Car Seat Backrest Static Strength Experiment and Simulation

2009 ◽  
Vol 16-19 ◽  
pp. 178-182 ◽  
Author(s):  
Zhi Wei Xu ◽  
Zhong Qi Sheng ◽  
Hong Hong Zhang ◽  
Yong Xian Liu
Keyword(s):  
Finite Element ◽  
Simulation Analysis ◽  
Model Simulation ◽  
Static Strength ◽  
Analysis Model ◽  
Element Analysis ◽  
Shell Elements ◽  
Car Seat ◽  
Model And Simulation ◽  
The Cost

According to the characteristics of car seat structure and the distribution of car seat load, the finite element static strength model of the car seat is constructed in this paper. The model contains shell elements and beam elements. Some seat structure elements such as welding connection, screw connection, pin connection are simplified in the model. Simulation analysis of the static characteristics of car seat backrest frame model is carried out. At the same time, the experimental research on the static strength characteristics of the back seat is made by the measurements of non-electric physical quantities. By comparing and analyzing the results of experiment and computer simulation of seat static strength, the practicability and credibility of the seat static finite element analysis model and simplified model constructed in this paper are verified. It also proves that the simulation of various connecting forms of the seat structure is effective and is a reliable method in the structural design of the car seat. The model and simulation of the car seat can reduce the cost and shorten the design period.

Numerical Simulation of Galloping for Iced Quad-Bundled Conductor

2014 ◽  
Vol 1025-1026 ◽  
pp. 955-958 ◽  
Author(s):  
Jun Jie Shi ◽  
Ya Nan Li ◽  
Li Qin
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Simulation Analysis ◽  
Time Integration ◽  
Vertical Vibration ◽  
Analysis Model ◽  
Element Analysis ◽  
Beam Elements ◽  
Time Integration Method ◽  
Wake Interference

The theoretical study of galloping can effectively promote anti-galloping techniques. Cable element is utilized to imitate the bundled conductor, and beam elements are used to simulated the spacers, established galloping finite element analysis model which can consider sub-conductors wake interference. The finite element equation was solved by time integration method and the calculation program was compiled by MATLAB. Through numerical simulation analysis, compared the dancing in the case of considering the effect of the sub-conductor wake and ignoring the effect of the sub-conductor wake. The results showed that considering the effect of the wake on aerodynamic loads has a greater vertical vibration amplitude. This method can provide reference for the study of prevention technology on dancing.

Numerical Simulation Analysis in Cooling Temperature Field and Bending Deformation after Rolling of 100-Meter Rail

2011 ◽  
Vol 121-126 ◽  
pp. 4523-4527
Author(s):  
Yu Yan Liu ◽  
Yan Wang ◽  
Lin Chen ◽  
Ge Li ◽  
Jian Guo Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Large Scale ◽  
Simulation Analysis ◽  
Analysis Model ◽  
Cooling Process ◽  
Element Analysis ◽  
Stress Variation ◽  
Finite Element Analysis Model ◽  
Bending Deformation

The paper established U75V 100-meter rail 3-D transient non-liner finite element analysis model about U75V 100-meter rail by using the large-scale non-liner finite element analysis software ABAQUS. By analyzing the different positions in the section of the temperature variation, the changes of bending degree and the residual stress variation after the bending deformation have changed. Based on the 100-meter straight rail in natural cooling under the cooling process, simulation results showed that in the cooling process, deflection change with time mainly divided into four stages; In consideration of the friction effect, the flat rail cold curve for its deformation among roughly flat, the curve about either ends, the scope for bending is 18 meters, the maximal displacement is 1.88 meters while the flat rail occured end colding.

scholarly journals A Study on the Influence of the Cross-Sectional Shape of the Metal-Inserted Retainer Ring and the Pressure Distribution from the Multi-Zone Carrier Head to Increase the Wafer Yield

