Dynamic Characteristics of Arch Steel Tower in Construction Stages

2014 ◽  
Vol 989-994 ◽  
pp. 3165-3168
Author(s):  
Li Yu ◽  
Yan Yang Che ◽  
Sen Wang ◽  
Guo Hui Zhao
Keyword(s):  
Dynamic Characteristics ◽  
Structural System ◽  
Ansys Software ◽  
Wind Induced Vibration

Based on Hangzhou Zhijiang Bridge, FEA models of arch steel tower in construction and completed stages are established by using ANSYS software. Before closed and completed are considered to compute the dynamic characteristics of different structural system for arch steel tower. The results show that the wind-reduced vibration can be generated easily. It can cause some bad effect on the construction, equipments and the safety of staff. So, some proper measures should be adopted to decrease the wind-induced vibration of arch steel tower in construction and completed stages. So, some meaningful references are provided for the further research on control of wind-Induced vibration for arch steel tower.

Dynamics Characteristics for Contact Surface of Machine Tool

2014 ◽  
Vol 538 ◽  
pp. 91-94
Author(s):  
Wei Ping Luo
Keyword(s):  
Machine Tool ◽  
Dynamic Characteristics ◽  
Contact Surface ◽  
Dynamic Performance ◽  
Virtual Prototype ◽  
Prototype Model ◽  
Ansys Software ◽  
Dynamic Analyses ◽  
Contact Surfaces

A virtual prototype model of Machine Tool has been constructed by using the Pro/E software and the ANSYS software. Considering the effects of contact surfaces, dynamic analyses of Machine Tool are studied. The effects of contact surfaces on the dynamic characteristics of machine tool are studied. So that the purpose predicting and evaluating synthetically the machine tool dynamic performance without a physical sample can be achieved.

Investigation into the dynamic characteristics of downhole perforation tools with multiple shock absorbers

2019 ◽  
Vol 20 (6) ◽  
pp. 622
Author(s):  
Xiaoqiang Guo ◽  
Jun Liu ◽  
Guorong Wang ◽  
Qingyou Liu ◽  
Xianming Song
Keyword(s):  
Dynamic Characteristics ◽  
Field Experiments ◽  
Shock Absorber ◽  
Response Amplitude ◽  
Ansys Software ◽  
Maximum Acceleration ◽  
Shock Absorbers ◽  
Tubing String ◽  
Testing Instruments ◽  
Multiple Shock

The use of large-charged perforating bullets after well perforation produces large impact loads, which can easily lead to early unsealing of packers, damage to testing instruments, stress failure of tubing strings, buckling deformation, and other adverse incidents. This study focuses on the safety of large-charged perforating bullets used in downhole tools. In addition, a dynamic model of downhole perforation tools with multi-shock absorber was designed, and ANSYS software was used to validate its accuracy. Perforation impact loading field experiments were developed, and the loading pressure was measured over time to obtain an even more accurate equation to calculate loading. Analysis of the effects of different numbers of shock absorbers on the dynamic characteristics of downhole tools was conducted, finding that increasing the number of shock absorbers from one to two significantly decreased the dynamic response amplitude of the downhole tools (displacement, axial force, and packer force). However, when the number was increased to three, the change in response amplitude was not significant. Based on the maximum acceleration of each section of the tubing string, the testing instrument is best installed at its upper end. As the number of shock absorbers is increased, the number of regions of the tubing string that undergo buckling deformation decreases. Increasing the number of shock absorbers helps prevent buckling deformation in the tubing string, and increases its service life.

scholarly journals Dynamic Characteristics of Hanging Truss Having Shape Memory Alloy Wires

2017 ◽  
Vol 7 (2) ◽  
pp. 6 ◽  
Author(s):  
Xuan Zhang ◽  
Kazuyuki Hanahara ◽  
Yukio Tada
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Dynamic Characteristics ◽  
Dynamic Problem ◽  
Vibration Isolation ◽  
Mechanical Characteristics ◽  
Structural System ◽  
Vibration Attenuation ◽  
Calculation Process ◽  
Absorption Characteristics

In this study, we discuss the dynamics of a type of hanging truss structural system consisting of rigid and wire members, part of which are SMA (shape memory alloy) wires. This kind of truss structure has the capability of vibration isolation and absorption. Characteristics of zero compressive stiffness of wire members, SMA wire members and hanging configuration of the structure itself contribute to the effect of vibration isolation. The hysteretic loop of SMA wires plays a significant role in vibration attenuation. Mathematical models for this kind of dynamic problem are developed. Calculation process is introduced to take into account the mechanical characteristics of SMA and wire members. Dynamic characteristics are discussed; simultaneously, the effects of vibration isolation and attenuation have been confirmed. On the basis of the numerical calculations, advantages of combinations of various types of wire members, including the truss units having no bracing wires have been demonstrated. 

