Dynamic Characteristics Analysis of a Large Aqueduct

2011 ◽  
Vol 255-260 ◽  
pp. 1130-1133
Author(s):  
Bing Bai ◽  
Yu He Li ◽  
Xiao Shan Deng
Keyword(s):  
Seismic Design ◽  
Water Depth ◽  
Dynamic Characteristics ◽  
Natural Frequencies ◽  
Mode Shapes ◽  
Element Analysis ◽  
Characteristics Analysis ◽  
Practical Engineering ◽  
North Water ◽  
Dynamic Characteristics Analysis

By use of large finite element analysis software, dynamic characteristics analysis is carried out for an aqueduct in South-to-North Water Transfer Project. Westergaard method and Housner method are used respectively to simulate the water. The natural frequencies and mode shapes (wet) of the aqueduct structure are calculated under two kinds of water depths (designed water depth, half water depth). The results show that the influence of the water on the dynamic characteristics of the aqueduct is obvious. Natural frequencies decrease with the increases of the water depth. The distinction between the two methods was analyzed: Housner method is closer to the practical engineering because both the pulsation effect and the convection effect of the water are considered. The results and conclusions can be referenced for seismic design of large aqueduct.

Influence of Supports and Water Depths on Dynamic Characteristics of Aqueduct Structure

2011 ◽  
Vol 243-249 ◽  
pp. 4592-4595
Author(s):  
Xin Li Bai ◽  
Hai Li Su ◽  
Qian Pan
Keyword(s):  
Water Depth ◽  
Dynamic Characteristics ◽  
Mode Shape ◽  
Mode Shapes ◽  
Element Analysis ◽  
Characteristics Analysis ◽  
Simple Support ◽  
North Water ◽  
Completely Simple ◽  
Water Depths

In this paper, dynamic characteristics analysis is carried out for a large aqueduct of South-to-North Water Transfer Project using large finite element analysis software. Two kinds of connection supports are considered, namely elastic support and completely simple support. Six kinds of water depths are calculated by additional mass method: empty aqueduct, 1/4 water depth, 1/2 water depth, 3/4 water depth, designed water depth, full water depth. Results show that basin type rubber support strengthens the constraint to aqueduct, and strengthens the connection of aqueduct to pier, and also increases the system stiffness, therefore the natural frequency is higher than that of completely simple support; The influence of water to dynamic characteristics of the aqueduct is quite obvious, so water effect must be considered in computation; Water has no influence on the principal mode shapes of the aqueduct structure, i.e. the dry mode shape and the wet mode shape are similar in appearance.

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 the Mud Transfer Pump Rotor

2013 ◽  
Vol 455 ◽  
pp. 248-252
Author(s):  
Jun Yuan Sun ◽  
Ji Ming Xiao
Keyword(s):  
Dynamic Analysis ◽  
Modal Analysis ◽  
Dynamic Characteristics ◽  
Natural Frequencies ◽  
Mode Shapes ◽  
Dam Construction ◽  
Pump Rotor ◽  
Characteristics Analysis ◽  
Rotor Dynamic ◽  
Dynamic Characteristics Analysis

The mud pump damming technology is a new idea put forward for realization of mechanization and automation of warping dam construction. A mud pump damming machine is studied, the FEM of the mud transfer pump rotor is built, modal analysis and rotor-dynamic analysis are carried out, natural frequencies and mode shapes under different constraints are obtained and the critical speeds of the pump rotor are determined, which will provide reference to improve the running reliability of the mud transfer pump rotor.

Dynamic Characteristics Analysis of Stepped Circular Plates

2012 ◽  
Vol 446-449 ◽  
pp. 3619-3622
Author(s):  
Hai Yong Cai ◽  
Ying Zhang
Keyword(s):  
Dynamic Characteristics ◽  
Natural Frequencies ◽  
The Self ◽  
Mode Shapes ◽  
Axisymmetric Vibration ◽  
Circular Plates ◽  
Characteristics Analysis ◽  
Dynamic Characteristics Analysis

Natural frequencies and mode shapes of axisymmetric and non-axisymmetric vibration of stepped thin circular plates were calculated with self-programmed program. Three-node annular elements were used in the program.Results of axisymmetric vibration obtained by the self-programmed program and those by ANSYS program were compared.It shows that self-programmed program can calculate axisymmetric vibration as well as non-axisymmetric vibration.The accuracy of self-programmed program is higher than ANSYS method.

