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The defense date of the thesis is 2010-08-11
The current date is 2019-04-19
URN etd-0811110-153148 Statistics This thesis had been viewed 1412 times. Download 0 times. Author Jia-hong Chen Author's Email Address No Public. Department Mechanical Engineering Year 2009 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 93 Title Optimum Design of Resonator With Absorbent Materail Keyword porous material mufflers genetic algorithm Optimal design Optimal design genetic algorithm mufflers porous material Abstract The purpose of this study analyzed the the acoustic properties of cavity resonance tube with porous materials. Using plane wave theory to infer its transfer matrix. The Sound wave propagation in the porous material is really complicated, for absorbent material, flow resistance is the most crucial factor. Adopting Allard’s theory, the present study solved the problem of sound wave propagation and flow resistance with coupling numerical method.
It shows that the theorem of transfer matrix is correct by comparing them with the previous literature before it was used to analyzed the performance of muffler. The main purpose of this study try to find out the improvement in silencer after putting porous material in resonators the expansion chamber. Using the optimal design of Genetic algorithm (GA), the best silencer performance was achieved.
The result indicated that there was a significant improvement in the performance of silencer after optimizing each design method of each muffler.
Advisor Committee Ying-chun Chang - advisor
Min-chie Chiu - co-chair
Shih-ping Liao - co-chair
Files Date of Defense 2010-07-23 Date of Submission 2010-08-11