Complex Modal Analysis of Rotating Systems

1999 ◽  
Author(s):  
Charles L. Kessler ◽  
Jay H. Kim
Keyword(s):  
Modal Analysis ◽  
Rotating Systems ◽  
Complex Modal Analysis ◽  
Complex Modal

Complex Modal Analysis of Non-Self-Adjoint Hybrid Serpentine Belt Drive Systems

2000 ◽  
Vol 123 (2) ◽  
pp. 150-156 ◽  
Author(s):  
Lixin Zhang ◽  
Jean W. Zu ◽  
Zhichao Hou
Keyword(s):  
Modal Analysis ◽  
Closed Form ◽  
Closed Form Solution ◽  
Form Solution ◽  
Mode Shapes ◽  
Belt Drive ◽  
Serpentine Belt ◽  
Complex Modal Analysis ◽  
Drive Systems ◽  
Complex Modal

A linear damped hybrid (continuous/discrete components) model is developed in this paper to characterize the dynamic behavior of serpentine belt drive systems. Both internal material damping and external tensioner arm damping are considered. The complex modal analysis method is developed to perform dynamic analysis of linear non-self-adjoint hybrid serpentine belt-drive systems. The adjoint eigenfunctions are acquired in terms of the mode shapes of an auxiliary hybrid system. The closed-form characteristic equation of eigenvalues and the exact closed-form solution for dynamic response of the non-self-adjoint hybrid model are obtained. Numerical simulations are performed to demonstrate the method of analysis. It is shown that there exists an optimum damping value for each vibration mode at which vibration decays the fastest.

Calculating response spectral moments by complex modal analysis

1989 ◽  
Vol 5 (2) ◽  
pp. 159-166
Author(s):  
Fang Tong ◽  
Zhang Tianshu
Keyword(s):  
Modal Analysis ◽  
Spectral Moments ◽  
Complex Modal Analysis ◽  
Complex Modal

Complex modal analysis and coupled electromechanical simulation of energy harvesting piezoelectric laminated beams

2018 ◽  
Vol 233 (7) ◽  
pp. 2526-2537 ◽  
Author(s):  
Abdolreza Pasharavesh ◽  
MT Ahmadian ◽  
H Zohoor
Keyword(s):  
Energy Harvesting ◽  
Modal Analysis ◽  
Output Voltage ◽  
Exact Analytical Solution ◽  
Lateral Displacement ◽  
Coupled Analysis ◽  
System Response ◽  
Complex Modal Analysis ◽  
Tip Mass ◽  
Complex Modal

In this paper, coupled electromechanical behavior of a vibrational energy harvesting system composed of a unimorph piezoelectric laminated beam with a large attached tip mass is investigated. To achieve this goal, first the electromechanically coupled partial differential equations governing the lateral displacement and output voltage of the harvester are extracted through exploiting the Hamilton’s principle. Considering vibration damping due to mechanical to electrical energy conversion, a complex modal analysis is performed to extract the complex eigenfrequencies and eigenfunctions of the system. Furthermore, an exact analytical solution is presented for the system response to the harmonic base excitations, including output voltage and harvested power. To validate the analytical results, at the next step a finite element simulation is conducted through ABAQUS software. To perform a fully-coupled analysis which brings into account the effect of harvesting circuit, user subroutine User-defined Amplitude (UAMP) is utilized to calculate the voltage–current relation and impose the correct electrical charge on the electrodes in each step by monitoring the output voltage of the system at previous time increments. Results of both analytical and numerical simulations are compared for a Micro-Electro-Mechanical Systems (MEMS) harvester as a case study, where a very good agreement is observed between them.

Complex modal analysis of serpentine belt drives based on beam coupling model

2017 ◽  
Vol 116 ◽  
pp. 162-177 ◽  
Author(s):  
Yue Pan ◽  
Xiandong Liu ◽  
Yingchun Shan ◽  
Gang(Sheng) Chen
Keyword(s):  
Modal Analysis ◽  
Coupling Model ◽  
Belt Drives ◽  
Beam Coupling ◽  
Serpentine Belt ◽  
Complex Modal Analysis ◽  
Complex Modal

Complex modal analysis of rods with viscous damping devices

2014 ◽  
Vol 333 (7) ◽  
pp. 2130-2163 ◽  
Author(s):  
Natale Alati ◽  
Giuseppe Failla ◽  
Adolfo Santini
Keyword(s):  
Modal Analysis ◽  
Viscous Damping ◽  
Complex Modal Analysis ◽  
Complex Modal

Complex modal analysis of the movements of swimming fish propelled by body and/or caudal fin

Wave Motion ◽  
2018 ◽  
Vol 78 ◽  
pp. 83-97 ◽  
Author(s):  
Z. Cui ◽  
Z. Yang ◽  
L. Shen ◽  
H.Z. Jiang
Keyword(s):  
Modal Analysis ◽  
Caudal Fin ◽  
Complex Modal Analysis ◽  
Complex Modal
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