Predict sound of vibrational objects and spectrum analysis with Matlab program

• Main Authors: Bo-Chin Chiou, 邱柏欽
• Other Authors: Wu-Yao Chiou
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/52703441551005753083

碩士 === 國立高雄應用科技大學 === 模具工程系 === 98 === This study is used the GUIDE tools of Matlab software to developed the Fourier transform analysis module which can be obtained Discrete Fourier Transform (DFT), Fast Fourier Transform (FFT), Inverse Discrete Fourier Transform (IDFT) , Inverse Fast Fourier Transform (IFFT) and the sound transformation technology. The experimental measured vibration signals will be converted by the GUIDE module to time-domain and frequency-domain, these results can be compared with the experimental analysis for the validity, as well as the sound transformation technology transferred time domain will be also developed by the Matlab software. First, the study process of the experimental measurement example is that two work pieces of mild steels and golf shaft are used. Firstly, the measured time-domain signals are analyzed by the GUIDE module developed by Matlab language, and from comparisons of results of spectrum are mostly coincide with the experimental measurements. Finally, the analyzed results are transferred by IDFT and IFFT to time-domain signals and the technique of sound transformation is successfully applied to simulate for an impact of body to send out true sound. It is hoped that all of study results can be provided for engineering reference and application. ANSYS simulation is the second ,it's draw a golf club model and time domain for transient structural analysis by ANSYS,this signal using DFT and FFT for vibration analysis,and than contrast with Siglab experimental vibration and sound.