.... The primary visual aspect of wiper performance is the residual fluid film thickness, but this also influences friction which in turn affects the wiper's vibration behaviour (auditory). There is hence a need to be able to predict the thickness of the residual film to assess any impacts it may have on the ADAS...

... Fig. 18 Interference press-fit experiment: (a) ordinary experimental platform photo, (b) experimental curve without vibration (c) experimental platform with vibration, and (d) experimental curve with vibration Interference press-fit experiment: (a) ordinary experimental platform photo, (b...

...Jichao Cao; Yongliang Zhou; Kai Zhang; Shuai Huang; Wenjun Li; Kai Feng In gas foil bearing (GFB) rotor systems, accurate vibration characterization is essential for optimizing the performance and stability of high-speed rotating machinery. This study presents a novel measurement method for rotor...

...Kun Hu; Mutellip Ahmat; Wei Qiu A coupled finite element and complex eigenvalue model was established to investigate thermo-mechanically induced vibration in T-slot dry gas seals during start-up and shutdown. The findings indicate that increasing thermal distortion tends to attenuate high-frequency...

... 27 03 2025 27 03 2025 25 04 2025 harmonic reducer lubrication fretting wear finite element simulation wear experiment abrasion boundary lubrication gears grease lubrication vibrations wear mechanisms National Natural Science Foundation of China 10.13039...

...: [email protected] Email: [email protected] Email: [email protected] Contributed by the Tribology Division of ASME for publication in the J ournal of T ribology . 01 11 2024 10 03 2025 12 03 2025 08 04 2025 vibrational friction dynamic energy balance...

... load capacity) and the critical frequency (vibration frequency) of the bearings. This study presents two fluid domain models: the first model depicts flow channels with annular grooves for air supply (annular grooved model), while the second model does not include annular grooves (nongrooved model...

... and vibration, with GB being the most sensitive. HGMBs exhibit superior startup stability, while zero-bias HGMBs and AMBs face challenges with increasing radial clearance. These findings highlight the importance of considering radial clearance effects and provide valuable insights for HGMB design, promoting...

... and surface quality. Aiming at these issues, the present study proposed a convolutional neural network (CNN)-long short-term memory (LSTM) hybrid deep neural network model that directly utilizes heterogeneous data including timely captured tool images, working conditions, vibration data, surface roughness...

...Hiroyuki Ohta; Shinya Hayashi; Soichiro Kato; Yutaka Igarashi This paper deals with effects of grease types on vibrations and acoustic emissions (AEs) of linear-guideway type recirculating ball bearings with a millimeter-sized artificial defect in the carriage. First, the vibration and AE of one...

... designs is investigated through experiments and analytical modeling. Nonlinear systems theory is used to highlight slider instabilities arising from an unfavorable coupling of system vibration modes through an internal resonance condition, as well as the favorable suppression of instabilities through...

...Frédéric Lévesque; Sylvain Goudreau; Louis Cloutier Aeolian vibrations represent a threat to the integrity of electrical transmission lines. The fretting fatigue of conductors is thus a major concern. The modelization of the contact conditions at critical points is an important tool in assessing...

... and outer race and balls were modeled through surface profile changes. Bearing load zones under various radial loads and clearances were simulated. The effects of type, size, and shape of faults on the vibration response in rolling element bearings and dynamics of contacts in the presence of localized...

... vibration. Numerical results show that the reduced damping coefficients and the threshold speed can be effectively enhanced by giving suitable pad pivot stiffness and damping simultaneously, and this analytical method can be applied to analyze dynamical behavior of the tilting-pad journal bearing rotor...

...M. S. Patil; Jose Mathew; P. K. Rajendrakumar; Sumit Karade The presence of defect in the bearing (outer race, inner race, or ball) results in increased vibrations. Time domain indices such as rms, crest factor, and kurtosis are some of the important parameters used to monitor the condition...

...Adolfo Delgado; Luis San Andrés Squeeze film dampers (SFDs) aid to reduce excessive vibration levels due to rotor imbalance and to raise stability thresholds in rotor-bearing systems. SFDs commonly include end seals to increase their damping capability with a lesser lubricant flow. Seals also aid...

...Du Chen; David B. Bogy Near or partial contact sliders are designed for the areal recording density of 1 Tbit / in. 2 or even higher in hard disk drives. The bouncing vibration of an air bearing-slider in near or partial contact with the disk is numerically analyzed using three different nonlinear...

...Hiroyuki Ohta; Kazuya Matsuura; Soichiro Kato; Yutaka Igarashi This paper deals with vibrations and acoustic emissions (AEs) of linear-guideway type recirculating ball bearings with a millimeter-sized artificial defect in the carriage. The vibration and AE of one normal bearing without a defect...

... characteristics of a squeeze-film gas bearing. This squeeze bearing for a noncontact moving table uses piezoelectric actuators as an ultrasonic vibrator to make the bearing surface vibrate at the ultrasonic resonant frequency of the bearing plate. The squeeze-film pressure is generated in the gap beneath...

... and the viscoelastic dampers added behind the FPTPGB pads delayed the onset of subsynchronous vibrations (from 43 krpm without damper to above 50 krpm with damper). Midrange subsynchronous vibrations of the destabilized system initiated at ∼ 20 krpm were suppressed by ∼ 25 krpm due to the stabilizing effect of rotor...