Statics Analysis on Beam Structures of Large Five-Axis Machining Center Based on ANSYS

2011 ◽  
Vol 80-81 ◽  
pp. 927-931 ◽  
Author(s):  
Yan Qing Wang ◽  
Gao Yan Zhong ◽  
Yong Biao Chang ◽  
Guo Xin Liu
Keyword(s):  
Static Characteristics ◽  
Beam Structure ◽  
Element Analysis ◽  
Beam Structures ◽  
High Rigidity ◽  
Machining Center ◽  
The Finite Element Analysis ◽  
Design Requirements ◽  
And Performance ◽  
Five Axis

The stroke and the material characteristics of the large five-axis machining center were expounded; a structure similar to the truss of the reinforced beam plates was designed according to the design requirements of the beam structure, this structure could make the frame gain high rigidity in small size, the frame made by the rods could be constituted with high rigidity, the overall rigidity of the machining center could be improved 23% - 25%; three different beam structures were designed, and the finite element analysis software ANSYS was carried out to analyze their static characteristics, the maximum deformations in three directions X, Y, Z were obtained; compared with other structures through the comparisons on mass, stiffness and performance, the optimal structure was obtained, its mass was 1818Kg, and its maximum deformations in X, Y, Z directions were 0.45mm, 0.07mm and 0.13mm, respectively.

Dynamic Analysis of a High-Speed Grinding Spindle

2011 ◽  
Vol 215 ◽  
pp. 89-94 ◽  
Author(s):  
Jing Zhu Pang ◽  
Bei Zhi Li ◽  
Jian Guo Yang ◽  
Zhou Ping Wu
Keyword(s):  
Finite Element ◽  
Dynamic Analysis ◽  
High Speed ◽  
Grinding Wheel ◽  
Static Characteristics ◽  
Motorized Spindle ◽  
Element Analysis ◽  
Spindle System ◽  
The Finite Element Analysis ◽  
High Speed Grinding

This paper presents the effects of spindle system configuration on the dynamic and static characteristics of high speed grinding. A 3D physical mode of high-speed grinding motorized spindle system with rotation speed of 150m/s was provided. The motorized spindle system consists of bearings, rotor, stator, spindle housing and grinding wheel. Based on the finite element method (FEM), the static characteristics, dynamic and the transient response are analyzed based on the finite element analysis software NASTRAN. It is shown that the spindle overhanging, bearing span have a significant effort on spindle deflection. The dynamic analysis shows no resonance will happen during its speed range. The methods and solutions for the motorized spindle system design and engineering applications was given in this paper.

scholarly journals Effect of Blade Thickness on Internal Flow and Performance of a Plastic Centrifugal Pump

Machines ◽  
2022 ◽  
Vol 10 (1) ◽  
pp. 61
Author(s):  
Zhenfa Xu ◽  
Fanyu Kong ◽  
Lingfeng Tang ◽  
Mingwei Liu ◽  
Jiaqiong Wang ◽  
...  
Keyword(s):  
Centrifugal Pump ◽  
Variable Thickness ◽  
Internal Flow ◽  
Constant Thickness ◽  
Element Analysis ◽  
Pump Performance ◽  
Blade Thickness ◽  
The Finite Element Analysis ◽  
Pump Head ◽  
And Performance

Blade thickness is an essential parameter of the impeller, which has significant effects on the pump performance. The plastic pump generally adopts thick blade due to low strength of plastic. The effects of blade thickness on the internal flow and performance of a plastic centrifugal pump were discussed based on the numerical methods. Two kinds of blade profile, the constant thickness blade (CTB) and the variable thickness blade (VTB), were investigated. The results indicated that, for the CTB, when the blade thickness was less than 6 mm, the pump performance did not change significantly. When the blade thickness exceeded 6 mm, the pump head and efficiency decreased rapidly. The pump head and efficiency of CTB 10 decreased by 42.2% and 30% compared with CTB 4, respectively. For the VTB, with blade thickness in a certain range (6 mm–14 mm), the pump performance changed slightly with the increased of trailing edge thickness. The minimum blade thickness of the plastic centrifugal pump should be 4 mm based on the finite element analysis. A variable thickness blade (VTB 4-8-4) with the maximum thickness located at 60% chord length was proposed to improve the pump performance, and its efficiency was 1.67% higher than that of the CTB 4 impeller.

scholarly journals Investigation of a New Flux-Modulated Permanent Magnet Brushless Motor for EVs

