Continuous systems: Forced-vibration response

2012 ◽  
pp. 827-854
Keyword(s):  
Forced Vibration ◽  
Vibration Response ◽  
Continuous Systems

Reduction of Forced Vibration Response by Optimum Balance of Linkage and Optimum Design of System

1997 ◽  
Author(s):  
She-min Zhang ◽  
Nobuyoshi Morita ◽  
Takao Torii
Keyword(s):  
Objective Function ◽  
Root Mean Square ◽  
Forced Vibration ◽  
Vibration Response ◽  
New Method ◽  
Mean Square ◽  
Design Variables ◽  
Calculation Results ◽  
Angular Velocities ◽  
Optimum Balance

Abstract This paper proposes a new method to reduce the forced vibration response of frame of linkage. It is that the root-mean-square (RMS) value of binary maximum (Bmax) of forced vibration response at a series of angular velocities is taken as the objective function, and the counterweight mass parameters of links and the stiffness factors are used as design variables. Then, it is found out that the responses are related not only to the Bmax value of shaking forces, but also to the shape of curve of shaking forces. The calculation results are compared with those of two other methods used in the reduction of forced vibration response by optimized balance of linkages, and it is shown that the new method can significantly reduce the responses of frame of linkage.

scholarly journals Simulation Analysis of Forced Vibration Response of Arch Dam.

1994 ◽  
pp. 203-212
Author(s):  
Minoru Ueda ◽  
Hiroaki Okuda ◽  
Hiroo Shiojiri ◽  
Choshiro Tamura
Keyword(s):  
Forced Vibration ◽  
Simulation Analysis ◽  
Vibration Response ◽  
Arch Dam

Coupling of Turbomachine Blade Vibrations Through the Rotor

1967 ◽  
Vol 89 (4) ◽  
pp. 502-512 ◽  
Author(s):  
J. T. Wagner
Keyword(s):  
Forced Vibration ◽  
Natural Frequencies ◽  
Vibration Response ◽  
Analytical Models ◽  
Finite Mass ◽  
Blade Vibration ◽  
Resonant Frequencies ◽  
Vibration Tests ◽  
Flexible Disk ◽  
Turbomachine Blade

The forced vibration response of subsystems with different natural frequencies and damping, attached to a foundation with finite stiffness or mass, is calculated. Analytical models include simulations of turbomachine blading on a flexible disk or on a rotor with finite mass. Coupling through the disk or rotor explains variations in resonant frequencies and amplitudes that have been observed in blade-vibration tests. Effects on damping measurements are also determined.

Vibration Response Analysis of a Stepped Beam with Crack Using Composite Element Method

2011 ◽  
Vol 199-200 ◽  
pp. 835-838
Author(s):  
Xu Bin Lu ◽  
Zhong Rong Lv ◽  
Ji Ke Liu
Keyword(s):  
Forced Vibration ◽  
Vibration Response ◽  
Dynamic Responses ◽  
Response Analysis ◽  
Crack Model ◽  
Composite Element ◽  
Stiffness Reduction ◽  
Stepped Beam ◽  
Composite Element Method ◽  
Element Method

The composite element method is utilized to discretise a stepped Euler-Bernoulli beam with a crack. The local stiffness reduction due to the crack is introduced by using a simplified crack model. The finite element equation for the forced vibration analysis is obtained using the composite element method (CEM). The forced vibration response of the cracked stepped beam is numerically calculated using Newmark integration method. Numerical results indicate that the position and depth of a crack affects the low and high natural frequencies and modes of a cantilever beam, respectively. And the position of the crack has significant effects on the dynamic responses of the beam.

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