반응표면법을 이용한 진동-음향 연성계의 흡음제 최적배치

다국어 초록 (Multilingual Abstract)

Statistical optimum methodology of table of orthogonal array, ANOM, ANOVA and RSM are applied to formulate optimum allocation design with design variables, allocate positions of absorbing material and the objective function, average SPL of control volume in the specific control volume of coupled vibroacoustic model in the closed system. Structural natural frequency and acoustic natural frequency of cavity are analyzed by FEM in closed system. Using BEM, average SPL of specific control volume is calculated according to the condition before use absorbing material and after use it. The effect of noise reduction is showed 5.02 ㏈<SUB>RMS</SUB> by absorbing material locates at optimal position and minimum 1.83 ㏈<SUB>RMS</SUB> and maximum 3.47 ㏈<SUB>RMS</SUB> by the table of orthogonal array. Using ANOM, ANOVA and RSM, it is possible tor sensitivity analysis of design variable which presents allocation position of absorbing material applying average SPL of specific control volume in coupled vibroacoustic model to analyze quantitative statistical analysis. And the effectiveness of statistical optimum design is verified by the comparison which is coincide less than 0.01 % between optimum solution which is predicted by 2nd order approximation polynomial and analysis result of confirming experiment to verify.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 이론
• 3. 흡음제 부착 최적화
• 4. 결론
• 후기
• 참고문헌