Comparison Analysis of Piezoelectric Vibration Control Methods for Autobody Thin-Wall Structure

2013 ◽  
Vol 376 ◽  
pp. 411-416 ◽  
Author(s):  
Chuan Liang Shen ◽  
Xiao Wen An ◽  
Ye Han ◽  
Da Xue Wang
Keyword(s):  
Finite Element ◽  
Vibration Control ◽  
Control Variable ◽  
Wall Structure ◽  
Thin Wall ◽  
Control Methods ◽  
Proportional Control ◽  
Piezoelectric Elements ◽  
Modal Space ◽  
Derivative Control

The piezoelectric materials have the positive and inverse piezoelectric effects. The piezoelectric elements can be served as actuators and sensors. The piezoelectric elements are adopted to control the vibration of autobody thin-wall structure. The proportional control, proportional-derivative control and independent modal space control based on LQR (Linear Quadratic Regulator) are simulated by using finite element method. The piezoelectric patched autobody thin-wall structure is simplified to a square plate with peripheral clamped boundary. The finite element model is established. The central node displacement is monitored as a control variable in these control methods. Central patched plate and surrounding patched plate are analyzed under the three control methods. The effectiveness of vibration control is obtained. Compared with proportional control, the proportional-derivative control has advantage of oscillation suppression at the beginning vibration control and has more obvious vibration control effectiveness. Compared with the above two control methods, the independent modal space control based on LQR has a better stability and vibration suppression effectiveness.

The Simulation and Analysis of Piezoelectric Vibration Control for the Autobody Thin-Wall Structure

2013 ◽  
Vol 328 ◽  
pp. 599-603
Author(s):  
Chuan Liang Shen ◽  
Xiao Wen An ◽  
Ye Han ◽  
Da Xue Wang
Keyword(s):  
Finite Element ◽  
Vibration Control ◽  
Structural Parameters ◽  
Active Vibration Control ◽  
The Body ◽  
Wall Structure ◽  
Control Analysis ◽  
Thin Wall ◽  
Active Vibration ◽  
Piezoelectric Vibration

The finite element method is adopted to simulate the piezoelectric vibration control of the body thin-wall structure. The finite element model of piezoelectric laminated structure which is formed by attaching piezoelectric layer to the autobody thin-wall structure is established. The static analysis and modal analysis is condudted by the piezoelectric analysis of the finite element analysis software. The proportional control method is studied in the piezoelectric active vibration control analysis for the autobody thin-wall structure. The active vibration control effectiveness according to different structural parameters is analyzed and the influence rules of structural parameters are concluded.

scholarly journals Finite Element Model Updating of a Thin Wall Enclosure under Impact Excitation

2010 ◽  
Vol 24-25 ◽  
pp. 337-342 ◽  
Author(s):  
O.S. David-West ◽  
J. Wang ◽  
R. Cooper
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Model Updating ◽  
Dynamic Properties ◽  
Element Model ◽  
Impact Excitation ◽  
Experimental Result ◽  
Wall Structure ◽  
Thin Wall ◽  
The Impact

Simulation result of a structural dynamics problem is dependent on the techniques used in the finite element model and the major task in model updating is determination of the changes to be made to the numerical model so that dynamic properties are comparable to the experimental result. In this paper, the dynamic analysis of a thin wall structure ( approx. 1.5±0.1 mm thick) was realized using the Lanczos tool to extract the modes between 0 and 200 Hz, but the interest was to achieve a good aggreement between the first ten natural frequencies. A shell element with mid size nodes was used to improve the finite element result and the model was tunned using the damping constant, material properties and discretization. The correlation of the results from the impact excitation response test and the finite element was significantly improved. A correlation coefficient of 0.99 was achieved after tunning the model.

Finite Element Analysis and Optimization of Long-Span Gantry NC Machining Center Structure

2011 ◽  
Vol 346 ◽  
pp. 379-384
Author(s):  
Shu Bo Xu ◽  
Yang Xi ◽  
Cai Nian Jing ◽  
Ke Ke Sun
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Design Method ◽  
Dynamic Performance ◽  
Plate Thickness ◽  
Element Model ◽  
Wall Structure ◽  
Characteristic Analysis ◽  
Element Analysis ◽  
Dynamic Performance Analysis

The use of finite element theory and modal analysis theory, the structure of the machine static and dynamic performance analysis and prediction using optimal design method for optimization, the new machine to improve job performance, improve processing accuracy, shorten the development cycle and enhance the competitiveness of products is very important. Selected for three-dimensional CAD modeling software-UG NX4.0 and finite element analysis software-ANSYS to set up the structure of the beam finite element model, and then post on the overall structure of the static and dynamic characteristic analysis, on the basis of optimized static and dynamic performance is more superior double wall structure of the beam. And by changing the wall thickness and the thickness of the inner wall, as well as the reinforcement plate thickness overall sensitivity analysis shows that changes in these three parameters on the dynamic characteristics of post impact. Application of topology optimization methods, determine the optimal structure of the beam ultimately.

Analysis of Deformation for PC Thin-Wall Box Girders Exposed to Fire

2011 ◽  
Vol 368-373 ◽  
pp. 930-933
Author(s):  
Wei Hou ◽  
Shuan Hai He ◽  
Cui Juan Wang ◽  
Gang Zhang
Keyword(s):  
Finite Element ◽  
Thin Wall ◽  
Fire Load ◽  
Box Girders ◽  
Conduction Model ◽  
Load Model ◽  
Deformation Problem ◽  
Finite Element Procedure ◽  
Thin Walled

Being aimed to deformation problem of pre-stressed concrete thin-walled multi-room box girders exposed to co-action of fire and load, on the basis of enthalpy conduction model and thermo-mechanics parameters, the finite element procedure was applied to analyze the deformation of three spans pre-stressed concrete thin-walled multi-room box girders exposed to co-action of fire and load. In conclusion, the deflection is obvious under action of the variation width and fire load model.

Sign in / Sign up

Export Citation Format

Share Document