Modal Analysis of Magnetic Suspended Control Moment Gyroscope

2011 ◽  
Vol 50-51 ◽  
pp. 59-62
Author(s):  
Wei Zhao ◽  
Li Bin Zhao ◽  
Jian Yu Zhang ◽  
Bang Cheng Han
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Finite Element Models ◽  
Analysis Software ◽  
Element Analysis ◽  
3D Finite Element ◽  
Control Moment Gyroscope ◽  
Control Moment ◽  
Numerical Predictions ◽  
Analysis Scheme

3D finite element models of magnetic suspended control moment gyroscope structure are established by general finite element analysis software. Initial modal analysis scheme of the MS-CMG structure, in which the frame and gyro-chamber are analyzed separately, is described. A new modal analysis scheme that the MS-CMG is analyzed as a whole structure is presented. The connection between the gyro-chamber and frame is realized by defining a revolution pairs. The numerical predictions from two modal analysis schemes show obvious difference. The new scheme is more reliable since it simulates the real wok status of MS-CMG.

Oyster Creek Nuclear Generating Station Containment Drywell Buckling Analysis

2010 ◽  
Author(s):  
Soo Bee Kok ◽  
Shu S. Tang ◽  
Francis H. Ku ◽  
Marcos L. Herrera ◽  
John F. O’Rourke ◽  
...  
Keyword(s):  
Finite Element ◽  
Structural Integrity ◽  
Three Dimensional ◽  
Buckling Analysis ◽  
Eigenvalues And Eigenvectors ◽  
Analysis Software ◽  
Element Analysis ◽  
3D Finite Element ◽  
Buckling Stability ◽  
Stability Limits

This article presents the overall methodology and the results of the three-dimensional (3D) finite element buckling analysis of the primary containment drywell shell at the Oyster Creek Nuclear Generating Station (Oyster Creek). The buckling stresses, eigenvalues, and eigenvectors are computed using ANSYS finite element analysis software [1], and the structural integrity of the drywell in terms of the buckling (stability) limits are based on the ASME B&PV Code Case N-284-1 [2].

scholarly journals Influence of Number of Implants and Attachment Type on Stress Distribution in Mandibular Implant-Retained Overdentures: Finite Element Analysis

2017 ◽  
Vol 5 (2) ◽  
pp. 244-249 ◽  
Author(s):  
Mohamed I. El-Anwar ◽  
Eman A. El-Taftazany ◽  
Hamdy A. Hamed ◽  
Mohamed A. Abd ElHay
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Finite Element Models ◽  
Oblique Angle ◽  
Element Analysis ◽  
3D Finite Element ◽  
Cad Cam ◽  
The Right ◽  
Molar Region

AIM: This study aimed to compare the stresses generated by using two or four root form dental implants supporting mandibular overdentures that were retained with ball and locator attachments.METHODS: Under ANSYS environment, four 3D finite element models were prepared. These models simulated complete overdentures supported by two or four implants with either ball or locator attachments as a connection mechanism. The models’ components were created by CAD/CAM package then were imported to ANSYS. Load of 100 N was applied at the right premolar/molar region vertically and at an oblique angle of 110° from lingual direction.RESULTS: Within the conditions of this research, in all cases, it was found that cortical and cancellous bone regions were the least to be stressed. Also, the ball attachment produced higher stresses.CONCLUSION: Caps deformation and stresses are negligible in cases of using locator attachment in comparison to ball attachments. This may indicate longer lifetime and less repair/maintenance operations in implant overdentures retained by locator attachments. Although the study revealed that bone was insensitive to a number of implants or attachment type, it may be recommended to use two implants in the canine region than using four, where the locator attachments were found to be better.

STUDY OF HOLLOW STEMMED HIP BONE FORMING

2017 ◽  
Vol 41 (4) ◽  
pp. 531-542 ◽  
Author(s):  
Dyi-Cheng Chen ◽  
Jheng-Guang Lin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Titanium Alloys ◽  
Effective Stress ◽  
Experimental Results ◽  
Analysis Software ◽  
Element Analysis ◽  
3D Finite Element ◽  
Friction Factors ◽  
Punch Load

This study investigated hollow stemmed hip forging for enhancing the biocompatibility of Ti-6AL-4V titanium alloys. Instead of using the expensive titanium billet, this study applied DEFORMTM 3D finite element analysis software to simulate and analyze stem forming with respect to different die temperatures, friction factors, punch types, forging velocities, and billet temperatures. On the basis of its shape, a punch can be classified as flat head, ladder shaped, spherical, and conical. These differences affect the effective stress and punch load after stem formation. The experiment parameters were determined using the Taguchi L16 (45) orthogonal table. Both the simulated and experimental results indicated that the error for the size of the bone stem was less than 2%.

Strength Design for Star Sprocket Based on ANSYS

2014 ◽  
Vol 635-637 ◽  
pp. 312-315
Author(s):  
Lin Hong ◽  
Ying Jie Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Modal Analysis ◽  
Natural Frequency ◽  
Dynamic Optimization ◽  
Natural Frequencies ◽  
Analysis Software ◽  
Optimization Analysis ◽  
Element Analysis ◽  
Chain Conveyor

A star sprocket is an important component of U-shaped slide chain conveyor, so it is particularly important to be analyzed. It conducts modal analysis of star sprocket by using large finite element analysis software, ANSYS, calculates natural frequencies of the first five and the corresponding modes and analyzes natural frequency affected by sprocket tooth thickness. The result provides basic theory for dynamic optimization analysis of U-shaped slide chain conveyor.