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.

The Effects of Stingers on Receptance Function Measurements

1996 ◽  
Vol 118 (2) ◽  
pp. 220-226 ◽  
Author(s):  
Jyh-Chiang Lee ◽  
Yuan-Fang Chou
Keyword(s):  
Cantilever Beam ◽  
Axial Force ◽  
Dynamic Characteristics ◽  
Force Transducer ◽  
Test Structure ◽  
Trial And Error ◽  
Structural System ◽  
Synthesis Algorithm ◽  
System A ◽  
Test Errors

When using a shaker to conduct receptance function measurements, it is usual to put a stinger between the shaker and a force transducer that is attached to a test structure. Ideally, a stinger can transmit desired axial force to excite the structure and isolate excitations in all other DOFs in order not to bias the testing results. The selections of stingers were made by trial-and-error, by chance, or by experience. This may cause test errors especially when the magnitude of receptance function of the excitation system is significant compared with that of the structural system at the correspondent frequency. In this work, substructure synthesis algorithm was used to calculate the effects of stingers on the receptance function measurements. The dynamic characteristics of a shaker, a shaker suspension system, a stinger, and a test structure were considered in the analysis. If the shaker is fixed, the method can predict the effects of the stinger on measured receptance functions. Finally, a cantilever beam and seven different sizes of stingers were used to verify this method. Good agreements were found between the predictions and testing results.

Influence of structural system measures on the dynamic characteristics of a multi-span cable-stayed bridge

2014 ◽  
Vol 52 (1) ◽  
pp. 51-73 ◽  
Author(s):  
Fangfang Geng ◽  
Youliang Ding ◽  
Hongen Xie ◽  
Jianyong Song ◽  
Wanheng Li
Keyword(s):  
Dynamic Characteristics ◽  
Structural System ◽  
Cable Stayed Bridge

Numerical Simulation Analysis of Dynamic Characteristics of the Floor Partial Discontinuous Building

2014 ◽  
Vol 933 ◽  
pp. 323-325
Author(s):  
Ming Mei Jiang
Keyword(s):  
Numerical Simulation ◽  
Dynamic Characteristics ◽  
Simulation Analysis ◽  
Frame Structure ◽  
Ansys Software

Taking the frame structure of a floor partial discontinuity as an example, the paper using ANSYS software, analyzed dynamic characteristics of the structure, discussed the influence of floor openings size on the period of the structure, which provided reference for the design of floor partial discontinuity building.

Analysis of Dynamic Characteristics of Space Deployable Antenna Based on ANSYS

2010 ◽  
Vol 37-38 ◽  
pp. 127-130
Author(s):  
Da Ke Tian ◽  
Rong Qiang Liu ◽  
Zong Quan Deng ◽  
Hong Wei Guo
Keyword(s):  
Finite Element ◽  
Natural Frequency ◽  
Dynamic Characteristics ◽  
Optimization Design ◽  
Element Model ◽  
Truss Structure ◽  
Vibration Modes ◽  
Ansys Software ◽  
Dynamic Modification ◽  
The Finite Element Model

Analysis of dynamic characteristics is one of the important parts of structure analysis for space deployable antenna. In order to study the dynamic characteristics of truss structure for space deployable truss antenna, according to the structure composition, the finite element model of truss structure is built by using ANSYS software, and the modal analysis is carried out by finite element method, then the natural frequencies and the features of vibration modes are obtained. It is emphatically analyzed that the influence of structure parameters such as chords, vertical beams, diagonal beams and crossing cables on the first natural frequency, and the change curves of natural frequency are given. The results can provide the theoretical basis for the antenna’s structural optimization design and dynamic modification.

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