Comparison between modal analysis and finite‐element modeling of a marimba bar

1999 ◽  
Vol 105 (2) ◽  
pp. 1125-1125 ◽  
Author(s):  
Antoine Chaigne ◽  
Ingolf Bork
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Modal Analysis ◽  
Element Modeling

Finite Element Modeling of Blade-Rotor System in Turbomachinery

2003 ◽  
Author(s):  
Y. N. Al-Nassar
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Modal Analysis ◽  
Rotor System ◽  
Disk System ◽  
Blade Vibration ◽  
Element Modeling ◽  
Disk Mode

Modal analysis of Blade-Disk system under the effect of bearing flexibility is investigated. The present study has considered soft to hard bearing flexibility. The main objective here is to read from the modal analysis results the frequencies that are carrying out some information on blade vibration. The modal analysis shows that that there are few frequencies that are changing with the change of bearing flexibility. These are shaft mode only, shaft-blade nature, disk mode only, disk-blade nature, and blade mode only. The shaft-blade modes are the ones of concern here.

Validation of density–elasticity relationships for finite element modeling of human pelvic bone by modal analysis

2013 ◽  
Vol 46 (15) ◽  
pp. 2667-2673 ◽  
Author(s):  
Roger Scholz ◽  
Falk Hoffmann ◽  
Sandra von Sachsen ◽  
Welf-Guntram Drossel ◽  
Carsten Klöhn ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Modal Analysis ◽  
Pelvic Bone ◽  
Element Modeling

The Tip/Tilp Mirror Modal Analysis Based on Flexible Connection of Equivalent Spring

2014 ◽  
Vol 697 ◽  
pp. 226-229
Author(s):  
Cai Ling Wang ◽  
Hong Wei Wang
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Modal Analysis ◽  
Detection System ◽  
Mirror System ◽  
Test Results ◽  
Element Analysis ◽  
Element Modeling ◽  
The Finite Element Analysis ◽  
Resonance Detection

According to flexible connectivity of space stabilization system,This paper proposes the finite element analysis method using multiple equivalent spring connecting unit to replace the original flexible connections. And the elastic coefficient’s correspondence between the equivalent spring and the original spring were deduced. Using the equivalent spring method, the tip/tilt mirror system for finite element modeling is completed, After completion of the modal analysis, first-order resonant frequency is calculated. At last, the tip/tilt mirror system is tested in non-contact laser resonance detection system, And test results and modal analysis results were compared, and results show that the finite element modeling method of using equivalent spring connecting is effective. Provide constructive reference for subsequent tip/tilt mirror design, has a very important reference for similar projects.

Application of modal analysis to the watermelon through finite element modeling for use in ripeness assessment

2014 ◽  
Vol 127 ◽  
pp. 80-84 ◽  
Author(s):  
Rouzbeh Abbaszadeh ◽  
Ali Rajabipour ◽  
Hassan Sadrnia ◽  
Mohammad J. Mahjoob ◽  
Mojtaba Delshad ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Modal Analysis ◽  
Element Modeling

Finite Element Modeling and Modal Analysis of Coilable Mast

2012 ◽  
Vol 226-228 ◽  
pp. 299-302
Author(s):  
Jie Wang ◽  
Dong Xu Li ◽  
Jian Ping Jiang
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Modal Analysis ◽  
Natural Frequencies ◽  
Space Mission ◽  
Joint Model ◽  
Finite Element Models ◽  
Attached Mass ◽  
Element Modeling ◽  
Tension Level

This paper investigates the modal characteristics of a coilable mast for space mission applications. Finite element models are established for characterizing the coilable mast. The simplification of joints between longerons and batten frames and the pre-tension in cables are carefully considered. A parametric modal analysis is performed with considering the following factors, the joint model in the truss, the pre-tension in cables, elements selected for longerons and battens, the mass attached to the top of the mast. Research results show that the natural frequencies of the coilable mast are sensitive to the selected elements and the attached mass. The pre-tension level in cables and the precision degree of the joint model have little effect on natural frequencies. The regularity expressed in the parametric modal analysis is useful for designers and engineers.

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