Mechanics Analysis of Reinforcing Rib Structure in Aluminum Heating-Plate Automatic Casting System

2012 ◽  
Vol 538-541 ◽  
pp. 1755-1761
Author(s):  
Man Feng Gong ◽  
Zhong Li ◽  
Jue Dong
Keyword(s):  
Vibration Mode ◽  
Response Analysis ◽  
Vibration Modes ◽  
Maximum Deformation ◽  
Harmonic Response ◽  
Heating Plate ◽  
Casting System ◽  
Inherent Frequency ◽  
Rib Structure ◽  
Harmonic Response Analysis

Reinforcing rib structure in the aluminum heating-plate automatic casting system was modeled by ANSYS, the static and dynamical problems were studied. Deformation and stress were calculated by static analysis, the front ten orders inherent frequency, critical rotating-speed and vibration modes were analyzed by modal analysis technology, vibration amplitude responses were obtained by harmonic response analysis. The maximum deformation value of reinforcing rib structure was less than 2mm (irrespective of the structure self-weight); the maximum equivalent stress was about 64.8MPa. It showed that the reinforcing rib structure could effectively avoid the resonance region, and the maximum vibration mode according to its inherent frequency appeared at the edge of the structure, some vibration modes were orthogonal, the main vibration modes appeared in the forms of bending, torsion, but the stretching vibration mode was scarce. The low orders inherent frequency greatly effected more than the high orders inherent frequency by harmonic response analysis, and the maximum deformation value was 25μm in low order vibrations. The conclusion is that the reinforcing rib structure fulfills design requirements and operates softly.

The Analysis on Different Circular Saw Structures for Reducing Saw Noise

2010 ◽  
Vol 145 ◽  
pp. 551-556
Author(s):  
Xiao Ling Wang ◽  
Yong Zhang
Keyword(s):  
Noise Level ◽  
Natural Frequencies ◽  
Vibration Mode ◽  
Mode Analysis ◽  
Response Analysis ◽  
Vibration Modes ◽  
Harmonic Response ◽  
Circular Saw ◽  
Harmonic Response Analysis ◽  
Circular Saws

In this paper, we carry out dynamic theoretical and numerical simulation on several differently designed structures of circular saw. Our goal is to improve the vibration property and reduce the noise level of circular saws. We obtain natural frequencies and vibration modes of differently designed saw structures by vibration mode analysis and harmonic response analysis. From our analytical results we prove the effectiveness of these differently designed circular saw structures in reducing the vibration and the noise level.

Finite Element Analysis of a Wind-Solar Hybrid Powered Street Light

2013 ◽  
Vol 365-366 ◽  
pp. 201-205
Author(s):  
Xiang Xu ◽  
Wei Wang ◽  
Ping Ping Fan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Vibration Mode ◽  
Response Analysis ◽  
High Wind ◽  
Element Analysis ◽  
Complex Load ◽  
Maximum Deformation ◽  
Harmonic Response ◽  
Harmonic Response Analysis

A finite elementmodel of a 9-meter-high wind-solar hybrid powered street light was established;statics analysis, modal analysis and harmonic response analysis were performedusing ANSYS. Static analysis determined the maximum deformation and stress of astreet light under complex load, and checked its intensity and rigidity. Modalanalysis and harmonic response analysis obtained a vibration mode of a streetlight and its natural frequency of every order. The results of analysesprovided references for the optimization of street light structure.

The Seismic Research of Connection with Haunch Frame

2013 ◽  
Vol 671-674 ◽  
pp. 1471-1474
Author(s):  
Li Yun Jiang ◽  
Xu Dong Sun
Keyword(s):  
Modal Analysis ◽  
Natural Frequency ◽  
Steel Structure ◽  
Model Analysis ◽  
Steel Frame ◽  
Response Analysis ◽  
Vibration Modes ◽  
Harmonic Response ◽  
Harmonic Response Analysis ◽  
Train Of Thought

In some accidents of earthquake, the steel frame was brittle damaged. The problem lied in the hinge part of the structure—beam-to-column connection. This made some academicians point out connection with haunch. In this article, the modal analysis and harmonic response analysis of frame are made at the basis of connection with haunch by using ANSYS. Through the model analysis, the natural frequency and relative vibration modes of the structure are gotten, which can help us prevent the frame from resonance, the harmonic response analysis is made based on the model analysis, the curve between the frequency and the deformation of each layer is drawn, from which we can also know the peak. The method used in the article can provide a train of thought about how to deal with complexly giant steel structure, and also lay the foundation for further research.

