| Summary: | 碩士 === 國立成功大學 === 系統及船舶機電工程學系碩博士班 === 95 === In the present study, an innovation to find out the location of the noise in a system is explored. By using the Finite Element Method and Gauss Legendre Quadrature over a triangle, an innovation which is linear distribution source method has been developed. This innovation, coordinated with the technology of the measurement of acoustical holography, is able to draw up the sound pressure contour distribution maps of overall frequency and each dominant noise frequency. Also the main position of noise produced in the system can be determined.
In addition, this research had proven the linear distribution source method may overcome the error of predicting sound pressure within a prediction distance of the plane version of similar source method. Besides, it can reduce the effect of measuring error and improve the accuracy of the analysis.
Furthermore, comparison of error analysis between the similar source method and the linear distribution source method has also been made for three different sources and conditions. It has confirmed the feasibility of linear distribution source method.
|
|---|
