Results 301 to 310 of about 283,093 (346)
Some of the next articles are maybe not open access.
Study of Damped Critical Speeds and Damping Ratios of Flexible Rotors
Journal of Vibration and Acoustics, 1984Influences of bearing damping on critical speeds of flexible rotors are investigated. First, the damped critical speed and the damping ratio of a uniform shaft supported at both ends are examined. It is shown that there exists an optimum bearing damping that gives the maximum damping ratio for each order of critical speed, and that with increasing ...
Shinobu Saito, Tsuneo Someya
openaire +1 more source
Stroke Work Damping Ratio is Increased in Trained Athletes
2021 43rd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), 2021Athletes training is often associated with morphological changes in the heart. In this sense, the ventricular pressure-volume (PV) relation provides a complete characterization of cardiac pump performance. Regarding the arterial system (AS), arterial wall viscosity is a source of energy dissipation, that takes place during mechanical transduction. Left
L, Lemes Coitinho +8 more
openaire +2 more sources
Uniform Damping Ratio For Non-Classically Damped Hybrid Steel Concrete Structures
International Journal of Civil Engineering, 2016Steel–concrete hybrid systems are used in buildings, in which a steel structure has been placed on a concrete structure to make a lighter structure and have a faster construction. Dynamic analysis of hybrid structures is usually a complex procedure due to various dynamic characteristics of each part, i.e., stiffness, mass and especially damping ...
Abbas Sivandi-Pour +2 more
openaire +1 more source
Increasing Damping Ratios in a Tuned Liquid Damper Using Damping Bars
Key Engineering Materials, 2007Wind-induced vibration of tall buildings have been of interest in engineering for a long time. Wind-induced vibration of a tall building can be most effectively controlled by using passive control devices. The tuned liquid damper(TLD) is kind of a passive mechanical damper, which relies on the sloshing liquid in a rigid tank.
Ki Pyo You +3 more
openaire +1 more source
Damping ratio of polynomials with perturbed coefficients
IEEE Transactions on Automatic Control, 1988Let a family of polynomials be (1) \(P(s)=t_ 0s^ n+t_ 1s^{n- 1}+...+t_ n\) where ...
Soh, C. B., Berger, C. S.
openaire +2 more sources
Constant gain stabilization with a specified damping ratio and damped natural frequency
IFAC Proceedings Volumes, 1999Abstract This paper considers the problem of stabilizing a given linear time-invariant plant with a specified damping ratio and damped natural frequency using a constant gain compensator. We show the problem to be solved can be decomposed into two sub-problems.
Ming-Tzu Ho +2 more
openaire +1 more source
A time-domain viscous damping model based on frequency-dependent damping ratios
Soil Dynamics and Earthquake Engineering, 2000Abstract This paper introduces the mathematics and procedures used in developing a time-dependent damping model for integration analyses of structural response. To establish the time-dependent viscous damping model, frequency-dependent damping ratios of the structure under a series of steady-state unit impulses corresponding to actual loads are first
Der-Wen Chang, J.M Roesset, Chan-Hua Wen
openaire +1 more source
Equivalent uniform damping ratios for linear irregularly damped concrete/steel mixed structures
Soil Dynamics and Earthquake Engineering, 2011Abstract Structures consisting of two parts, a lower part made of concrete and an upper part made of steel are investigated. In code-based seismic design of such structures several practical difficulties are encountered, due to inherent differences in the nature of dynamic response of each part.
A.V. Papageorgiou, C.J. Gantes
openaire +1 more source
Strain-Dependent Damping Ratio of Compacted Gravel
2015Compacted gravel is often used as engineered fill to provide required bearing capacity for structures. The dynamic properties of the gravel fill, such as strain-dependent shear modulus and material damping ratio, are required in seismic analyses of these systems.
Liao Tianfei +4 more
openaire +1 more source
Estimation of modal damping ratio of impact-damped flexible beams using ANFIS
Neural Computing and Applications, 2012This paper presents the development of adaptive neuro-fuzzy inference systems (ANFIS) model for estimating the modal damping ratio of impact-damped flexible beams. The experimental results obtained from the literature are used as training and testing data for developing the model. Five of six parameters namely the gap, mass, modal amplitude, frequency,
openaire +2 more sources