http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
전달 매트릭스를 이용한 풍력 터빈 블레이드의 회전속도에 따른 동특성 변화 해석
이정우(Jung woo Lee),신동호(Dong Ho Shin),오재응(Jae-Eung Oh),이정윤(Jung Yoon Lee) 한국소음진동공학회 2012 한국소음진동공학회 학술대회논문집 Vol.2012 No.4
The transfer matrix method is used to determine the dynamic characteristics(natural frequencies and mode shapes) by rotational speed of wind turbine blade. The problems treated on this study is coupled flapwise bending and chordwise bending of pre-twisted nonuniform wind turbine blade. The orthogonality relations that exist between the vibrational modes is derived and the algorithm for determination of the natural vibrational characteristics is suggested.
인가전류 세기와 CIP 성분비에 따른 MRE의 전단계수 측정(Ⅱ)
오재응(Jae-Eung Oh),윤지현(Ji-Hyun Yoon),정재은(Jae-Eun Jung),파와지(Noor Fawazi),이정윤(Jung-Youn Lee) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
MRE(Magneto-rheological Elastomer) is a material which shows reversible and various modulus in magnetic field. Comparing to conventional rubber vibration isolator, MREs are able to absorb broader frequency range of vibration. These characteristic phenomena result from the orientation of magnetic particle (i.e., chain-like formation) in rubber matrix. In this study, NR was used as a matrix in order to manufacture MREs. Magnetic reactive powder(MRP), having rapid magnetic reaction, was selected as a magnetic particle to give magnetic field reactive modulus. The mechanical properties of manufactured MREs were measured without the application of magnetic field. The results showed that the tensile property and resilience were decreased while the hardness was increased with the addition of CIP. The analysis of MR effect was carried out by FFT analyzer with various magnetic flux. As the addition of MRP and magnetic flux increased, increment of MR effect was observed.