Results 1 to 10 of about 132 (128)
Interfacing Perforated Eardrums with Graphene-Based Membranes for Broadband Hearing Recovery. [PDF]
Adv Healthc Mater, 2022 Multilayered reduced graphene oxide membranes, offering a combination of exceptional mechanical strength, stiffness, light weight, and biocompatibility, are demonstrated to be a unique patching material to enable the closure of the perforated eardrum of rats and complete hearing restoration at both low and high frequencies. Abstract Eardrum perforation
Li C +10 more
europepmc +2 more sources
Evaluation of acoustic changes in and the healing outcomes of rat eardrums with pars tensa and pars flaccida perforations. [PDF]
Laryngoscope Investig Otolaryngol, 2022 Abstract Objectives To systematically explore the differences in acoustic changes and healing outcomes of tympanic membranes (TMs) with pars flaccida perforation (PFP) and pars tensa perforation (PTP). Methods We created PFPs and PTPs of various sizes in Sprague–Dawley rats, and evaluated TM umbo velocity and hearing function using laser Doppler ...
Liu Y +6 more
europepmc +2 more sources
Characteristics of Random Vibration of Mistuned Bladed Disk
Nippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C, 2011 It is known that, under appropriate conditions, the amplitude of vibration of some blades in the mistuned bladed disk system become large compared to what would be predicted by an analysis of the perfectly tuned system. In this paper, the rms responses of the mistuned bladed disk system subjected to random excitation with the spatial decorrelation and ...
Hiroki Takahara, Yutaka Nakano
exaly +4 more sources
IET Control Theory &Applications, Volume 17, Issue 14, Page 1955-1966, September 2023., 2023 A more general nonlinear model of the offshore structure with nonlinear energy sink mechanisms is established; a nonlinear energy sink‐based sliding mode controller is designed for the offshore structure. The designed observer‐based sliding mode controller can suppress the wave‐induced vibration of the structure effectively.
Wei Chen +4 more
wiley +1 more source
Vibration and flutter of mistuned bladed-disk assemblies [PDF]
25th Structures, Structural Dynamics and Materials Conference, 1984 An analytical model for investigating vibration and flutter of mistuned bladed disk assemblies is presented. This model accounts for elastic, inertial and aerodynamic coupling between bending and torsional motions of each individual blade, elastic and inertial couplings between the blades and the disk, and aerodynamic coupling among the blades.
K. RAO, V. KAZA
openaire +2 more sources
Influence of Fir‐Tree Tenon Blade Parameters on Blade Dynamic Characteristics
Shock and Vibration, Volume 2023, Issue 1, 2023., 2023 In this paper, based on the theory of elastic structure analysis, considering the rotational softening and centrifugal stiffening of the blade, the dynamic model of the fir‐tree rotating blade and the macroslip hysteresis model of the dry friction on the contact surface of fir‐tree tenon are established.
Zhenya Yang, Chaofeng Li, Dario Di Maio
wiley +1 more source
Structural Control and Health Monitoring, Volume 2023, Issue 1, 2023., 2023 Recently, enhancing conventional tuned mass dampers (TMDs) with a pounding damping mechanism is demonstrated to be an efficient way for vibration control of flexible structures. In this paper, a double‐tuned pendulum mass damper employing a pounding damping mechanism (DTPMD‐PD) is proposed.
Wenxi Wang +5 more
wiley +1 more source
Battery‐Free and Wireless Technologies for Cardiovascular Implantable Medical Devices
Advanced Materials Technologies, Volume 7, Issue 6, June 2022., 2022 This study approaches various power solutions for cardiovascular implants, from conventional batteries to state‐of‐the‐art energy harvesters and wireless power transfer (WPT) schemes. The advanced power solutions for cardiovascular implants in in vivo and in vitro experiments are illustrated throughout.
Jungang Zhang +5 more
wiley +1 more source
Mode localization in linear and periodically time‐varying mistuned wind rotor
Wind Energy, Volume 24, Issue 10, Page 1083-1094, October 2021., 2021 Abstract Rotor blades are the most important and most expensive part of a wind turbine; their dynamic behavior is of great significance for maintenance planning and safe operation. In this study, the effect of mistuning on the vibration modes of rotor blades was investigated, with a focus on the mode localization of linear time‐varying wind turbine ...
Xin Guo +3 more
wiley +1 more source
Active gyroscopic stabilizer to mitigate vibration in a multimegawatt wind turbine
Wind Energy, Volume 24, Issue 7, Page 720-736, July 2021., 2021 Abstract One of the main concerns in developing large wind turbines, especially offshore, is their cost‐effectiveness versus traditional power sources. Significant dynamic loads are applied to the tower and the foundation of a multimegawatt wind turbine.
Mehdi Soleymani, Mahdi Norouzi
wiley +1 more source