Improved Design of 2-DOF Micro-Positional Stage Based on Parallel Structure with Flexible Sheet

2012 ◽  
Vol 201-202 ◽  
pp. 24-29
Author(s):  
Shao Yong Zheng ◽  
Yu Guo Cui ◽  
Fan Fang
Keyword(s):  
Finite Element ◽  
Natural Frequency ◽  
Dynamic Characteristics ◽  
Optimization Method ◽  
Linear Displacement ◽  
Parallel Structure ◽  
Static And Dynamic Characteristics ◽  
Output Displacement ◽  
Finite Element Software ◽  
Improved Design

In order to obtain good static and dynamic characteristics of the 2-DOF micro-positional stage, improved design of developed stage were done. First, the part of displacement coupling for the stage was improved, which making the stage only have linear displacement at driving direction; Second, in order to acquire the highest natural frequency under the condition of given output displacement, micro-positional stage was designed by using the size optimization method. Finally, the static and dynamic characteristics of the stage were analyzed by the finite element software ANSYS. The finite element results show that: the stage completely eliminates the displacement coupling after improving design; under the condition of given 30 μm output displacement, natural frequency reaches 1.86 kHz.

Dynamic Characteristics Analysis and Optimization Design of Spindle Box with FEA

2012 ◽  
Vol 490-495 ◽  
pp. 2273-2277 ◽  
Author(s):  
Xiao Peng Li ◽  
Wei Wang ◽  
Mi Que Zhao ◽  
Xiao Chen Meng
Keyword(s):  
Finite Element ◽  
Shape Optimization ◽  
Objective Function ◽  
Natural Frequency ◽  
Dynamic Characteristics ◽  
Optimization Design ◽  
Static And Dynamic Characteristics ◽  
Maximum Deformation ◽  
Characteristics Analysis ◽  
Dynamic Characteristics Analysis

The simplified finite element modal was established with ANSYS aiming to study the spindle box. The changing regularity of the first 6-order natural frequency of spindle box was studied after the static and modal analysis. Shape optimization design was carried out by taking the maximum deformation of the direction of X，Y，Z as the objective function. The results show that the structure of spindle box after optimization can effectively reduce the maximum deformations of the direction of X，Y，Z，and has better static and dynamic characteristics.

Finite Element Analysis of Static and Dynamic Characteristics of High-Speed Horizontal Machining Center Bed

2014 ◽  
Vol 889-890 ◽  
pp. 58-61 ◽  
Author(s):  
Peng Wang ◽  
Yan Rui Zuo ◽  
Li Na Ren ◽  
Dong Dong Song
Keyword(s):  
Finite Element ◽  
Natural Frequency ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Lightweight Design ◽  
Element Analysis ◽  
Static And Dynamic Characteristics ◽  
Machining Center ◽  
Analysis Theory ◽  
Work Area

Based on the theory of finite element and modal analysis theory, analysis of static and dynamic characteristics of the lathe bed has been done. The static displacement contours and mode natural frequency and displacement contours have been given to realize the structure optimization of lathe bed of high-speed horizontal machining center. It is shown that the bed has good static stiffness and natural frequency and the deformation of lathe bed mainly occurred in the tray conversion mechanism and the cutter location. The deformation of processing work area is small and has certain light weight space, which lay the foundation for the lightweight design of the bed.

Effect of crack on free vibration of a pre-stressed curved plate

2021 ◽  
pp. 095440622199486
Author(s):  
Can Gonenli ◽  
Hasan Ozturk ◽  
Oguzhan Das
Keyword(s):  
Finite Element ◽  
Free Vibration ◽  
Natural Frequency ◽  
Present Model ◽  
Mode Shapes ◽  
Load Parameter ◽  
Flexible Plate ◽  
Cantilever Plate ◽  
Finite Element Software ◽  
Aspect Ratios

In this study, the effect of crack on free vibration of a large deflected cantilever plate, which forms the case of a pre-stressed curved plate, is investigated. A distributed load is applied at the free edge of a thin cantilever plate. Then, the loading edge of the deflected plate is fixed to obtain a pre-stressed curved plate. The large deflection equation provides the non - linear deflection curve of the large deflected flexible plate. The thin curved plate is modeled by using the finite element method with a four-node quadrilateral element. Three different aspect ratios are used to examine the effect of crack. The effect of crack and its location on the natural frequency parameter is given in tables and graphs. Also, the natural frequency parameters of the present model are compared with the finite element software results to verify the reliability and validity of the present model. This study shows that the different mode shapes are occurred due to the change of load parameter, and these different mode shapes cause a change in the effect of crack.

Static and Dynamic Characteristics Analysis of Precise Composite CNC Grinding Machine

2011 ◽  
Vol 411 ◽  
pp. 88-93
Author(s):  
Hong Lin Zhao ◽  
Yun Fei Sun ◽  
Rui Chen ◽  
Yu Mei Huang ◽  
Guang Peng Zhang ◽  
...  
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Element Model ◽  
Machine Model ◽  
Static And Dynamic Characteristics ◽  
Cnc Grinding ◽  
Characteristics Analysis ◽  
The Subject ◽  
Grinding Machine ◽  
Cnc Grinding Machine

The parameters of joint parts must be included in the finite element model of a whole grinding machine. The subject investigated in this paper is B2-K3000 high-precision composite flexible grinding machine. Through finite element modeling, the joint part parameters are integrated into the whole grinding machine model to establish a dynamic model and then analyze its static and dynamic characteristics. The result shows that the whole grinding machine possesses good features, but it still needs to be improved. This paper gives suggestions for its structure development and application.