2020 ◽  
Vol 10 (23) ◽  
pp. 8362
Author(s):  
Joon-Yeon Park ◽  
Je-Heon Han ◽  
Changwon Kim
Keyword(s):  
Finite Element ◽  
Pressure Distribution ◽  
Model Simulation ◽  
Removal Rate ◽  
Element Model ◽  
Analysis Model ◽  
Element Analysis ◽  
Cross Sectional ◽  
The Cross ◽  
Sectional Shape

In this paper, for the purpose of increasing the wafer yield by controlling the non-uniformity of the material removal rate during the chemical mechanical polishing process, the influence of the cross-sectional shape of the metal-inserted retainer ring and the pressure distribution on the wafer and the retainer ring generated from the multi-zone carrier head are investigated. First, in order to verify the finite element analysis model, it is correlated using the test data. By using a validated finite element model, simulation studies involving several parameters are performed to reduce the irregularity in the wafer: (1) tapered bottom of the retainer ring, (2) machining round corners at the bottom of the retainer ring, (3) the changes in pressure applied to the wafer, (4) the changes in pressure applied to the retainer ring.

scholarly journals Analysis of Tooth Surface Contact Stress of Involute Spur Gear

2021 ◽  
Vol 2133 (1) ◽  
pp. 012037
Author(s):  
Yusheng Zhai ◽  
Jie Mu ◽  
Ruiguang Yun ◽  
Siran Jia ◽  
Jianfeng En ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Contact Stress ◽  
Simulation Analysis ◽  
Spur Gear ◽  
Tooth Surface ◽  
Analysis Model ◽  
Element Analysis ◽  
Element Simulation ◽  
Surface Contact

Abstract Through the establishment of a pair of spur gear contact models, based on Hertz contact theory, the tooth surface contact stress is calculated; then the Ansys finite element analysis software is used to simulate and analyse the stress distribution. Through the analysis and comparison of the two results, it is proved that the contact stress calculated by Hertz theory is relatively small, which is close to the results of the finite element simulation analysis. Theoretical calculation can verify the accuracy of the finite element simulation analysis model, and the finite element simulation analysis provides an effective way to accurately calculate the contact stress of the tooth surface.

An Efficient Sampling Method for Regression-Based Polynomial Chaos Expansion

2013 ◽  
Vol 13 (4) ◽  
pp. 1173-1188 ◽  
Author(s):  
Samih Zein ◽  
Benoît Colson ◽  
François Glineur
Keyword(s):  
Finite Element ◽  
Design Of Experiments ◽  
Polynomial Chaos ◽  
Polynomial Chaos Expansion ◽  
Computational Time ◽  
Chaos Expansion ◽  
Analysis Model ◽  
Element Analysis ◽  
Analytical Functions ◽  
The Cost

AbstractThe polynomial chaos expansion (PCE) is an efficient numerical method for performing a reliability analysis. It relates the output of a nonlinear system with the uncertainty in its input parameters using a multidimensional polynomial approximation (the so-called PCE). Numerically, such an approximation can be obtained by using a regression method with a suitable design of experiments. The cost of this approximation depends on the size of the design of experiments. If the design of experiments is large and the system is modeled with a computationally expensive FEA (Finite Element Analysis) model, the PCE approximation becomes unfeasible. The aim of this work is to propose an algorithm that generates efficiently a design of experiments of a size defined by the user, in order to make the PCE approximation computationally feasible. It is an optimization algorithm that seeks to find the best design of experiments in the D-optimal sense for the PCE. This algorithm is a coupling between genetic algorithms and the Fedorov exchange algorithm. The efficiency of our approach in terms of accuracy and computational time reduction is compared with other existing methods in the case of analytical functions and finite element based functions.

