한국농업기계학회:학술대회논문집 (Proceedings of the Korean Society for Agricultural Machinery Conference)
- 한국농업기계학회 2001년도 동계 학술대회 논문집
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- Pages.292-309
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- 2001
구기자 가지의 진동 특성
Vibration Characteristics of Boxthorn (Lycium Chinense Mill) Branch
- 발행 : 2001.02.01
초록
Modulus of elasticity, modulus of rigidity, damping ratio, and natural frequency of three varieties of boxthorn(Lycium chinense Mill) (Cheongyang #2, Cheongyang gugija, and Cheongyang native) branches were analyzed. Modulus of elasticity and modulus of rigidity of the boxthorn branch was determined using standard formula after simple beam bending and torsion test, respectively, using an universal testing machine. Damping ratio and natural frequency of branches were determined using a system consisted of an accelerometer, a PC equipped with A/D converter, and a software for data analysis. Relationship between the elastic modulus and branch diameter in overall varieties and branch types showed a good correlation (r