Exact(4)
The crack is presented as a set of spring damping elements of variable stiffness connecting two sections of the shaft.
(ii) A discrete point-spring model with local springs between adjacent points and non-local springs with distance-decaying stiffness connecting non-adjacent points.
The support stiffness, connecting structure stiffness and the phase and amount of rotor unbalance which affect rotor dynamic response significantly are "uncertain but bounded" parameters, in another word, the distributions of these parameters are unknown, but the intervals of uncertain parameters are always got easier.
In this model, m denotes a mass, k1 and k2 are linear stiffnesses, kc is the coupling stiffness connecting the two masses, and r1 and r2 are the viscous resistances.
Similar(56)
A number of studies have demonstrated that a simple model, consisting of a force-dependent active stiffness connected in series with a constant passive stiffness, is sufficient to characterize the SRS of individual muscles over the entire range of obtainable forces.
The load transfer conditions between the carbon nanotubes and the matrix are modeled using joint elements of changeable stiffness that connect the two materials, simulating the interfacial region.
Therefore, the increase of cell stiffness is connected with the development of a cortical cytoskeleton, the decrease of alpha-actinin-1 and the increase of alpha-actinin-4 in the protein membrane fraction.
The positive frequency shift of the system was used to estimate the stiffness of biomolecules connecting between the SMR and attached particles.
To comprehensively analyze dynamic characteristics of double beam system, the effect of gradient parameter, foundation parameters, axial loading and connecting stiffness on the frequency and buckling load is compared, and the influence of damping factor is also investigated.
Here, in each channel, (m_o) represents the impulsive mass, (m_{si}) is the convective mass and (k_{si}) is the total stiffness of springs connecting the convective mass with the channel structure.
The oscillator mass models a module connected to the disk and the spring models the connecting isolation stiffness.
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