Nonlinear Finite Element Analysis of Continuous Steel-Concrete Composite Beams

2014 ◽  
Vol 638-640 ◽  
pp. 159-162
Author(s):  
Liang Li Xiao ◽  
Ming Yang Pan ◽  
Jian Wei Han
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Simulation Analysis ◽  
Element Model ◽  
Composite Beams ◽  
Continuous Steel ◽  
Steel Beam ◽  
Analysis Model ◽  
Element Analysis ◽  
Nonlinear Numerical Simulation

According to the experimental data of steel beam for Honglu steel company continuous combination,a newer finite element model is presented.The model takes into account the effect by linear material,slip between concrete and steel beam and prestress as well.Five samples of steel-concrete composite beam are calculated with the model.and the stress, strain, crack propagation of nonlinear numerical simulation analysis is carried out , then the continuous composite cross in the load deflection curve of beams is obtained. As the calculation and analysis show that, the results of numerical analysis and experimental data are consistent with the analysis model. And the model is reasonable and effective.This study provides the basis for the application of continuous steel-concrete composite beams.

A Discussion about the Improvement of Finite Element Analysis Units of Castellated Beam

2012 ◽  
Vol 446-449 ◽  
pp. 648-651 ◽  
Author(s):  
De Bin Zhu ◽  
Xiao Jun Cao ◽  
Ya Shuang Bai ◽  
Qing Wen Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Curved Beams ◽  
Analysis Model ◽  
Element Analysis ◽  
Finite Element Analysis Model ◽  
Shell Elements ◽  
Shear Effects ◽  
Castellated Beam ◽  
External Loads

Castellated beam is a kind of holed web plate structural beam, since it has many advantages: savings in steel, light self-weight, resists bending and easy to deploy, the application of this structural beam becomes more and more widely. Due to its weakened web plate, castellated beam would be affected by shear effects greatly. The deformation of components increased under the affects of external loads. Therefore, in order to improve the accuracy of finite element analysis model, by consideration of the shearing effects and the bending stiffness affected under opened structure, this issue made improvement based on the theory of curved beams. By compare the results from this issue and the result from the analytical model of shell elements; we verify the feasibility of this method.

Modeling and experimental verification on directivity of an electret cell array loudspeaker

2012 ◽  
Vol 24 (3) ◽  
pp. 326-333 ◽  
Author(s):  
Yu-Chi Chen ◽  
Wen-Ching Ko ◽  
Han-Lung Chen ◽  
Hsu-Ching Liao ◽  
Wen-Jong Wu ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Digital Control System ◽  
Analysis Model ◽  
Cell Array ◽  
Element Analysis ◽  
Finite Element Analysis Model ◽  
The Finite Element Analysis ◽  
Directivity Characteristics

We propose a model to give us a method to investigate the characteristic three-dimensional directivity in an arbitrarily configured flexible electret-based loudspeaker. In recent years, novel electret loudspeakers have attracted much interest due to their being lightweight, paper thin, and possessing excellent mid- to high-frequency responses. Increasing or decreasing the directivity of an electret loudspeaker makes it excellent for adoption to many applications, especially for directing sound to a particular area or specific audio location. Herein, we detail a novel electret loudspeaker that possesses various directivities and is based on various structures of spacers instead of having to use multichannel amplifiers and a complicated digital control system. In order to study the directivity of an electret loudspeaker based on an array structure which can be adopted for various applications, the horizontal and vertical polar directivity characteristics as a function of frequency were simulated by a finite-element analysis model. To validate the finite-element analysis model, the beam pattern of the electret loudspeaker was measured in an anechoic room. Both the simulated and experimental results are detailed in this article to validate the various assertions related to the directivity of electret cell-based smart speakers.

Finite Element Analysis of Main Stand of Ф140 Pipe Rolling Mill and Split Casting

2013 ◽  
Vol 690-693 ◽  
pp. 2327-2330
Author(s):  
Ming Bo Han ◽  
Li Fei Sun
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Rolling Mill ◽  
Analysis Model ◽  
Element Analysis ◽  
Pipe Rolling ◽  
Full Load ◽  
Finite Element Software ◽  
Theoretical Position ◽  
Technical Requirements

By using finite element software, the paper establishes the main stand analysis model of the Ф140 pipe rolling mill and provides the model analysis of main stand in cases of full load. Verify the design of main stand fully comply with the technical requirements .In this paper, it provides the theoretical position of split casting and welding method using electric slag welding.

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