Mesh Technique for the Finite Element Simulation of Acoustic Fluid-Solid Coupled Analysis

2014 ◽  
Vol 555 ◽  
pp. 452-457
Author(s):  
Marian Bogdan Neagoe ◽  
Sorin Cănănău ◽  
Lucian Mândrea
Keyword(s):  
Finite Element ◽  
Frequency Response ◽  
Noise Level ◽  
Vibration Analysis ◽  
Fluid Model ◽  
Coupled Analysis ◽  
Vehicle Engineering ◽  
Element Simulation ◽  
Acoustic Fluid ◽  
Mesh Technique

Noise and vibration analysis has become thoroughly researched in vehicle engineering where is needed to keep the noise level low and affect the vehicle users. The analysis in the paper shows a frequency response study where we will determine the frequency response on a coupled structure-fluid model. The study will be made on a simplified “train wagon“ model to show in a better way the differences between a perfect coupled structure-fluid model and a non-conformal coupling. The analysis shows that the distribution of the nodes for the two cases influences the results.

Finite Element Simulation of Frequency Response of MEMS-Microphone

2018 ◽  
Vol 47 (3) ◽  
pp. 211-216 ◽  
Author(s):  
D. M. Grigor’ev ◽  
I. V. Godovitsyn ◽  
V. V. Amelichev ◽  
S. S. Generalov
Keyword(s):  
Finite Element ◽  
Frequency Response ◽  
Finite Element Simulation ◽  
Element Simulation ◽  
Mems Microphone

Vibration Analysis on Convey Paper Belt of Infeed Unit

2012 ◽  
Vol 262 ◽  
pp. 377-381
Author(s):  
Wei Cheng Bao ◽  
Hong Chen ◽  
Yan Mei Liang
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Vibration Analysis ◽  
Beam Theory ◽  
Model Analysis ◽  
Printing Press ◽  
Simulation Technology ◽  
Shape Distortion ◽  
Belt Speed ◽  
Element Simulation

The precondition of improve the printing press velocity is to maintain the minimum vibration of infeed unit within the range of press speed. Taking advantage of the equivalent relation between the formula of infinitesimal energy and the classic beam theory, the vibration of convey paper belt can be converted into the problem of the beam be stretched and be compressed, and then we utilize the finite element simulation technology to conduct model analysis for the convey paper belt. When the numerical of the belt speed gain ,both the vibration and shape distortion reach the maximum, as well as speed of the infeed unit will be influenced most.

scholarly journals Nonlinear oscillations of a sandwich plate with a 3D-printed honeycomb core

2021 ◽  
Vol 2021 (4) ◽  
pp. 104-117
Author(s):  
K.V. Avramov ◽  
◽  
B.V. Uspensky ◽  
I.I. Derevianko ◽  
◽  
...  
Keyword(s):  
Finite Element ◽  
Frequency Response ◽  
Finite Element Simulation ◽  
Sandwich Plate ◽  
Nonlinear Oscillations ◽  
Ritz Method ◽  
Forced Oscillations ◽  
Homogeneous Layer ◽  
Honeycomb Core ◽  
Element Simulation

A three-layer sandwich plate with a FDM-printed honeycomb core made of polycarbonate is considered. The upper and lower faces of the sandwich are made of a carbon fiber-reinforced composite. To study the response of the sandwich plate, the honeycomb core is replaced with a homogeneous layer with appropriate mechanical properties. To verify the honeycomb core model, a finite-element simulation of the representative volume of the core was performed using the ANSYS software package. A modification of the high-order shear theory is used to describe the structure dynamics. The assumed-mode method is used to simulate nonlinear forced oscillations of the plate. The Rayleigh–Ritz method is used to calculate the eigenfrequencies and eigenmodes of the plate, in which the displacement of the plate points during nonlinear oscillations are expanded. This technique allows one to obtain a finite-degree-of-freedom nonlinear dynamic system, which describes the oscillations of the plate. The frequency response of the system is calculated using the continuation approach applied to a two-point boundary value problem for nonlinear ordinary differential equations and the Floquet multiplier method, which allows one to determine the stability and bifurcations of periodic solutions. The resonance behavior of the system is analyzed using its frequency response. The proposed technique is used to analyze the forced oscillations of a square three-layer plate clamped along the contour. The results of the analysis of the free oscillations of the plate are compared with those of ANSYS finite-element simulation, and the convergence of the results with increasing number of basis functions is analyzed. The comparison shows that the results are in close agreement. The analysis of the forced oscillations shows that the plate executes essentially nonlinear oscillations with two saddle-node bifurcations in the frequency response curve, in which the periodic motion stability of the system changes. The nonlinear oscillations of the plate near the first fundamental resonance are mostly monoharmonic. They may be calculated using the describing function method.

scholarly journals Identification of Engine Inertia Parameters and System Dynamic Stiffness via In Situ Method

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Chuanyan Xu ◽  
Xun Gong ◽  
Lixue Meng ◽  
Aijuan Li
Keyword(s):  
Finite Element ◽  
Frequency Response ◽  
Dynamic Stiffness ◽  
System Dynamic ◽  
Response Functions ◽  
In Situ Method ◽  
Element Simulation ◽  
Good Consistency ◽  
Inertia Parameters

An in situ method is presented to identify ten engine inertia parameters and system dynamic stiffness from the frequency response functions. The ten engine inertia parameters and system dynamic stiffness are estimated from two distinct steps. The accuracy of the proposed technique is verified by finite element simulation, and then the generality is validated using an engine supported by a specially designed curved bar spring. The locations of the measure points on the results are also carefully investigated. The identification of system dynamic stiffness is validated comparing with the engine with an auxiliary plate, which shows good consistency with the results identified from the study.

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