Study on Dynamic Characteristics of a New Space Latticed Shell String Structure

2014 ◽  
Vol 919-921 ◽  
pp. 239-242
Author(s):  
Yun Long Yao ◽  
Guang Ying Ma ◽  
Shi Lin Dong
Keyword(s):  
Modal Analysis ◽  
Dynamic Characteristics ◽  
String Structure ◽  
New Space

Latticed shell string structure with inner and outer truss torus, radial cables of which emerge from the roof, is proposed. Ribbed latticed shell string structure with a span of 100m is taken as an example and the modal analysis is performed. The effects of the rises of radial cables and the curvatures of latticed shell on dynamic characteristics of this structure are also investigated. The result reveals some characteristics of modal of the latticed shell string structure with inner and outer truss torus, which could be referenced by structure designers.

Dynamic Characteristics of a New Space Beam String Structure with Outer Truss Torus

2012 ◽  
Vol 588-589 ◽  
pp. 1960-1963
Author(s):  
Yun Long Yao ◽  
Guang Ying Ma ◽  
Shi Lin Dong
Keyword(s):  
Dynamic Characteristics ◽  
Lanczos Method ◽  
Load Level ◽  
Structure System ◽  
System A ◽  
Wind Vibration ◽  
String Structure ◽  
New Type ◽  
New Space ◽  
Block Lanczos Method

The large-span space beam string-structure system is a kind of economic and larger spanning spatial structure system. A new type of space beam-string-structure with outer truss torus is introduced. Sunflower-patterned space beam-string-structure was taken as an example and its dynamic characteristics under full-span load and half-span load were analyzed by block Lanczos method. The efect of prestress level and load level on dynamic behavior of the structure was studied. The results are valuable for the dynamic response research on the earthquakes and wind vibration and will provide a reference for a further design and project application of such structure.

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.

Modal Analysis of Wind Turbine Blades Based on ANSYS Modeling

2013 ◽  
Vol 790 ◽  
pp. 655-658
Author(s):  
Chi Chen ◽  
Min Wang ◽  
Long Zou
Keyword(s):  
Wind Turbine ◽  
Modal Analysis ◽  
Detailed Analysis ◽  
Dynamic Characteristics ◽  
Natural Vibration ◽  
Turbine Blades ◽  
Mode Shapes ◽  
Wind Turbine Blades ◽  
Horizontal Axis Wind Turbine ◽  
Basic Parameters

The modal analysis is an approximate method to study the dynamic characteristics of the structure, the modal is the natural vibration characteristics of the structure, each modal has a specific natural frequency, damping ratios and mode shapes. This thesis will take 1.2MW horizontal axis wind turbine blade for example, and use parametric language APDL of ANSYS for directly modeling, then set the basic parameters of the material, mesh and discuss modal analysis, lastly conduct a detailed analysis of the results.

Application of Experimental Modal Analysis Method in Researching of Mechanical Structure Dynamic Characteristics

2013 ◽  
Vol 694-697 ◽  
pp. 370-373
Author(s):  
Zhang Yu ◽  
Wen Zheng Cai
Keyword(s):  
Modal Analysis ◽  
Natural Frequency ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Experimental Modal Analysis ◽  
Analysis Method ◽  
Mechanical Structure ◽  
Vibration Resistance ◽  
Structural Rigidity ◽  
Structure Dynamic

With the purpose of realizing the analysis of mechanical structure dynamic characteristics and inhibit vibration and noise, combined with the analysis of a certain type of high speed sewing machines vibration characteristics, we carry on the concrete experimental modal analysis, and compare the results of the experimental modal analysis with the results of spectrum analysis. The analysis results show that the second order natural frequency of the shell is close to two octaves under the normal working speed of sewing machine and it will lead to resonance. Enhancing the structural rigidity and the natural frequency under this modal to avoid resonance frequency is the key to improve vibration resistance of the structure.