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Ying Fan ◽  
Lingling Gu ◽  
Yong Luo ◽  
Xuedong Han ◽  
Ming Cheng
Keyword(s):  
High Speed ◽  
Simple Structure ◽  
Static Characteristics ◽  
Direct Drive ◽  
Element Analysis ◽  
Torque Density ◽  
Brushless Motor ◽  
Design Requirements ◽  
High Torque ◽  
Compact Design

This paper presents a flux-modulated direct drive (FMDD) motor. The key is to integrate the magnetic gear with the PM motor while removing the gear inner-rotor. Hence, the proposed FMDD motor can achieve the low-speed high-torque output and high-speed compact design requirements as well as high-torque density with a simple structure. The output power equation is analytically derived. By using finite element analysis (FEA), the static characteristics of the proposed motor are obtained. Based on these characteristics, the system mathematical model can be established. Hence, the evaluation of system performances is conducted by computer simulation using the Matlab/Simulink. A prototype is designed and built for experimentation. Experimental results are given to verify the theoretical analysis and simulation.

K-Type, Inverse K-Type and X-Type Legs Stability Analysis of Jack-Up Offshore Platform

2013 ◽  
Vol 312 ◽  
pp. 205-209
Author(s):  
Wen Xian Tang ◽  
Jun Cao ◽  
Jian Zhang ◽  
Chao Gao
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Maximum Stress ◽  
Offshore Platform ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Design Requirements ◽  
The Stability ◽  
Jack Up ◽  
Survival Condition

The force situation of truss legs has an important impact on the jack-up offshore platform. The finite element analysis on three types truss leg was made, and the stability of the three types truss leg under preload, operating and storm survival condition was discussed. The result showed that the maximum stress was in the chord; they met the design requirements; K type, inverse K type can save material, and they both met resonance requirements. The former had a better stability under preload condition, and the later had the best stability under operating, storm survival condition.

Finite Element Analysis of Blower Impeller Using Cyclic Symmetry

2007 ◽  
Vol 353-358 ◽  
pp. 1082-1085
Author(s):  
Chang Boo Kim ◽  
Young Chul Ahn ◽  
Bo Yeon Kim ◽  
Chong Du Cho ◽  
Hyeon Gyu Beom
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fourier Transform ◽  
Natural Vibration ◽  
Cyclic Symmetry ◽  
Static Characteristics ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Non Linear ◽  
Comparison Of The Results

In this paper, we present an efficient method for conducting a finite element analysis of a structure with cyclic symmetry and apply the method to analyze the natural vibration and linear and non-linear static characteristics of a blower impeller. A blower impeller is composed of circumferentially repeated substructures. The whole structure is partitioned into substructures, and the finite element analysis can thus be performed with one representative substructure by using the transformed equations for each number of nodal diameters, which are derived from a discrete Fourier transform. We calculated the natural vibration and linear and non-linear static characteristics of a blower impeller without a stiffening ring, and with small as well as large stiffening rings, respectively. The accuracy and efficiency of the presented method are verified by comparison of the results obtained from the analysis using a substructure to those obtained using the whole structure.

Research on Wave Mode Conversion of Curved Beam Structures by the Wave Approach

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
Huang Xiuchang ◽  
Hua Hongxing ◽  
Wang Yu ◽  
Du Zhipeng
Keyword(s):  
Power Flow ◽  
Vibration Isolation ◽  
Mode Conversion ◽  
Wave Mode ◽  
Curved Beam ◽  
Beam Structure ◽  
Element Analysis ◽  
Beam Structures ◽  
High Attenuation ◽  
Wave Approach

A general wave approach for the vibration analysis of curved beam structures is presented. The analysis is based on wave propagation, transmission, and reflection, including the effects of both propagating and decaying near-field wave components. A matrix formulation is used that offers a systematic and concise method for tackling free and forced vibrations of complex curved beam structures. To illustrate the effectiveness of the approach, several numerical examples are presented. The predictions made using the wave approach are shown to be in excellent agreement with a conventional finite element analysis, with the advantage of reduced computational costs and good conditioning number of the characteristic equation. The developed wave approach is applied to investigate the free vibration, vibration transmission, and power flow of built-up structures consisting of curved beams, straight beams, and masses, with the aim for designing vibration isolation structure with high attenuation ability. Wave reflection and transmission in the infinite curved beam structure, as well as vibration and energy transmission in coupled finite curved beam structure are investigated. Numerical results show that wave mode conversion takes place for the reflected and transmitted wave propagating through a curved beam, and the power flow in the coupled curved beam structure shows energy attenuation and conversion by curved beam and the discontinuities. The investigation will shed some light on the designing of curved beam structures.

