S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Mechanical Aerospace Engineering (기계항공공학부) Theses (Master's Degree_기계항공공학부)
Topology optimization of mechanical wave filter in curved beam structures
위상최적화를 이용한 굽음보 구조에서의 기계적 파동필터 설계
- 공과대학 기계항공공학부(멀티스케일 기계설계전공)
- Issue Date
- 서울대학교 대학원
- 학위논문 (석사)-- 서울대학교 대학원 : 기계항공공학부(멀티스케일 기계설계전공), 2013. 2. 김윤영.
- We carried out a design of a mechanical wave filter to reduce wave transmission in a curved beam structure. Filtering phenomenon of the wave transmission in specific frequency range may be seen at infinitely periodic elastic structures composed of different materials. In a curved beam, however, implementation of the periodic structure is very limited. The dimension of the curved region which connects two waveguides is generally not long enough to cover broad target frequency. The periodic structure repeated only in a few times cannot guarantee the performance of wave filtering in the curved beam. To overcome the difficulty, we formulated the design problem of the curved beam as a topology optimization problem. A curved region between two straight waveguides was considered as a design domain to minimize the power transmission of waves at target frequencies. Compared to a periodic curved structure, the designed ones by topology optimization show the improvement of the performance in reducing the wave transmission at the target frequencies.