Results 21 to 30 of about 154,153 (296)

RESEARCH ON DYNAMIC AND STATIC STIFFNESS CHARACTERISTICS OF MESH ELASTIC PAD

Jixie qiangdu, 2020
Elastic cushion plays an important role in alleviating the dynamic interaction between train and its running foundation. The ratio of static stiffness to dynamic stiffness is the key parameter to determine the alleviation performance of elastic cushion ...
ZHAO Feng, HE ZhenXing, SHI GuangTian, CHEN QingChao, ZHOU HuaLong, WANG BinCang   +5 more
doaj  

Analytical Calculation for Time-varying Mesh Stiffness of Articulated Supported Rack-Gear Based on Potential Energy Principle

Jixie chuandong, 2023
Gear-rack transmission is an important mechanical transmission mode and the time-varying mesh stiffness of gear-rack is one of the main excitation sources, which has an important effect on the vibration and noise level of the mechanical system.
Tang Liang, Chen Zaigang, Yang Jizhong, Chen Zhihui   +3 more
doaj  

Evaluation Of Mesh Stiffness and Torsional Rigidity in Spur Gear [PDF]

Engineering and Technology Journal, 2005
A This work aims to investigate the main parameters affecting noise and vibration encountered in spur gears . They are torsional mesh stiffness and transmission error through a complete cycl . FEM was used for the theoretical aspect of the work .
Intisar Hadi, Tallal AL - Dory, Adnan Dawood   +2 more
doaj   +1 more source

Effect of Different Combined Excitation on the Vibration Characteristics of Locomotive Gear Transmission

IEEE Access, 2023
With the continuous improvement of locomotive operating speed, increasing axle load and increasing traction power, the dynamic excitation of wheel-rail interface and gear pair interface have become more and more intense, directly affecting the ...
Tao Zhang, Xiaohui Dang, Yong He, Jianlong Xie, He Ma   +4 more
doaj   +1 more source

Forced vibrations of gearboxes with time dependent meshing stiffnesses [PDF]

PAMM, 2003
AbstractThe contribution presents the efficient method of the mathematical modelling of gearboxes with time dependent meshing stiffnesses. A gearbox is considered including a housing and an interior rotating shaft system with gears. Further the paper deals with an analysis of vibrations excited by the important sources of the internal excitation in ...
Hajžman, M., Zeman, V., Byrtus, M.
openaire   +1 more source

Design concepts for large antenna reflectors [PDF]

, 1981
A type of antenna reflector was studied in which a stiff structure is constructed to hold a membrane like reflector mesh in the correct position. An important basic restriction is that the mesh be controlled only by the structure and that no additional ...
Hedgepeth, J. M.
core   +1 more source

Hopfield Neural Networks for Online Constrained Parameter Estimation With Time‐Varying Dynamics and Disturbances

International Journal of Adaptive Control and Signal Processing, EarlyView.
This paper proposes two projector‐based Hopfield neural network (HNN) estimators for online, constrained parameter estimation under time‐varying data, additive disturbances, and slowly drifting physical parameters. The first is a constraint‐aware HNN that enforces linear equalities and inequalities (via slack neurons) and continuously tracks the ...
Miguel Pedro Silva
wiley   +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

Bistable Mechanisms 3D Printing for Mechanically Programmable Vibration Control

Advanced Engineering Materials, EarlyView.
This work introduces a 3D‐printed bistable mechanism integrated into tuned mass dampers (TMDs) for mechanically adaptive passive vibration suppression. Through optimized geometry, the bistable design provides adaptable vibration reduction across a broad range of scenarios, achieving effective vibration mitigation without complex controls or external ...
Ali Zolfagharian, Frédéric Demoly, Mohammad Lakhi, Bernard Rolfe, Mahdi Bodaghi   +4 more
wiley   +1 more source

Analytical Model of Gear Thermal Stiffness Based on the Potential Energy Method

Applied Sciences, 2023
Stiffness is the main internal excitation of gear system vibration and is the basis for studying the static and dynamic characteristics of the system. Based on the relationship between thermal stress and strain in plane strain theory and combined with ...
Yanbing He, Haibo Yang
doaj   +1 more source