Study on Thermal Deformation of Machining Center’s Spindle Box Based on ANSYS

2012 ◽  
Vol 217-219 ◽  
pp. 2528-2532 ◽  
Author(s):  
Hong Qiang Zeng ◽  
Deng Feng Zhao ◽  
Guo Ying Zeng ◽  
Long Zhang
Keyword(s):  
Thermal Deformation ◽  
Thermal Structure ◽  
Cnc Machining ◽  
Thermal Displacement ◽  
Element Analysis ◽  
Machining Center ◽  
The Finite Element Analysis ◽  
Sequential Coupling ◽  
Processing Accuracy ◽  
Cnc Machining Center

Thermal deformation of spindle box is an important factor affecting processing accuracy of the high precision CNC machining center. In order to research the distribution of spindle box’s thermal deformation, physics-environment method of sequential coupling analysis was used to analyze thermal-structure coupling with the finite element analysis software ANSYS. The results show that the rise of temperature of motor is the highest, and the rise of temperature of the back-end of spindle is the lowest. Thermal displacement on the front of spindle is the largest, and it is the main part that affects the precision of machining center.

Design and Development of a Piezoelectric Actuator for the Scanning Probe Microscope Used in Ultrahigh Vacuum

2007 ◽  
Vol 23 (2) ◽  
pp. 117-126 ◽  
Author(s):  
K.-Y. Huang ◽  
C.-J. Lee
Keyword(s):  
Piezoelectric Actuator ◽  
Ultrahigh Vacuum ◽  
Scanning Probe ◽  
Design And Development ◽  
Element Analysis ◽  
Measuring Probe ◽  
The Finite Element Analysis ◽  
Probe Microscope ◽  
And Performance ◽  
Clamping Device

AbstractThis paper is to present the design and development of a piezoelectric actuator for SPM in ultrahigh vacuum (10−7∼10−9 Torr). The measuring probe is installed on a precise scanning actuator, which is further driven by a fast approaching actuator. The precise scanning actuator composed of a piezo-tube with segmented electrodes can realize 3-D precise scanning motions at subnanometer level to move the measuring probe over the measured surface. Because of its stable and smooth actuating behavior, the inchworm actuating principle is selected for the fast approaching actuator, which is build up with two controllable clamping devices and an actuating device. Diverse flexure mechanisms are applied in the actuator to attain frictionless guiding and recovery functions. To realize balanced clamping forces on the scanning tube, each clamping device is integrated with a fine regulating mechanism for clamping force. By applying the theoretical model and the finite element analysis, the relations between force and deflection inside the actuator were investigated to validate its function. The developed actuator has sustained the severe baking and pumping process, and their function and performance were verified experimentally in ultrahigh vacuum.

Study on the Mechanical Properties of the Hydropneumatic Fender

2010 ◽  
Vol 34-35 ◽  
pp. 1294-1298
Author(s):  
Jing Jun Lou ◽  
Dao Zhou Chen ◽  
Shi Jian Zhu ◽  
Xiao Qiang Wang
Keyword(s):  
Mechanical Properties ◽  
Theoretical Model ◽  
Energy Absorption ◽  
Reaction Force ◽  
Element Analysis ◽  
Volume Percentage ◽  
The Finite Element Analysis ◽  
Reaction Forces ◽  
And Performance ◽  
Theoretical Results

The dynamics and performance of hydropneumatic fender were studied. A theoretical model of the hydropneumatic fender was established to calculate its reaction forces and energy absorption capability. The influences of the length, diameter, volume percentage of water, and the internal air pressure upon the mechanical properties were analyzed. The reaction force and energy absorption capability of the hydropneumatic fender were numerically studied with the finite element analysis software MSC.Dytran. The numerical results were in agreement with the theoretical results, which showed that the theoretical model has well accuracy and is significative for the design of the hydropneumatic fender.

The Application of Piezoelectric Actuator for Small Aircraft

2014 ◽  
Vol 998-999 ◽  
pp. 674-677 ◽  
Author(s):  
Xing Zhang ◽  
Wei Wang ◽  
Guang Hua Zong
Keyword(s):  
Piezoelectric Actuator ◽  
Experimental Testing ◽  
Piezo Actuator ◽  
Element Analysis ◽  
Finite Element Analysis Simulation ◽  
The Finite Element Analysis ◽  
Working Principle ◽  
Design Requirements ◽  
Actuator Design ◽  
Design Construction

This paper describes the design, construction, and analysis of a new piezoelectric actuator design for small aircrafts in the special requirements of the steering weight. It describes the working principle of piezo actuator, optimizes the piezo chip specification parameters by experimental measurements, put forward the finite element analysis simulation and the experimental testing of piezoelectric actuators’ drive performance. The simulation and experimental results show that the new design meets the design requirements of weight and space control.

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