The Crash-Box Crashworthiness Design Based on RCAR Tests

2014 ◽  
Vol 971-973 ◽  
pp. 781-784
Author(s):  
Hong Lan Liu ◽  
Ning Hu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Finite Element Models ◽  
Performance Study ◽  
Analysis Software ◽  
Element Analysis ◽  
Test Standards ◽  
The Finite Element Analysis ◽  
Crashworthiness Design ◽  
Different Thickness

Based on the RCAR test standards, this paper analyzed the low-speed bumper tests regulations, proposed the design principles of the crash-box and identified the key parameters to evaluate the crashworthiness of the crash-box. This paper built the crash finite element models of the front bumper system, used the finite element analysis software LS-DYNA and HYPERWORKS to simulate the crashworthiness of the crash-box based on different thickness models and completed the performance study of the crash-box. The optimized crash-box has good crashworthiness and it will provide important guidance to the crash-box design.

Mechanical Properties Research of Planar K-Joint

2015 ◽  
Vol 1091 ◽  
pp. 83-87
Author(s):  
Xi Bing Hu ◽  
Fei Hua Yi ◽  
Da Long Zhang ◽  
Hui Mao
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Finite Element Models ◽  
Analysis Software ◽  
Joint Region ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Rotational Deformation ◽  
Increasing Load

The finite element models of the planar K-joint are established based on the finite element analysis software ANSYS. The bracing members are under the action of axial force and moment. Different rotational deformation values of the joint with different geometric parameters are reached with calculation and analysis. Results show that the deformation value approximate linearly increased with the increasing load of the bracing member. It also shows that the influence of the bracing member diameter and wall thickness is larger on rotational deformation values and the rotational deformation of the part of the K-joint is greatly influenced by the deformation of joint region.

Modal Analysis of 160KVA Dry-Type Transformer Based on ANSYS

2012 ◽  
Vol 229-231 ◽  
pp. 919-922
Author(s):  
Bao Dong Bai ◽  
Guo Hui Yang ◽  
Bing Yin Qu ◽  
Jian Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Modal Analysis ◽  
Noise Level ◽  
Natural Frequencies ◽  
Analysis Software ◽  
Element Analysis ◽  
The Core ◽  
The Finite Element Analysis ◽  
Simulation Results

In this paper, the modal analysis was carried out on the core and cavity of a 160KVA dry-type transformer based on the finite element analysis software of ANSYS. And the simulation results of the natural frequencies and modal shapes were obtained, which provided a theoretical guidance to the design of the transformer structure, and were meaningful to reduce the vibration and noise level of the transformer.

Finite Element Modal Analysis of Whole Structure of Spherical Grinder

2013 ◽  
Vol 677 ◽  
pp. 273-277
Author(s):  
Xiao Xin Gong ◽  
Qiang Lu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Modal Analysis ◽  
Element Model ◽  
Analysis Software ◽  
Element Analysis ◽  
Improvement Measure ◽  
The Finite Element Analysis ◽  
Improved Design ◽  
Ansys Workbench

In order to analyze vibration characteristics of whole structure of the spherical grinder, the finite element analysis software is applied to finite element modal analysis of the structure. 3D model of spherical grinder is established by Pro/ENGINEER software. Finite element model of spherical grinder is established in the finite element analysis software ANSYS Workbench. The previous 6-order inherent frequencies and the corresponding vibration modes are obtained through the finite element calculation. According to the vibration intensity distribution, the corresponding improvement measure is put forward. It provides theoretical basis for dynamic analysis and improved design of spherical grinder.

scholarly journals Finite Element Analysis of Orthodontic Relapse in Different Maxillary Arch Form

2021 ◽  
Author(s):  
Yuanyuan Li, MD ◽  
Yiting Shao, MD ◽  
Yansong Yu, MD ◽  
Yushan Ye, MD ◽  
Yingjuan Lu, PhD ◽  
...  
Keyword(s):  
Finite Element ◽  
Von Mises Stress ◽  
Dental Arch ◽  
Finite Element Models ◽  
Element Analysis ◽  
3D Finite Element ◽  
Arch Form ◽  
Arch Forms ◽  
Von Mises ◽  
Maxillary Arch

Background: Orthodontic relapse is fairly common; however, the mechanisms between relapse and the dental arch form remain unclear. The purpose of our study was to establish three-dimensional (3D) finite element models of different dental arch forms after orthodontic treatment and to analyze the states of different arches applied with various sagittal forces.Methods: By calculating the equations of different dental arch forms and combining them with a full maxillary arch (14 teeth), 3D finite element models of square, oval, and tapered dental arches were established; they were designed to be subjected to anterior lingual, posterior mesial, and combined forces, respectively.Results: The von Mises stress and displacement of teeth under different forces were calculated for each loading scenario. Under the different forcing scenarios, all incisors had irregularity trends, and the inclination and intrusion of the canines were increased, and the premolars had a tendency to buccal or lingual crown tipping or even intrusion in our study. The tapered arch was the most stable and had the smallest displacement and von Mises stress, followed by the ovoid arch; the most unstable arch was the square arch.Conclusions: To achieve a stable orthodontic effect, a tapered or ovoid arch, rather than a square arch, should be chosen as the final outcome of treatment.

Sign in / Sign up

Export Citation Format

Share Document