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Your search keyword '"Wang, Jiao"' showing total 40 results
Start Over Author "Wang, Jiao" Journal advanced materials research
40 results on '"Wang, Jiao"'

1. Dynamic Analysis of Nonlinear Anti-Resonance Vibration Machine Based on General Finite Element Method

Author

Jie Liu, Chun Wang Jiao, and Qian Qian Wang

Subjects
Vibration, Nonlinear system, Engineering, Amplitude, Control theory, Resonance vibration, business.industry, Spring (device), Nonlinear resonance, Frequency ratio, General Engineering, business, Finite element method
Abstract

The operation principle of anti-resonance vibration machine was analyzed. The dynamic model of anti-resonance vibration machine with nonlinear spring was established. A new method for solving nonlinear equation based on general finite element method was put forward, the solution was compared with numerical solution, the validity of the solving method was validated. Then the affection of nonlinear and dynamics parameters to the amplitude stabilization was analyzed. the conclusion can be drown as: when the anti-resonance frequency ratio is 1~2,increase the nonlinear of spring can improve the amplitude stabilization, when the anti-resonance ratio is bigger than 3,there is less affection to the amplitude stabilization by nonlinear of spring. The amplitude stabilization can be improved by increasing anti-resonance frequency ratio.

Published
2012

2. Vibration Analysis and Optimal Design for Cab’s Isolation System of Vibratory Roller

Author

Jianrun Zhang, Yuan Wang, Le Van Quynh, Xiaobo Liu, and Guo Wang Jiao

Subjects
Optimal design, Engineering, business.industry, Slosh dynamics, Modal analysis, Isolator, General Engineering, Structural engineering, Finite element method, Vibration, Vibration isolation, Control theory, business, Dynamic testing
Abstract

In recent years, vibration roller market has required increasingly not only on working capacity but also ride comfort. Thus, in order to reduce the effect of vibration to operators, identification and elimination of vibration sources are the most important tasks to achieve optimum design. In this paper, the attention is paid to cab’s low-frequency sloshing analysis and optimal design for cab’s isolation system of vibratory roller. When working, it often exists the problem of cab’s low-frequency sloshing in the direction of forward motion. In order to solve this problem, the dynamic test and simulations analysis are carried out; and the main reasons causing cab’s low-frequency sloshing are found out. The optimization model according to the two points response amplitude in the direction of forward motion on the cab to reach the minimum value in the low frequency range is proposed in this paper. And also, the auxiliary vibrations isolator for solving the low-frequency sloshing in the direction of forward motion is designed.

Published
2011

3. Parameter Simulation for Quenching and Pre-Stretching about Aluminum Alloy Thick Plates Based on MARC Finite Element

Author

Yun Xin Wu and Wang Jiao Yuan

Subjects
Diffraction, Quenching, business.industry, Alloy, General Engineering, Process (computing), chemistry.chemical_element, Mechanics, Structural engineering, engineering.material, Finite element method, chemistry, Aluminium, Residual stress, Parametric model, engineering, business
Abstract

To predict the three-dimensional residual stress distribution of 7075 aluminum alloy thick plates, the quenching and pre-stretching process were simulated by using MARC finite element software. In order to simulate quickly according to different reality conditions, the parametric model was realized by using defining parameters and selecting objects by inputting coordinate value with the box mode. In the quenching process, a non-linear thermo-mechanical direct coupled analysis of the aluminum alloy thick plates was carried out, by taking into account of the temperature dependence of the thermo-physical properties. In the pre-stretching process, the clamp and release of the clamp of pre-stretch machine were simulated by using life and death element technology. The study demonstrates that the theoretical predictions agree well with the experimental values of residual stresses measured by the X-ray diffraction method. The simulation results provide the user a tool for analyzing and studying on quenching and pre-stretching technique using virtual reality method.

Published
2010

40. Preparation and Characterization of TiO2 Photocatalytic Thin Film Prepared by Sol-Gel Dip Coating

Author

Wang, Jiao Jiao, Zheng, Kai, Rüssel, Christian, and Liang, Wen

Abstract

Titanium dioxide thin films have been prepared from tetrabutyl-orthotitanate solution and methanol as a solvent by sol-gel dip coating technique. The thermal properties of TiO2 gel were analyzed by thermogravimetry and differential thermal analysis (TG-DTA). Structural properties of TiO2 thin films at different heat treatment temperatures were analyzed by X-ray diffraction (XRD), Infrared Raman spectroscopy and scanning electron microscopy (SEM). The results show that the TiO2 thin films crystallize in anatase phase at 400 ˚C and the crystallinity of anatase phase was improved with increasing temperature. The TiO2 thin films crystallize into the anatase-rutile phase at 600 ˚C and further into the rutile phase at 800 ˚C. The photocatalytic performance of TiO2 film was tested for the degradation of 2×10-5 mol/L Rhodamine B. The degradation of Rhodamine B solutions reached 0.9×10-5 mol/L after irradiated for 8 h under UV light. The TiO2 thin film exhibited relatively high photocatalytic activity towards degrading Rhodamine B.

Published
2012
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