Static and Dynamic Characteristics Analysis of HTM125 Milling Complex Machining Center Column

2014 ◽  
Vol 1077 ◽  
pp. 191-196
Author(s):  
Yu Hou Wu ◽  
Yu Hang Ren ◽  
De Hong Zhao ◽  
Feng Lu
Keyword(s):  
Dynamic Characteristics ◽  
Three Dimensional ◽  
Mode Shapes ◽  
Three Dimensional Model ◽  
Static And Dynamic Characteristics ◽  
Machining Center ◽  
Characteristics Analysis ◽  
Object Of Study ◽  
Five Axis ◽  
Dynamic Characteristics Analysis

The column of heavy double turret five-axis horizontal milling complex machining center is taken as the object of study. Solidworks is used to establish three-dimensional model of milling machining center column, the established modal is be imported into ANSYS Workbench for static and dynamic characteristics analysis. First, by comparing the column deformation, the stress and strain under no-load and load conditions, which is concluded that column design is too conservative and be optimized. Secondly, the modal analysis was carried out on the column, which provides a theoretical basis for the optimization of the column by getting the first six natural frequencies and mode shapes of cloud.

Vibration Characteristics Analysis of an Aero-Engine Turbine Blade

2012 ◽  
Vol 487 ◽  
pp. 894-897
Author(s):  
Wei Qiang Zhao ◽  
Yong Xian Liu ◽  
Mo Wu Lu ◽  
Qing Jun Guo
Keyword(s):  
Optimal Design ◽  
Turbine Blade ◽  
Dynamic Characteristics ◽  
Natural Frequencies ◽  
Vibration Characteristics ◽  
Mode Shapes ◽  
Vibration Characteristic ◽  
Analysis Method ◽  
Aero Engine ◽  
Characteristics Analysis

This paper introduces the FEA method for a certain type of aero-engine turbine blade and makes a vibration characteristics analysis to this aero-engine turbine blade based on this method. The vibration characteristic of this aero-engine turbine blade is studied and the natural modal of the turbine blade is calculated based on UG software. The first six natural frequencies and mode shapes are given. According to the analysis results the dynamic characteristics of the blade are discussed. The analysis method and results in this paper can be used for further study on optimal design and vibration safety verification for the blade.

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.

Dynamic Characteristics Analysis and Topology Optimization of Column Based on Finite Element Method

2013 ◽  
Vol 721 ◽  
pp. 541-544
Author(s):  
Jing Chen ◽  
Ze Long Yang ◽  
Xian Xuan Li
Keyword(s):  
Finite Element ◽  
Topology Optimization ◽  
Frequency Response ◽  
Dynamic Characteristics ◽  
Natural Frequencies ◽  
Mode Shapes ◽  
Response Analysis ◽  
Response Curves ◽  
Element Analysis ◽  
Column Structure

Aiming to improve the dynamic and static characteristics of a type of machining center column, the finite element modal analysis and harmonic response analysis of the column are performed, and this paper analyzes the dynamic characteristics of the column based on the first five mode shapes and natural frequencies of the column and the displacement - frequency response curves of the column. Topology optimization analysis of the column is performed with ANSYS, and the finite element analysis is performed on the column again after the column structure is improved based on the optimal distribution of material of the column structure and the design experience of column. The result shows that the first five natural frequencies of the column increase, the peak of the displacement - frequency response of the column decrease, and the dynamic characteristics are improved significantly.

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.

Modal and Vibration Analysis of a Trator Frame Based on FEM

2013 ◽  
Vol 373-375 ◽  
pp. 16-19 ◽  
Author(s):  
Kang Li Shao ◽  
Feng Wang ◽  
Yong Hai Wu
Keyword(s):  
Modal Analysis ◽  
Dynamic Characteristics ◽  
Vibration Analysis ◽  
Geometric Model ◽  
Excitation Frequency ◽  
Mode Shapes ◽  
Characteristics Analysis ◽  
Dynamic Characteristics Analysis

Modal analysis and vibration analysis is the foundation of dynamic characteristics analysis and it is the most important methods to analyze the inherent characteristics and mode shapes of the system. In this paper, the airport tractor frame is taken as the research object and its geometric model is established by Pro / E, 10 order modal and shapes of tractor frame is obtained by ANSYS. The results showed that: the first and second frequency of the frame is avoided the engine idling, the outbreak frequency, and excitation frequency in normal driving road. The entire frame meets the requirement of the dynamic characteristics.

Sign in / Sign up

Export Citation Format

Share Document