Virtual Prototype and Modal Analysis of Stator System of Large Turbo-Generator

2012 ◽  
Vol 190-191 ◽  
pp. 232-236
Author(s):  
Yi Xuan Wang ◽  
Ying Wang ◽  
Li Lin
Keyword(s):  
Modal Analysis ◽  
Element Model ◽  
Virtual Prototype ◽  
Virtual Manufacturing ◽  
Prototype Model ◽  
Research Approach ◽  
Outer Diameter ◽  
Stator Core ◽  
Turbo Generator ◽  
On Line

The stator core is an important part of large turbo-generator .The its natural frequency must be to avoid the operating frequency and the double frequency. In this paper, stator core structure of 1000MW generator is considered as the research object. In the Pro / E software, its virtual manufacturing model is built for design and manufacture of stator core; In ANSYS software, a parametric finite element model is established for virtual experimental modal analysis; The virtual prototype model in the different constraints (free, and different constraints) and different core parameters (such as the core inner and outer diameter, length) is used to analyze and solve its natural frequencies and mode shape changes. For design, manufacturing and on-line monitoring and fault diagnosis of a variety of large-capacity turbine generator, the research approach and results provide an important basis.

The Dynamic Design of Mechanical Structures of CNC Milling Machine Based on Virtual Prototyping

2012 ◽  
Vol 220-223 ◽  
pp. 410-413
Author(s):  
Yi Xuan Wang ◽  
Duan Li ◽  
Ying Wang ◽  
Yan Li Guo ◽  
Xu Chen
Keyword(s):  
Modal Analysis ◽  
System Modeling ◽  
Virtual Prototyping ◽  
Element Model ◽  
Prototype Model ◽  
Milling Machine ◽  
Cnc Milling ◽  
Cnc Milling Machine ◽  
Virtual Prototyping Technology ◽  
Design And Manufacture

In order to optimize the CNC milling machine structure, the system modeling, simulation, and virtual prototyping technology are used in this paper. It has built 3D virtual prototype model and finite element model of the upright post on Pro/E, ADAMS and ANSYS platforms respectively. The modal analysis of different rib column has been done. The top twenty frequencies and mode of those upright posts are calculated by ANSYS software. Through the modal analysis and compared with different column structure, the optimization column geometry is determined, and the main spindle speed should not be greater than 9000 r/min. These will provide important references for the general design and manufacture of the CNC milling machine.

Modeling and Simulation of Hydraulic Excavator Based on Virtual Prototype

2013 ◽  
Vol 785-786 ◽  
pp. 1147-1150
Author(s):  
Yi Jun Zhou ◽  
Wang Kan
Keyword(s):  
Characteristic Curve ◽  
Element Model ◽  
Virtual Prototype ◽  
Prototype Model ◽  
Stress And Strain ◽  
Hydraulic Excavator ◽  
Software Environment ◽  
Design And Optimization ◽  
Modern Engineering ◽  
Working Device

Hydraulic excavator plays a significant role in the modern engineering, it was bored complex and changing work stress and strain, its structural strength design directly affect the performance and reliability of the excavator. The virtual prototype technology can simulate all kinds of working conditions and achieve the ideal effect by optimizing parameters. In this paper, the 3D modeling of a hydraulic excavator was established using the Solidworks and converted into ADAMS software environment, added the constraints, the drives and loaded epigenetic reasonably and generated the main working parts of the virtual prototype model. The limit work trajectory displacement graph was given, and we obtained the change characteristic curve of the hinge point of the force at work. The static strength was analyzed by the finite element model in ANSYS, the stress and strain nephogram of the working device show that the reasonableness and correctness of the design, it provides a convenient and efficient means for the excavators design and optimization.

Numerical Analysis of Metro Station Construction by Large-Diameter Shield and Pile-Beam-Arch Method

2011 ◽  
Vol 368-373 ◽  
pp. 2711-2715 ◽  
Author(s):  
De Yun Ding ◽  
Xiu Ren Yang ◽  
Wei Dong Lu ◽  
Wei Ning Liu ◽  
Mei Yan ◽  
...  
Keyword(s):  
Ground Deformation ◽  
Large Diameter ◽  
Element Model ◽  
Construction Method ◽  
Shield Tunnel ◽  
Outer Diameter ◽  
Shield Tunneling ◽  
Metro Station ◽  
Dimensional Finite Element ◽  
New Construction

In more and more complicated urban building environment, a new construction method that metro engineering is constructed by large-diameter shield and shallow mining method can be regarded as a great attempt in China. By taking the Gaojiayuan station of Beijing metro line 14 as an engineering background, the main construction steps for the platform of the metro station built by a large-size shield with an outer diameter of 10 m and the Pile-Beam-Arch (PBA) method are introduced. Based on the soil-structure interaction theory, a two-dimensional finite element model is used to simulate the shield tunneling and the platform construction by the PBA method to enlarge the shield tunnel. The ground deformation and structural stress of the platform are predicted. The numerical results can be regarded as a valuable reference for the application of the new construction method in Beijing metro line 14.

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.

scholarly journals A Comprehensive Analysis on Transient Electromagnetic Force Behavior of Stator Windings in Turbo-Generator

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Hong-Chun Jiang ◽  
Yu-Ling He ◽  
Gui-Ji Tang ◽  
Ming-Xing Xu
Keyword(s):  
Electromagnetic Force ◽  
Mechanical Response ◽  
Comprehensive Analysis ◽  
Simplified Model ◽  
Force Density ◽  
Stator Core ◽  
Stator Windings ◽  
Fea Model ◽  
Transient Electromagnetic ◽  
Turbo Generator

This paper presents a comprehensive analysis on the transient electromagnetic force behavior of the stator windings in a QFSN-600-2YHG type turbo-generator. Different from other studies, this paper investigates not only the distribution regularities of the resultant force and the force density, but also the force harmonic characteristics, and the mechanical responses which will cause sensitive impact on the insulation wearing. The whole work is generally based on a proposed simplified model and the 3D finite element coupling calculation. The simplified model contains two parts. The first part is the theoretical model that employs the approximate solution of the image current to obtain the analytic formula of the electromagnetic force on the end windings conveniently. The second part is the FEA model that employs only the end windings and one-tenth of the stator core to save the calculating memory and, meanwhile, obtain the qualified electromagnetic force as well as the mechanical response. It is shown that the nose-top, the connection point between the line part and the end part, and the middle of the involute are the three most dangerous positions of the end winding to sustain serious insulation wearing. Moreover, the winding, which endures the maximum mechanical response, is neither always consistent with the one that has the largest resultant electromagnetic force nor directly in accordance with the winding that affords the most intensive electromagnetic force density. The findings in this paper will be beneficial for the insulation monitoring and the manufacturing improvement on the stator windings.

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