Results 21 to 30 of about 195,542 (316)

Bending vibration measurement on rotors by laser vibrometry [PDF]

Optics Letters, 1996
A new technique is proposed for noncontact measurement of bending vibration directly from a rotating component. This notoriously difficult and previously unattained measurement is a further development of laser Doppler vibrometry. Simultaneously the technique provides an accurate measure of shaft torsional vibration in situations in which measurements ...
T, Miles, M, Lucas, S, Rothberg
openaire   +2 more sources

Nonlinear vibration characteristics of marine propulsion shafting under bending-longitudinal coupling effect

Zhongguo Jianchuan Yanjiu, 2019
[Objectives]The propulsion shafting system of large ships usually has the characteristics of long shafting, large span, and small slenderness ratio.
Xu Peng, Zou Donglin, Lü Fangrui, Ta Na, Rao Zhushi   +4 more
doaj   +1 more source

Buckling and vibration analysis of laminated composite plate/shell structures via a smoothed quadrilateral flat shell element with in-plane rotations [PDF]

, 2011
This paper presents buckling and free vibration analysis of composite plate/shell structures of various shapes, modulus ratios, span-to-thickness ratios, boundary conditions and lay-up sequences via a novel smoothed quadrilateral flat element.
Allman, Aydogu, Bathe, Chakrabarti, Choi, Darilmaz, Fares, Ferreira, H. Nguyen-Van, Hu, Huang, Hughes, Ibrahimbegovic, Jayasankar, Khdeir, Kim, Kumar, Leissa, Liew, Liew, Liew, Liew, Liew, Liew, Liew, Liew, Liew, Liu, Liu, Liu, Long, Matsunaga, Matsunaga, Mohamad, N. Mai-Duy, Nguyen-Van, Noor, Phan, Pimpinelli, Providas, Prusty, Reddy, Reddy, Reddy, Reddy, Sciuva, Striz, T. Tran-Cong, Taylor, Valchoutsis, W. Karunasena, Wang, Wang, Wu, Yang, Zhang, Zhen, Zienkiewicz   +57 more
core   +2 more sources

A Novel Well Drill Assisted with High-Frequency Vibration Using the Bending Mode

Sensors, 2018
It is important for companies to increase the efficiency of drilling as well as prolong the lifetime of the drilling tool. Since some previous investigations indicated that a superposition of well drilling with an additional vibration increases the ...
Xinda Qi, Weishan Chen, Yingxiang Liu, Xintian Tang, Shengjun Shi   +4 more
doaj   +1 more source

Vibration and buckling of thin-walled composite I-beams with arbitrary lay-ups under axial loads and end moments [PDF]

, 2013
A finite element model with seven degrees of freedom per node is developed to study vibration and buckling of thin-walled composite I-beams with arbitrary lay-ups under constant axial loads and equal end moments.
Banerjee J. R., Banerjee J. R., Bank L. C., Bleich F., Gjelsvik A., Jaehong Lee, Jones R.M., Joshi A., Joshi A., Kaya M., Kim N. I., Kim N. I., Kim N. I., Lee J., Lee J., Lee J., Leung A.Y. T., Leung A.Y. T., Leung A.Y. T., Leung A.Y. T., Li J., Li J., Machado S.P., Mohri F., Mohri F., Pavlovic R., Sapountzakis E. J., Sapountzakis E. J., Sapountzakis E. J., Thuc Phuong Vo, Timoshenko S., Timoshenko S., Vlasov V. Z., Voros G. M.   +33 more
core   +2 more sources

Nonlinear bending and vibration analyses of FG nanobeams considering thermal effects

Materials Research Express, 2020
Nonlinear bending and nonlinear free vibration analysis are presented for FG nanobeams based on physical neutral surface concept and high-order shear deformation beam theory with a von Kármán-type equations and including thermal effects.
Wubin Shan, Bangyan Li, Shigang Qin, Hu Mo   +3 more
doaj   +1 more source

Correction method for dynamic measurement with an optical lever AFM (Effects of ambient fluid and surface force)

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2023
Cantilever vibration in an optical lever AFM is theoretically analyzed considering the effect of surface force and ambient fluid. The surface force between the tip and the sample is modeled using a cantilever with a spring and damping added to the tip ...
Yuki HANAMITSU, Takumi ISHIKAWA, Hiroshige MATSUOKA   +2 more
doaj   +1 more source

Localization of transversal cracks in sandwich beams and evaluation of their severity [PDF]

, 2014
An algorithm to assess transversal cracks in composite structures based on natural frequency changes due to damage is proposed. The damage assessment is performed in two steps; first the crack location is found, and afterwards an evaluation of its ...
Abdel Wahab, Magd, Gillich, GR, Praisach, ZI, Vasile, O   +3 more
core   +3 more sources

A study on levitation performance improvement of bent flexible steel plate

Mechanical Engineering Journal, 2018
Levitation improvement of the bending levitation performance of thin steel plate was performed. First, the point of the steel plate where the vibration is predominantly generated was estimated using an ultrathin steel plate with a thickness of 0.18 mm ...
Hideaki KATO, Kazuki OGAWA, Makoto TADA, Yoshiho ODA, Xiaojun LIU, Ayato ENDO, Keigo IKEDA, Takayoshi NARITA   +7 more
doaj   +1 more source

Vibration change and crack propagation under bending vibration of aluminum alloy

Nihon Kikai Gakkai ronbunshu
In this study, aluminum alloy specimens were subjected to bending vibrations at different vibration frequencies near the first resonance frequency in order to investigate the vibration changes associated with crack propagation.
Junji SAKAMOTO, Naoya TADA, Takeshi UEMORI   +2 more
doaj   +1 more source