Dynamic Characteristics Analysis of Cable-Rib Tension Deployable Antenna

2016 ◽  
Author(s):  
Liu Ruiwei ◽  
Hongwei Guo ◽  
Zhang Qinghua ◽  
Rongqiang Liu ◽  
Tang Dewei
Keyword(s):  
Dynamic Characteristics ◽  
Structural Parameters ◽  
Element Model ◽  
Structure Design ◽  
Antenna Structure ◽  
Characteristics Analysis ◽  
New Type ◽  
Dynamic Characteristics Analysis ◽  
The Finite Element Model ◽  
Weight Dynamic

Balancing stiffness and weight is of substantial importance for antenna structure design. Conventional fold-rib antennas need sufficient weight to meet stiffness requirements. To address this issue, this paper proposes a new type of cable-rib tension deployable antenna that consists of six radial rib deployment mechanisms, numerous tensioned cables, and a mesh reflective surface. The primary innovation of this study is the application of numerous tensioned cables instead of metal materials to enhance the stiffness of the entire antenna while ensuring relatively less weight. Dynamic characteristics were analyzed to optimize the weight and stiffness of the antenna with the finite element model by subspace method. The first six orders of natural frequencies and corresponding vibration modes of the antenna structure are obtained. In addition, the effects of structural parameters on natural frequency are studied, and a method to improve the rigidity of the deployable antenna structure is proposed.

Dynamic Characteristics Analysis and Structural Topology Optimization of the Plane Grinder

2016 ◽  
Vol 693 ◽  
pp. 471-478
Author(s):  
Rui Tao Peng ◽  
Wang Yan ◽  
Xin Zi Tang ◽  
Zhuan Zhou
Keyword(s):  
Machine Tool ◽  
Dynamic Characteristics ◽  
Weak Link ◽  
Element Model ◽  
Variable Density ◽  
Structural Topology ◽  
Static And Dynamic Characteristics ◽  
Before And After ◽  
Characteristics Analysis ◽  
Dynamic Characteristics Analysis

The dynamic characteristic is one of the important indicators which determine the performance of a machine tool, in this paper, the finite element model of a plane grinder is established with consideration of the behavior of joint, the static dynamic characteristics of machine tools are analyzed to reveal the vibration weak link, the column structure is topology optimized and redesigned based on the variable density degradation method. Static and dynamic characteristics of the original and new column are compared, and the dynamic characteristics of the machine tool before and after modification are discussed. The results indicate that the static and dynamic characteristics of the plane grinder are all improved after optimization.

The Numerical Simulation Analysis of Irregular Frame Structure Dynamic Characteristics

2013 ◽  
Vol 739 ◽  
pp. 373-375
Author(s):  
Fang Zhang
Keyword(s):  
Numerical Simulation ◽  
Dynamic Characteristics ◽  
Simulation Analysis ◽  
Structure Design ◽  
Frame Structure ◽  
Ansys Software ◽  
Mass Percentage ◽  
Structure Dynamic ◽  
Characteristics Analysis ◽  
Dynamic Characteristics Analysis

A bump of irregular frame structure as an example, the use of ANSYS software, the structure dynamic characteristics analysis, given the cycle ratio and modal participation mass percentage, as the bump of irregular frame structure design reference.

Dynamic Characteristic Analysis of CNC Turret Punch Servo Beam

2016 ◽  
Vol 836-837 ◽  
pp. 522-528
Author(s):  
Yan Jun Guo
Keyword(s):  
Dynamic Characteristics ◽  
Optimization Design ◽  
Natural Frequencies ◽  
Element Model ◽  
Mode Shapes ◽  
Characteristic Analysis ◽  
Boundary Constraints ◽  
Modeling Methodology ◽  
Characteristics Analysis ◽  
Dynamic Characteristics Analysis

This paper resolved CNC turret punch cause vibration phenomenon in the course of processing sheet,analysis of its dynamic characteristics of the beam servo feed mechanism, using the method of constrained modal analysis.Through the establishment of finite element model exactly for the servo beam and setting the boundary elastic restraint stiffness, solving the natural frequencies and mode shapes of the servo beam under boundary constraints and loading conditions. Constraints modal analysis results are consistent with experimental monitoring results of CNC turret punch servo beam. This modeling methodology and results of the analysis has a high practical value for CNC turret punch dynamic characteristics analysis and structural optimization design.