An Improved Design of the Shrike Warhead and its Damage Effectiveness

2014 ◽  
Vol 644-650 ◽  
pp. 597-601
Author(s):  
Wen Kai Chen ◽  
Xiang Yu Li ◽  
Fang Yun Lu ◽  
Rong Chen ◽  
Zhen Yu Zhang
Keyword(s):  
Finite Element ◽  
Data Analysis ◽  
Explosive Loading ◽  
Finite Element Software ◽  
Improved Design

Based on the design of a conventional Shrike warhead, an improved design of warhead is proposed, which combined the properties of a deformable warhead. The processes of explosive loading and fragments scattering are simulated by the finite element software LS-DYNA, the improved warhead and the conventional Shrike warhead are detonated in different initiating modes. According to data analysis, gains of fragment density and velocity on target have been achieved. Furthermore, the damage effectiveness of fragments against Patriot radar car has been estimated.

scholarly journals Analysis and Testing of the Dynamic Characteristics of Rotor Worktable

2021 ◽  
Vol 2113 (1) ◽  
pp. 012061
Author(s):  
Jianmin Wang ◽  
Dong Liu ◽  
Yi Bian
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Dynamic Characteristics ◽  
Mesh Generation ◽  
Finite Element Modelling ◽  
Experimental Results ◽  
Element Modelling ◽  
Software Analysis ◽  
Finite Element Software ◽  
Research And Teaching

Abstract The finite element modelling, mesh generation and modal analysis of the rotor worktable are carried out by combining the analysis technology of finite element software in this paper. Then, the software analysis results and the actual experimental results are compared and analyzed, so as to get the causes of error, which can provide good basic data for the use of the rotor table in the future that could better meet the needs of scientific research and teaching.

scholarly journals The Design of Follow-up Hydraulic Muffler Based on Spring-Damp Regulating Device

2019 ◽  
Vol 79 ◽  
pp. 01006
Author(s):  
Chang-ji Shan ◽  
Yi-duo Bian ◽  
Ting-ting Dai ◽  
Cai Yan ◽  
Guo-fang Du ◽  
...  
Keyword(s):  
Natural Frequency ◽  
Dynamic Characteristics ◽  
Rotational Speed ◽  
Pulsation Frequency ◽  
Attenuation Effect ◽  
Static And Dynamic Characteristics ◽  
Section Area

The follow-up hydraulic muffler can make the natural frequency of the muffler equal to systematic pulsation frequency in time by changing the section area of the quality chamber so as to achieve the best attenuation effect. In this paper, a spring-damp regulator is installed on the basis of the hydraulic muffler, and the static and dynamic characteristics of the follow-up hydraulic muffler are analyzed by measuring the rotational speed of the pump with the sensor. The results show that the hydraulic muffler based on the spring-damp regulator can effectively attenuate the pulsation.

Investigation of stiffness of small wind turbine blade based on vibration analysis technique

2019 ◽  
Vol 44 (1) ◽  
pp. 49-59
Author(s):  
Nilesh Chandgude ◽  
Nitin Gadhave ◽  
Ganesh Taware ◽  
Nitin Patil
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Wind Turbine ◽  
Natural Frequency ◽  
Vibration Analysis ◽  
Natural Frequencies ◽  
Mode Shapes ◽  
Element Analysis ◽  
Finite Element Software ◽  
Small Wind Turbine

In this article, three small wind turbine blades of different materials were manufactured. Finite element analysis was carried out using finite element software ANSYS 14.5 on modeled blades of National Advisory Committee for Aeronautics 4412 airfoil profile. From finite element analysis, first, two flap-wise natural frequencies and mode shapes of three different blades are obtained. Experimental vibration analysis of manufactured blades was carried out using fast Fourier transform analyzer to find the first two flap-wise natural frequencies. Finally, the results obtained from the finite element analysis and experimental test of three blades are compared. Based on vibration analysis, we found that the natural frequency of glass fiber reinforced plastic blade reinforced with aluminum sheet metal (small) strips increases compared with the remaining blades. An increase in the natural frequency indicates an increase in the stiffness of blade.

Analysis of Bridge Pier’s Dynamic Characteristics Considering Fluid-Solid Interface Coupling

2014 ◽  
Vol 1049-1050 ◽  
pp. 464-468
Author(s):  
Chen Hui Jin ◽  
Bo Ming Zhao ◽  
Run Bo Bai
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Dynamic Performance ◽  
Great Influence ◽  
Water Structure ◽  
Natural Vibration Frequency ◽  
Finite Element Software ◽  
Interface Coupling ◽  
Solid Interface ◽  
Calculation Results

In the study of bridge pier’s dynamic characteristics, the modal analysis is the foundation of other dynamic analysis and is of great significance for studying other dynamic performance. Based on the dynamic theory of fluid-solid interface coupling, a 3D water-structure coupling finite element modal is established and computed by ANSYS. To verify the validity of the calculation results, the results of finite element software is compared with the analytical solutions in reference books. The analysis indicated that the results of finite element software are reasonable when the radius of bridge pier is five times the radius of water body. The ratio of water depth and the bridge pier’s height has a great influence on the change scale of bridge pier’s frequency. With the increase of bridge pier’s height-diameter ratio, the first three order natural vibration frequency is reduced.

Sign in / Sign up

Export Citation Format

Share Document