/rail irregularities and moving loads are taken into account. The displacement, acceleration and dynamic stress at different parts of the ballast are calculated. Vibration propagation is also presented. The responses of ballast, for constant loads and travelling at constant speeds over track with and without irregularity, are studied. It is shown that, at high speeds, stone may be projected out of the ballast bed.

Analysis of the Dynamic Response for Saturated Asphalt Pavement under Moving Vehicle Loads by Three-Dimensional Finite Element Method

2011 ◽  
Vol 97-98 ◽  
pp. 305-310
Author(s):  
Rui Bo Ren ◽  
Li Tao Geng ◽  
Wen Yang Qi
Keyword(s):  
Finite Element ◽  
Dynamic Response ◽  
Asphalt Pavement ◽  
Three Dimensional ◽  
Element Model ◽  
Temporal And Spatial Distribution ◽  
Moving Vehicle ◽  
Dimensional Finite Element ◽  
Vehicle Loads ◽  
Three Dimensional Finite Element

The dynamic response of saturated asphalt pavement subjected to moving vehicle load is studied. Based on the porous media theory, a three-dimensional finite element model is developed and the temporal and spatial distribution of three directional stresses and strains are calculated in saturated pavement and compared with those in dry condition. The results show obvious difference between saturated and dry asphalt pavement, especially in asphalt layer.

Study on Seismic Safety Analysis of Yi Minority Traditional Dwelling in Yunnan

2013 ◽  
Vol 368-370 ◽  
pp. 2021-2026
Author(s):  
Xin Le Li ◽  
Hui Juan Dou
Keyword(s):  
Dynamic Response ◽  
Response Curve ◽  
Three Dimensional ◽  
Element Model ◽  
Seismic Safety ◽  
Moment Resisting ◽  
Dimensional Finite Element ◽  
Design Characteristics ◽  
The Moment ◽  
Three Dimensional Finite Element

Based on Yunnan minority traditional structure, some structural design characteristics are summarized. The three-dimensional finite element model (FEM) of Yi minority dwelling is built.By studying the dynamic characteristics and earthquake responses of Yi minority dwelling,natural frequencies and periods,acceleration dynamic response curve and displacement dynamic response curve are obtained.The equations are applied to calculate the moment resisting capacity of Yi minority dwelling.Depending on the results,the flexible seismic advantages of timber structure for minority structure are verified under the design defense intensity.

Finite Element Analysis of Nonuniformity of Tires with Imperfections5

2007 ◽  
Vol 35 (3) ◽  
pp. 226-238 ◽  
Author(s):  
K. M. Jeong ◽  
K. W. Kim ◽  
H. G. Beom ◽  
J. U. Park
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Radial Force ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Dimensional Finite Element ◽  
Force Variation ◽  
Three Dimensional Finite Element

Abstract The effects of variations in stiffness and geometry on the nonuniformity of tires are investigated by using the finite element analysis. In order to evaluate tire uniformity, a three-dimensional finite element model of the tire with imperfections is developed. This paper considers how imperfections, such as variations in stiffness or geometry and run-out, contribute to detrimental effects on tire nonuniformity. It is found that the radial force variation of a tire with imperfections depends strongly on the geometrical variations of the tire.

scholarly journals Internal Force on and Deformation of Steel Assembled Supporting Structure of Foundation Pit under Thermal Stress

2021 ◽  
Vol 11 (5) ◽  
pp. 2225
Author(s):  
Fu Wang ◽  
Guijun Shi ◽  
Wenbo Zhai ◽  
Bin Li ◽  
Chao Zhang ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Bending Moment ◽  
High Strength ◽  
Element Model ◽  
Internal Force ◽  
Foundation Pit ◽  
Dimensional Finite Element ◽  
Influence Of Temperature On ◽  
Scale Experiment ◽  
Three Dimensional Finite Element

The steel assembled support structure of a foundation pit can be assembled easily with high strength and recycling value. Steel’s performance is significantly affected by the surrounding temperature due to its temperature sensitivity. Here, a full-scale experiment was conducted to study the influence of temperature on the internal force and deformation of supporting structures, and a three-dimensional finite element model was established for comparative analysis. The test results showed that under the temperature effect, the deformation of the central retaining pile was composed of rigid rotation and flexural deformation, while the adjacent pile of central retaining pile only experienced flexural deformation. The stress on the retaining pile crown changed little, while more stress accumulated at the bottom. Compared with the crown beam and waist beam 2, the stress on waist beam 1 was significantly affected by the temperature and increased by about 0.70 MPa/°C. Meanwhile, the stress of the rigid panel was greatly affected by the temperature, increasing 78% and 82% when the temperature increased by 15 °C on rigid panel 1 and rigid panel 2, respectively. The comparative simulation results indicated that the bending moment and shear strength of pile 1 were markedly affected by the temperature, but pile 2 and pile 3 were basically stable. Lastly, as the temperature varied, waist beam 2 had the largest change in the deflection, followed by waist beam 1; the crown beam experienced the smallest change in the deflection.

Process Modeling in Laser Deposition of Multilayer SS410 Steel

2007 ◽  
Vol 129 (6) ◽  
pp. 1028-1034 ◽  
Author(s):  
Liang Wang ◽  
Sergio Felicelli
Keyword(s):  
Phase Transformation ◽  
Temperature Distribution ◽  
Three Dimensional ◽  
Element Model ◽  
Traverse Speed ◽  
Processing Parameters ◽  
Dimensional Finite Element ◽  
Net Shaping ◽  
Three Dimensional Finite Element ◽  
Continuous Cooling Transformation Diagram

A three-dimensional finite element model was developed to predict the temperature distribution and phase transformation in deposited stainless steel 410 (SS410) during the Laser Engineered Net Shaping (LENS™) rapid fabrication process. The development of the model was carried out using the SYSWELD software package. The model calculates the evolution of temperature in the part during the fabrication of a SS410 plate. The metallurgical transformations are taken into account using the temperature-dependent material properties and the continuous cooling transformation diagram. The ferritic and martensitic transformation as well as austenitization and tempering of martensite are considered. The influence of processing parameters such as laser power and traverse speed on the phase transformation and the consequent hardness are analyzed. The potential presence of porosity due to lack of fusion is also discussed. The results show that the temperature distribution, the microstructure, and hardness in the final part depend significantly on the processing parameters.

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