Dynamic Characteristics Analysis of Tower Columns of Ship Lift System

2011 ◽  
Vol 94-96 ◽  
pp. 531-534 ◽  
Author(s):  
Hong Wei Ma ◽  
Ji Wei Wang ◽  
Ji Xiang Xu ◽  
Xiao Qiu Ding
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Seismic Waves ◽  
Element Model ◽  
High Rise ◽  
Characteristics Analysis ◽  
Design Requirements ◽  
Ship Lift ◽  
Hydro Project ◽  
Dynamic Characteristics Analysis

Based on the Xiangjiaba Hydro Project, dynamic characteristics of large high-rise structure under El_Centro seismic wave were investigated in this paper. 8-node hexahedral isoparametric elements[1] are used to the solid element in the 3-D finite element model. In order to increase the efficiency of the calculation, the Newmark- [2] method is implemented. By means of seismic waves, the displacement responses of the Xiangjiaba Hydro Project are analyzed in detail. The results, which are obtained for displacement responses of tower columns of ship lift, show that calculated dynamic results of the tower column can meet the design requirements.

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 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.

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.

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.

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.

Dynamic Characteristics Analysis of Spiral Bevel Gearbox Used in Ship Lift Synchronization System

2013 ◽  
Vol 483 ◽  
pp. 182-185
Author(s):  
Teng Jiao Lin ◽  
Ze Yin He ◽  
Fei Yu Geng ◽  
Hong Jun Que
Keyword(s):  
Element Model ◽  
Gear System ◽  
Transmission Model ◽  
Structure Model ◽  
Vibration Displacement ◽  
Synchronization System ◽  
Characteristics Analysis ◽  
Ship Lift ◽  
Spiral Bevel ◽  
Dynamic Characteristics Analysis

A dynamic finite element model of a coupled gear-rotor-bearing-housing gear system is developed by combining the gearbox transmission model with the housing structure model of spiral bevel gearbox used in ship lift synchronization system with taking stiffness excitation, error exaction and meshing impact exaction as the dynamic excitation. The intrinsic modes and vibration response are calculated, and then the modal frequency, mode shape, vibration displacement, velocity and acceleration of the gearbox are obtained to achieve the goal of prediction on vibration severity. In fact, the proposed approach not only provides a more comprehensive understanding of spiral bevel gearbox, but also can serve as the basis for vibration control of gear system used in ship lift synchronization system.

Static and Dynamic Characteristics Analysis of a High Speed CNC Lathe Feeding System

2012 ◽  
Vol 472-475 ◽  
pp. 2052-2058
Author(s):  
Ping Liao ◽  
Fang Ping Deng ◽  
Rui Ming Ding ◽  
Yu Xin Wu
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Element Model ◽  
Feeding System ◽  
Test Results ◽  
Static And Dynamic Characteristics ◽  
Cnc Lathe ◽  
Characteristics Analysis ◽  
Stress And Deformation

This paper focuses on the static and dynamic characteristics of a high speed CNC lathe feeding system, which is analyzed by using the Finite Element Method (FEM). In this study, the location of the maximum stress and deformation is demonstrated and checked, natural frequency and corresponding vibration modes is extracted and analyzed respectively, and the way to build finite element model is simply conducted. Furthermore, vibration testing of the feeding system in X, Y, Z-Direction is carried out respectively, both the theoretical analysis and test results show good agreement with each other. Finally, some conclusions and reviews are made based on the analysis results, which provide some reliable basis for the reasonable operation and static and dynamic characteristics’ improvement for the feeding system.

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