Free Vibration Experiment in the Theory of Linear Viscoelasticity

1963 ◽  
Vol 34 (1) ◽  
pp. 21-25 ◽  
Author(s):  
Hershel Markovitz
Keyword(s):  
Free Vibration ◽  
Linear Viscoelasticity ◽  
Vibration Experiment

scholarly journals Simulasi Getaran Sistem Diskrit Satu Derajat Kebebasan

MESIN ◽  
2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Vega Amalia Eka Rizky ◽  
Muhammad Ganesha ◽  
Tono Sukarnoto ◽  
Soeharsono Soeharsono
Keyword(s):  
Free Vibration ◽  
Natural Frequency ◽  
Forced Vibration ◽  
Discrete System ◽  
Mechanical Vibration ◽  
Degree Of Freedom ◽  
Rigid Object ◽  
Resonance Frequencies ◽  
Vibration Experiment ◽  
Rigid Rod

<em>Equipment has been made to simulate a discrete system vibration of one degree of freedom. The aim is to obtain equipment for learning for students in the field of mechanical vibration. Vibration simulation includes free vibration and forced vibration of discrete system in one degree of freedom. The main parts of this equipment are rigid rods with mass of 2.6 kg, vibrators with mass of  3.385 kg, spring with stiffness of 3738 N/m and loading masses. A rigid rod of 0.775 m in length is supported by a hinge on one end and hung on a spring in another position. The vibrator is rotated by an electric motor and the rotation can be adjusted from 90-1600 rpm. The vibrator is mounted on a rigid object at the position of 0.285 m, 0.385 m, 0.485 m and 0.585 m from the hinge. A spring with stiffness of 3738 N/m is placed on a rigid object at the position of the hinge. The loading masses of 1.08 kg and 2.08 kg are mounted on a rigid beam in a row at the position of 0.685 m from the hinge. For the free vibration experiments, the natural frequency for each position of vibrator is searched experimentally and theoretically. It is found that the results of the two are similar. For the forced vibration experiments, graphs of vibrational responses are constructed in the frequency domain, then the resonance frequencies are compared to the natural frequency results from the free vibration experiment. Apparently the results are very close. This shows that the research equipment made is reliable and can be used as a student learning tool.</em>

Using phase field and third-order shear deformation theory to study the effect of cracks on free vibration of rectangular plates with varying thickness

2020 ◽  
Vol 71 (7) ◽  
pp. 853-867
Author(s):  
Phuc Pham Minh
Keyword(s):  
Free Vibration ◽  
Shear Deformation ◽  
Phase Field ◽  
Deformation Theory ◽  
Plate Thickness ◽  
Shear Deformation Theory ◽  
Rectangular Plates ◽  
Equilibrium Equations ◽  
Third Order ◽  
Free Vibration Frequency

The paper researches the free vibration of a rectangular plate with one or more cracks. The plate thickness varies along the x-axis with linear rules. Using Shi's third-order shear deformation theory and phase field theory to set up the equilibrium equations, which are solved by finite element methods. The frequency of free vibration plates is calculated and compared with the published articles, the agreement between the results is good. Then, the paper will examine the free vibration frequency of plate depending on the change of the plate thickness ratio, the length of cracks, the number of cracks, the location of cracks and different boundary conditions

Free vibration of pretwisted, cantilevered composite shallow conical shells

AIAA Journal ◽  
1997 ◽  
Vol 35 ◽  
pp. 327-333
Author(s):  
C. W. Lim ◽  
S. Kitipornchai ◽  
K. M. Liew
Keyword(s):  
Free Vibration ◽  
Conical Shells

Numerical Stability of GFEM Evaluation for Free Vibration Analysis in Trussed Structures

2017 ◽  
Author(s):  
Thamara Petroli ◽  
Marcos Arndt ◽  
Paulo de Oliveira Weinhardt ◽  
ROBERTO Dalledone Machado
Keyword(s):  
Free Vibration ◽  
Numerical Stability ◽  
Vibration Analysis ◽  
Free Vibration Analysis
Sign in / Sign up

Export Citation Format

Share Document