Dynamic Analysis of DVG 850 High-Speed Machining Center

2012 ◽  
Vol 487 ◽  
pp. 203-207
Author(s):  
Gong Xue Zhang ◽  
Xiao Kai Shen
Keyword(s):  
High Speed ◽  
Simulation Analysis ◽  
Response Analysis ◽  
Improved Method ◽  
Analysis Software ◽  
Element Analysis ◽  
Harmonic Response ◽  
Machining Center ◽  
Calculation Results ◽  
Harmonic Response Analysis

Purpose, with the application of workbench finite element analysis software, get the analysis results of DVG 850 high-speed vertical machining center via the modal analysis and harmonic response analysis. Use the calculation results for reference, put forward the improved method, and prove the credibility of the simulation analysis by testing DVG 850 prototype.

Harmonic Responses of Blades with Piezoelectric or Piezomagnetic Coatings

2013 ◽  
Vol 706-708 ◽  
pp. 1782-1785
Author(s):  
Jiao Wang ◽  
Ya Shu Li ◽  
Yun Dong Sha ◽  
Qing Kai Han
Keyword(s):  
Vibration Amplitude ◽  
Compressor Blade ◽  
Hard Coatings ◽  
Response Analysis ◽  
Harmonic Response ◽  
Successful Prediction ◽  
Vibration Fatigue ◽  
Harmonic Response Analysis ◽  
Piezomagnetic Effects ◽  
Natural Characteristics

A successful prediction that whether a compressor blade is able to overcome the resonance fatigue and fatigue life of forced vibration is based on its harmonic response analysis.Hard coatings with metal or ceramic substrate are effective to change the natural characteristics and vibration amplitude of a compressor blade so that to improve the anti-vibration fatigue capability. In this paper, modal analysis and harmonic response analysis based on the finite element method are achieved to investigate the contributions of the two different hard coatings on the natural characteristics and vibration amplitude of a compressor blade. The two kinds of hard coatings are modeled by both anisotropic materials and involving their piezoelectric or piezomagnetic effects. The blade is modeled as an isotropic one. The natural frequencies and vibration amplitude of blade with different coating thickness are numerically calculated and compared. Results show that the hard coatings with different thickness play an important role in the natural characteristics and harmonic response analysis of the blade.

scholarly journals Design optimization of vehicle asynchronous motors based on fractional harmonic response analysis

2021 ◽  
Vol 12 (1) ◽  
pp. 689-700
Author(s):  
Ao Lei ◽  
Chuan-Xue Song ◽  
Yu-Long Lei ◽  
Yao Fu
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Natural Frequency ◽  
Asynchronous Motor ◽  
Element Model ◽  
Design Parameters ◽  
Response Analysis ◽  
Harmonic Response ◽  
First Order ◽  
Harmonic Response Analysis

Abstract. To make vehicles more reliable and efficient, many researchers have tried to improve the rotor performance. Although certain achievements have been made, the previous finite element model did not reflect the historical process of the motor rotor well, and the rigidity and mass in rotor optimization are less discussed together. This paper firstly introduces fractional order into a finite element model to conduct the harmonic response analysis. Then, we propose an optimal design framework of a rotor. In the framework, objective functions of rigidity and mass are defined, and the relationship between high rigidity and the first-order frequency is discussed. In order to find the optimal values, an accelerated optimization method based on response surface (ARSO) is proposed to find the suitable design parameters of rigidity and mass. Because the higher rigidity can be transformed into the first-order natural frequency by objective function, this paper analyzes the first-order frequency and mass of a motor rotor in the experiment. The results proved that not only is the fractional model effective, but also the ARSO can optimize the rotor structure. The first-order natural frequency of asynchronous motor rotor is increased by 11.2 %, and the mass is reduced by 13.8 %, which can realize high stiffness and light mass of asynchronous motor rotors.

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