Method of Modal Analysis for Wind Turbines Based on Air-structure Coupling Vibration Model

2013 ◽  
Vol 12 (8) ◽  
pp. 1644-1649
Author(s):  
Wang Shoubin ◽  
Sun Xiaogang ◽  
Li Chengwei
Keyword(s):  
Modal Analysis ◽  
Wind Turbines ◽  
Coupling Vibration ◽  
Vibration Model

Modal Analysis of Ball Screw Based on ANSYS Software

2011 ◽  
Vol 314-316 ◽  
pp. 1981-1986 ◽  
Author(s):  
Qing Ke Yuan ◽  
Ya Nan Du ◽  
Yao Ding ◽  
Tong Le Wang
Keyword(s):  
Numerical Model ◽  
Machine Tool ◽  
Modal Analysis ◽  
Structure Analysis ◽  
Ball Screw ◽  
Feeding System ◽  
Ansys Software ◽  
Intrinsic Frequency ◽  
Vibration Model

Ball screw is an important part in the machine tool feeding system. This paper researches on the ball screw, establishes the 3D virtual numerical model by Pro/engineer. Modal analysis of ball screw is carried out in three different cases by ANSYS, then gets the intrinsic frequency and vibration model of ball screw. It provides reliable reference for further structure analysis of ball screw.

Research on Modal Analysis of Precision Micro Slitting Turn-Milling Machine Tool Based on Hammer Experimental Method

2019 ◽  
Vol 295 ◽  
pp. 67-72
Author(s):  
Zhong Peng Zheng ◽  
Xin Yang Jiang ◽  
Xin Jin
Keyword(s):  
Machine Tool ◽  
Modal Analysis ◽  
Experimental Method ◽  
Machine Tools ◽  
Processing Parameters ◽  
Milling Machine ◽  
Vibration Model ◽  
Vibration Modal ◽  
Turn Milling ◽  
Machine Structure

In order to improve the dynamic stability of precision micro slitting turn-milling machine tools, reduce or avoid the vibration problem during the cutting process, optimize the machine structure and processing parameters, the modal analysis of precision micro slitting turn-milling machine tool based on hammer experimental method was researched. In this paper, by analyzing the mechanism of precision micro slitting turn-milling machine tools, the multi degree-of-freedom mathematical vibration model of precision slitting turn-milling machine tools is constructed. The precision micro turn-milling machine tool is analyzed based on the hammer experiment analysis. The modal analysis obtained the first five natural frequencies and resonance speeds of the precision micro slitting turn-milling machine tool,including ST26, NN-25UB8K2 and NN-20UB87. The research results show that hammer experimental method can evaluate the vibration modal analysis of precision micro slitting turn-milling machine tools to some extent. The experimental modal analysis results guide and optimize the structural design and processing technology of precision micro slitting turn-milling machine tools.

A Measure to Imitate the Boundary Condition of Local Structure in Modal Analysis

2012 ◽  
Vol 594-597 ◽  
pp. 896-899
Author(s):  
Yu Chao Song ◽  
Biao Yang ◽  
Hong Liang Yu
Keyword(s):  
Boundary Condition ◽  
Modal Analysis ◽  
Local Structure ◽  
Lubricating Oil ◽  
Deformation Analysis ◽  
Beam Model ◽  
Coupling Vibration ◽  
Oil Tank ◽  
The Difference ◽  
Main Engine

The static element in static deformation analysis was used to simulate the boundary condition of local structure when studying the modality of local structure. Using this method, the vibration modality of a beam system and the main engine lubricating oil tank were researched. The results show that the usage of static element in dynamic analysis can solve the vibration modality of local structure accurately, the difference ratio of first order frequency is less than 1/10000 in the beam model analysis, and the modal analysis of main engine lubrication oil tank has a good performance, which is a helpful base for the coupling vibration research in ship structure.

Comparison of Vertical Model and Spatial Model for Vehicle-Track-Bridge Coupling Vibration System

2011 ◽  
Vol 243-249 ◽  
pp. 4307-4310
Author(s):  
Yuan Zhang ◽  
Wei Lin ◽  
Ze Ming Wang
Keyword(s):  
Vertical Vibration ◽  
Coupling Vibration ◽  
Spatial Coupling ◽  
Advantages And Disadvantages ◽  
Vibration Model ◽  
Spectrum Density ◽  
Exciting Source ◽  
Vibration Responses ◽  
Track Bridge ◽  
Bridge System

In this paper, models for vertical and spatial coupling vibration of vehicle-track-bridge system are established separately. The track vertical irregularity sample in time domain is established by power spectrum density and taken as the exciting source to analyze the coupling vibration of vehicle-track-bridge system of two models. The advantages and disadvantages and applicability of the vertical vibration model and the spatial vibration model are analyzed by comparing the vertical vibration responses of the two models under excitation with same level of track vertical irregularity.

scholarly journals A coupling vibration model of multi-stage pump rotor system based on FEM

Mechanika ◽  
2016 ◽  
Vol 22 (1) ◽  
Author(s):  
Leqin Wang ◽  
Wenjie Zhou ◽  
Xuesong Wei ◽  
Lulu Zhai ◽  
Guangkuan Wu
Keyword(s):  
Rotor System ◽  
Coupling Vibration ◽  
Pump Rotor ◽  
Multi Stage ◽  
Vibration Model

The Rotor’s Modal Analysis of the Vertical Shaft Impact Crusher

2012 ◽  
Vol 529 ◽  
pp. 215-219
Author(s):  
Li Zhang
Keyword(s):  
Modal Analysis ◽  
Dynamic Properties ◽  
Structure Design ◽  
Solid Model ◽  
Vertical Shaft ◽  
Vibration Model ◽  
Set Up

Used the Solidedge to bulid the solid model of the Vertical Shaft Impact crusher’s rotor, then it is imported into Ansys for modal analysis, get the former twenty frequency and vibration model, through the twenty color vibration models and vibration animations attained from analysis, the rotor’s dynamic properties and weakness area could be detected directly, to set up the foundmental theory for the structure design.

Modal Analysis of a Drilling Machine for Blades of Wind Turbines

2011 ◽  
Vol 308-310 ◽  
pp. 1850-1854
Author(s):  
Yong Shu Jiao ◽  
Yong Liang Zhang ◽  
Mu Hui Fan
Keyword(s):  
Modal Analysis ◽  
Wind Turbines ◽  
Software Package ◽  
Natural Frequencies ◽  
Position Angle ◽  
Simplified Model ◽  
Drilling Machine ◽  
Structural Stress ◽  
Specific Working

In this paper, the authors conducted a modal analysis of a drilling machine for blades of wind turbines. A simplified model of the machine was established with a commercial FEM software package, Ansys. At a specific working position the first six order natural frequencies were calculated and the results obtained from two different contacting manners were compared. The influence of static structural stress induced by gravitational load on natural frequency was also evaluated. The variations of the natural frequencies of the machine with the position angle of the rotary box were subsequently obtained. This is helpful for the determination of range of the excitation frequencies.

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