Results 21 to 30 of about 2,936,275 (293)

Low frequency damping of metal panels in ambient Air [PDF]

, 2008
Mathematical models of structural dynamics are widely used and applied in many branches of science and engineering and it has been argued that many of the shortfalls with these models are due to the fact that the physics of joint dynamics are not ...
Paul Cunningham (1251771), Aglietti, GS, Walker, S.J.I., Walker, SJI, S.J.I. Walker (7122401), G.S. Aglietti (7122404), Cunningham, P, Cunningham, P.R., Aglietti, G.S.   +8 more
core   +1 more source

Experimental study on influences of fines content and consolidation stress on shear modulus and damping ratio of saturated sand

Yantu gongcheng xuebao, 2017
The dynamic shear modulus and damping ratio are the two main parameters for describing the dynamic characteristics of soil. The tests on the saturated sand under isotropically consolidation by TSH-100 resonant column apparatus made by GCTS Instruments ...
BI Sheng , CHEN Guo-xing , ZHOU Zheng-long , WU Qi
doaj   +1 more source

On the interaction of exponential non-viscous damping with symmetric nonlinearities [PDF]

, 2008
This paper studies the interaction between non-viscous damping and nonlinearities for nonlinear oscillators with reflection symmetry. The non-viscous damping function is an exponential damping model which adds a decaying memory property to the damping ...
Wagg, DJ, Sieber, Jan, Sieber, J., Adhikari, S., Wagg, D.J., Adhikari, Sondipon, Wagg, D.   +6 more
core   +1 more source

Enhancing stability control of Phase-Locked loop in weak power grids

International Journal of Electrical Power & Energy Systems
This paper analyzes the factors affecting the stability of phase-locked loops (PLLs) in weak power grids. By establishing a PLL model in weak power grids, it is found that line impedance, grid frequency disturbances, and output power all have an impact ...
Andong Liu, Hongbo Cao, Jun Liu
doaj   +1 more source

Experimental Study on Long-term Dynamic and Mechanical Properties of Negative Temperature Fill Along Qinghai—Tibet Railway

工程科学与技术, 2023
In order to evaluate the stability of roadbed in frozen soil area, the dynamic shear modulus and damping ratio of fill along Qinghai—Tibet railway are analyzed by means of laboratory test and theoretical analysis.
Liang DONG, Changrui YAO, Shuang TIAN, Ke WANG, Yonghua SU   +4 more
doaj  

Research on Damping Characteristics of Interconnected Hydropneumatic Suspension considering the Effects of Hose and Check Valve

Shock and Vibration, 2021
The interconnected hydropneumatic suspension (ICHPS) has not only the nonlinear stiffness and damping of the independent hydropneumatic suspension (IDHPS) but also antiroll and antipitch functions.
Hongmin Zhang, Xin Fang
doaj   +1 more source

Study on Optimal Design of Grotto-Eave System with Cable Inerter Viscous Damper for Vibration Control

Buildings, 2022
In this paper, the mechanical model of grotto–eave system with cable inerter viscous damper (CIVD) is established, and the vibration control equations are established. Firstly, the stochastic response is carried out, and the optimization design of design
Jizhong Huang, Ruoyu Zhang, Qingyang Luo, Xiuwei Guo, Meigen Cao   +4 more
doaj   +1 more source

Parameters Influence of New Particle Damper-based Fastener on its Damping Ratio

Chengshi guidao jiaotong yanjiu
[Objective] Fastener stiffness and damping are important factors affecting rail system vibration and wheel-rail noise, especially the fastener damping can directly affects the high frequency attenuation rate of the rail structure (rail noise) and the ...
YAO Yuyang, HAN Jian, HE Yuanpeng, HUANG Yunhua   +3 more
doaj   +1 more source

Comparative Analysis of Viscous Damping Model and Hysteretic Damping Model

Applied Sciences, 2022
A damping model is one of the key factors in dynamic analysis. Viscous damping and hysteretic damping models are commonly used in structural damping models.
Qinglin Liu, Yali Wang, Panxu Sun, Dongwei Wang   +3 more
doaj   +1 more source

Estimation of the Damping Ratio of the Coupled System Based on the Damping Ratios of Two 1-Dof Systems

Journal of System Design and Dynamics, 2008
A number of different structures in industrial facilities are installed on supports. There is the case that the damage occurs by the coupled vibration. The response magnification is obtained from the modal natural frequency and the modal damping ratio of the coupled system in the seismic design.
WATANABE, Tetsuya, TOMODA, Akinori, TANAKA, Kihachiro   +2 more
openaire   +2 more sources