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Huang Y.,Hunan Communication Polytechnic College
Applied Mechanics and Materials | Year: 2014

Based on wavelet transform of strain mode, the damage identification of plane frame was studied in this paper. After solving strain modal parameters of plane frames with cracks by means of the finite element theory, applying the gauss2 wavelet transform to analyze the stain mode of plane frame, and denoising the wavelet coefficients of the strain mode by db3 wavelet, the crack location of the plane frame could be identified by the maximum of wavelet coefficients after denoising. Taking one-story plane frame for example, three finite element models, including a frame beam with a crack, each frame column with a crack, and each frame beam and column with a crack, were set up separately, then the above-mentioned method was applied to identify the location of the crack. The results show the method is effective, and it may be useful in damage identification and diagnosis in structures. © (2014) Trans Tech Publications, Switzerland. Source


Mao L.,Hunan University | Mao L.,Hunan Communication Polytechnic College | Gong J.-K.,Hunan University | Liu G.-L.,Hunan University
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | Year: 2012

Simulation model on deterioration of three-way catalytic converter was obtained after combining deterioration mechanism and chemical reaction and revising chemical reaction with the average diameter of Pt and frequency factors. Model was verified by comparing the experimental results and the conversion efficiency of No and CO, and grey relational analysis was processed on the simulation results. The results show that the relational degree of excessive air coefficient, inlet temperature, divergence angle and mileage are greater than 0.5 and they are the main factors of deterioration performance of automotive three-way catalytic converter. Moreover, mileage is the most essential influencing factor, whose grey relational analysis can be applied to the analysis in affecting factors of the deterioration performance of automotive three-way catalytic converter. Source


Guan D.-Q.,Changsha University of Science and Technology | Huang Y.,Hunan Communication Polytechnic College
Jisuan Lixue Xuebao/Chinese Journal of Computational Mechanics | Year: 2010

Based on wavelet transform of strain mode, the damage identification of plane frame was studied in this paper. Solving strain modal parameters of plane frames with cracks by means of the finite element theory, applying the gauss2 wavelet transform to analyse the stain mode of plane frame, and denoising the wavelet coefficients of the strain mode by db3 wavelet, then the location of crack of the plane frame could be identified by the maximum of wavelet coefficients after denoising. Therefore, this method was proposed for damage identification of plane frames based on strain mode. Taking one-story plane frame for example, three finite element models, including a frame beam with a crack, each frame column with a crack, and each frame beam and column with a crack, were set up seperately, then the above-mentioned method was applied to identify the location of the crack. The results show that the method is effective, and it may be useful in damage identification and diagnosis in structures. Source


Jun-Tang L.,Hunan Electric Power Company | Wu Q.,Hunan University | Ouyang J.,Hunan Communication Polytechnic College
China International Conference on Electricity Distribution, CICED | Year: 2012

In accordance with the technique features of Active Power Filter control in harmonics suppression, e.g., time lag, non-linearity and frequent disturbance in work field, a fuzzy neural network predictive controller based on genetic algorithm is designed. By combining fuzzy control, neural network and predictive control, it can enhance self-studying, tracking and anti-interference capabilities of the algorithm, and the neural network can compensate with the limitation of conventional predictive control that based on linear model. With this algorithm the compensating current is controlled, and the simulation experimental curves show that the proposed method is more effective and feasible than PI control or digit adaptive control. © 2012 IEEE. Source


Liu Y.,Changsha University of Science and Technology | Liu Y.,Hunan Communication Polytechnic College | Yan D.-H.,Changsha University of Science and Technology
Advanced Materials Research | Year: 2011

This study focuses on test loading program and evaluation for pedestrian bridge. On the basis of the finite element analysis, numerical model of Lv River Bridge, which is a steel box pedestrian suspension bridge, is established. Moreover, field static load test is done and the results of tests are compared to the theoretical values. Results show that the measured result fits well with the theoretical result and bridge is in the situation of elastic deformation, and the strength and stiffness satisfy the need of design. © (2011) Trans Tech Publications. Source

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