Spindle System Dynamic Characteristics Analysis of Vertical Gantry Machining Center

2013 ◽  
Vol 456 ◽  
pp. 286-290
Author(s):  
Hong Bing Huang ◽  
Yong Ming Wang ◽  
Shuai Xia
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Element Model ◽  
Motorized Spindle ◽  
Spindle System ◽  
Machining Center ◽  
Object Based ◽  
Characteristics Analysis ◽  
Dynamic Characteristics Analysis ◽  
The Finite Element Model

With the spindle system of a vertical gantry machining center as the research object, based on the vibration theory and finite element method, the modal analysis of spindle system is studied. Firstly, the finite element models of the mandrel box body and motorized spindle frame of spindle system are established by ANSYS. And then do the modal analysis of singleton in the boundary of free constraint. Lastly, based on the analysis results to establish the finite element model of the whole spindle system and do the modal analysis of the whole system which under constraint condition. The result shows that the swing of motorized spindle frame and motorized spindle sleeve of spindle system are more obvious.

scholarly journals Dynamic characteristics analysis for a new-type maglev vehicle

2017 ◽  
Vol 9 (12) ◽  
pp. 168781401774541 ◽  
Author(s):  
Keren Wang ◽  
Shihui Luo ◽  
Weihua Ma ◽  
Xiaohao Chen
Keyword(s):  
Dynamic Characteristics ◽  
Maglev Vehicle ◽  
Characteristics Analysis ◽  
New Type ◽  
Dynamic Characteristics Analysis

Dynamic Characteristics Analysis of Large-Span Cable-Stayed Bridge

2015 ◽  
Vol 713-715 ◽  
pp. 22-25
Author(s):  
Xiao Xing Shi
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Dynamic Characteristics ◽  
Element Model ◽  
Element Analysis ◽  
Large Span ◽  
Earthquake Resistant ◽  
Characteristics Analysis ◽  
Dynamic Characteristics Analysis ◽  
Cable Stayed Bridges

The built-up large-span cable-stayed bridges are taken as the engineering background Integrated finite element analysis for whole bridge is applied to establish finite element model of calculative reference bridge . General finite element project is adopted to establish space finite element model for the full bridge, calculate its dynamic characteristics, combine other same types’ theoretical calculation, and analyze the dynamic characters of this kind of bridge, which provide references for the earthquake-resistant and wind-resistant design of this type of bridge.

Dynamic Characteristics Analysis for Fluid-Solid Coupling of Vertical Lifting Pipe in Transporting Coarse Particles

2012 ◽  
Vol 160 ◽  
pp. 35-41 ◽  
Author(s):  
Zhi Jin Zhou ◽  
Zhao Wang ◽  
Hao Lu ◽  
Yi Min Xia
Keyword(s):  
Dynamic Characteristics ◽  
Structure Design ◽  
Solid Particles ◽  
Finite Element Models ◽  
Characteristics Analysis ◽  
Coupling Dynamic ◽  
Run Up ◽  
Ocean Mining ◽  
Dynamic Characteristics Analysis ◽  
Pipe Vibration

Fluid-solid coupling dynamic characteristics analysis of vertical cantilever lifting pipe in transporting coarse solid particles was conducted by adopting ADINA. Firstly, finite element models of pipe and fluid were built, which was solved by using ADINA/FSI module. Secondly dynamic characteristics of pipe vibration for different run-time, constrain conditions, volume concentration and transporting velocities were studied. Thirdly the stress and displacement characteristics were discussed under above conditions. The results were shown that stress and displacement will increase with transporting concentration and velocity rising; the shorter run-up time is, the bigger stress and displacement will be; stress and displacement of lifting pipe supportive anchor in weak constrain were greater than that in fixed connect condition. Analysis results have certain directive significance in future structure design, check, reducing vibration study for lifting pipeline in the ocean mining.

Stress and Dynamic Characteristics Analysis of Multilayer Composite Flywheel

2013 ◽  
Vol 655-657 ◽  
pp. 185-189
Author(s):  
Guang Xi Li ◽  
Fan Xin Kong ◽  
Lin He ◽  
Li Yang
Keyword(s):  
Natural Frequency ◽  
Dynamic Characteristics ◽  
Element Model ◽  
Calculation Model ◽  
Multilayer Composite ◽  
Composite Flywheel ◽  
Characteristics Analysis ◽  
Rotor Structure ◽  
Symmetric Theory ◽  
Dynamic Characteristics Analysis

Stress and dynamic characteristics analysis of Multilayer composite flywheel to study its natural frequency, stress and displacement distribution was investigated in this paper. Combined with the rotor structure characteristics, a calculation model was established on the basis of anisotropy symmetric theory. The analytic formulas with flywheel rotor at working speed were obtained. Established the finite element model of the rotor. The radial , hoop stress, radial displacement and dynamic characteristics at a random point were analyzed completely．The results indicate that the safety factor and the natural frequency meet the design requirements.

Sign in / Sign up

Export Citation Format

Share Document