Modal analysis of the dynamic characteristics of a numerically controlled woodworking center

2015 ◽  
Vol 35 (1) ◽  
pp. 64-68 ◽  
Author(s):  
D. Yu. Pimenov ◽  
V. I. Guzeev ◽  
A. A. Koshin ◽  
V. A. Pashnyov
Keyword(s):  
Modal Analysis ◽  
Dynamic Characteristics

Dynamic Characteristics Analysis for Seismic Vibrator

2014 ◽  
Vol 472 ◽  
pp. 48-55
Author(s):  
Li Qiang An ◽  
Fan Peng Kong ◽  
Yong Fang Wang
Keyword(s):  
Modal Analysis ◽  
Dynamic Characteristics ◽  
Data Transfer ◽  
Element Model ◽  
Dynamics Simulation ◽  
Characteristic Analysis ◽  
Characteristics Analysis ◽  
Stiffness And Damping ◽  
Multi Body ◽  
Seismic Vibrator

Seismic vibrator is one of the most widely used equipments in exploration field. In recent years, with the development of exploration field, as well as the growing needs of high quality seismic data, the seismic vibrator's tonnage has increased a lot, which makes the stress of the vehicle frame very complicated in working state. And some local structure of the vehicle frame often appears crack phenomenon in working state. Therefore, the dynamic characteristic analysis is essential to the Seismic vibrator. In this paper, the finite element model of vehicle frame is established by ANSYS software. Through the modal analysis, the natural frequencies are obtained, and each vibration modes are analyzed. On the basis of the modal analysis, the modal neutral file of the vehicle frame is established. Using the data transfer function between ANSYS and ADAMS, the rigid-flexible coupling multi-body model is built for the dynamics simulation of the seismic vibrator. In this model, the stiffness and damping of air springs, hydraulic oil and soil are simulated by the spring-damper in the ADAMS software. The dynamic characteristics of vehicle frame under excited forces with different amplitude are obtained and analyzed. The stresses for some of the hot spots of the vehicle frame are extracted, which can be used to analyze the dynamic failure of the vehicle frame.

The Modal Analysis for the Third Type of Internal Gear Motor

2013 ◽  
Vol 690-693 ◽  
pp. 3023-3026
Author(s):  
Jun Zhang ◽  
Chun Ren Tang ◽  
Hong Mei Tang ◽  
Xian Hua Li ◽  
Meng Meng Niu ◽  
...  
Keyword(s):  
Modal Analysis ◽  
Mechanical System ◽  
Natural Frequency ◽  
Dynamic Characteristics ◽  
Mode Shape ◽  
Mechanical Systems ◽  
The Third ◽  
Internal Gear

It is significant to study the dynamic characteristics of the mechanical system. In order to prevent accidents such as resonance and self-excited shock, modal analysis of the mechanical systems should be analyzed. The mode shape of gears was analyzed to improving the design security. The sleeve, the planet gears and the internal gear of the motor were simulated. All order natural frequency, the mode shape of the motor was obtained. Research shows that motor running is smooth when the frequency is less than 4230Hz.

FEA on Vibration Characteristics of a Shrouded Turbine Blade

2012 ◽  
Vol 189 ◽  
pp. 443-447
Author(s):  
Wei Qiang Zhao ◽  
Yong Xian Liu ◽  
Mo Wu Lu
Keyword(s):  
Optimal Design ◽  
Modal Analysis ◽  
Turbine Blade ◽  
Dynamic Characteristics ◽  
Natural Frequencies ◽  
Vibration Characteristics ◽  
Mode Shapes ◽  
Software Environment ◽  
Aero Engine ◽  
Characteristics Analysis

This paper introduces a FEA method for vibration characteristics analysis of an aero-engine shrouded turbine blade and makes an actual modal analysis of this shrouded blade based on this method in UG software environment. The first six natural frequencies and mode shapes of this shrouded blade are calculated. And also, the dynamic characteristics of the shrouded turbine blade are discussed in detail according to the analysis results. The FEA method and the vibration characteristics analysis results in the paper can be used for optimal design and vibration safety verification of this aero-engine shrouded turbine blade.

scholarly journals A Study on the Dynamic Characteristics of Tennis Racket by Modal Analysis

1986 ◽  
Vol 29 (253) ◽  
pp. 2228-2231 ◽  
Author(s):  
Eung Jae OH ◽  
Ha Sun YUM
Keyword(s):  
Modal Analysis ◽  
Dynamic Characteristics ◽  
Tennis Racket
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