scholarly journals Dynamic Characteristic Analysis of a Power Turbine Rotor System Based on Finite Element Method

2018 ◽  
Author(s):  
Yi DING ◽  
Gui-huo LUO ◽  
Peng ZHANG
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Characteristic ◽  
Turbine Rotor ◽  
Rotor System ◽  
Characteristic Analysis ◽  
Power Turbine ◽  
Element Method

Static and Dynamic Characteristic Analysis of the Tower for Vertical Axis Wind Turbine Based on Finite Element Method

2012 ◽  
Vol 229-231 ◽  
pp. 613-616
Author(s):  
Yan Jue Gong ◽  
Yuan Yuan Zhang ◽  
Fu Zhao ◽  
Hui Yu Xiang ◽  
Chun Ling Meng ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Wind Turbine ◽  
Dynamic Characteristic ◽  
Optimization Design ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Characteristic Analysis ◽  
Support Structure ◽  
Element Method

As an important part of the vertical axis wind turbine, the support structure should have high strength and stiffness. This article adopts finite element method to model a kind of tower structure of the vertical axis wind turbine and carry out static and modal analysis. The static and dynamic characteristic results of tower in this paper provide reference for optimization design the support structure of wind turbine further.

Dynamic Characteristics Analysis and Optimization Design of a Simulated Power Turbine Rotor Based on Finite Element Method

2020 ◽  
Vol 37 (1) ◽  
pp. 31-39 ◽  
Author(s):  
Jia Shengxi ◽  
Zheng Longxi ◽  
Jingjing Huang ◽  
Qing Mei
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Characteristics ◽  
Optimization Design ◽  
Turbine Rotor ◽  
Design Tool ◽  
Two Stage ◽  
Power Turbine ◽  
Turbine Disks ◽  
Element Method

AbstractThe vibration optimum design for a simulated power turbine rotor without blades on the disk by using an optimization method based on the finite element method is described in this paper. The installation position of the two-stage turbine disks is chosen as design variables under the constraints of feasible regions for the critical speeds of the rotor. The objective functions are to minimize the transient response of the acceleration at the bearings and the amplitude of the disks. Predictions of the dynamic characteristics of the rotor are obtained by using ANSYS code. The optimization problem is solved by using commercial optimization code ISIGHT. The optimum installation position of the two-stage turbine disks is determined after optimization design. Experimental tests under the optimized structure show that the amplitude of the two-stage turbine disks which are recognized as the most concerned optimization objectives are reduced by 59 % and 56 % respectively in comparison with the comparative structure. The encouraging results demonstrate the potential of the presented method as an engineering design tool and also lay a foundation for the design of the real power turbine rotor used in turbo-shaft engine.

FEM Analysis for Seismic Performance of Large Aqueduct Structure with Different Bent-Height

2012 ◽  
Vol 170-173 ◽  
pp. 1837-1841
Author(s):  
Qiu Hua Duan ◽  
Lu Feng Yang ◽  
Meng Lin Lou
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Dynamic Characteristic ◽  
Seismic Performance ◽  
Dynamic Stress ◽  
Water Pressure ◽  
Fem Analysis ◽  
Stress Reaction ◽  
Coupling Structure ◽  
Element Method

This paper mainly uses finite element method (FEM) to research how the bent-height influence on dynamic characteristic, acceleration reaction, dynamic water pressure, dynamic stress reaction of the aqueduct-water coupling structure seismic performance. Through calculation and analysis some significant results were obtained.

Torque Characteristic Analysis of an IM/PM Hybrid Motor by Using Finite Element Method

2014 ◽  
Vol 792 ◽  
pp. 337-342 ◽  
Author(s):  
Shingo Iwao ◽  
Takashi Todaka ◽  
Masato Enokizono
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Induction Motor ◽  
Permanent Magnets ◽  
Two Dimensional ◽  
Characteristic Analysis ◽  
Dimensional Finite Element ◽  
Terminal Voltage ◽  
Hybrid Motor ◽  
Element Method

This paper presents torque characteristic analysis of synchronous induction motors called “IM/PM hybrid motors” by using the two-dimensional finite element method taking terminal voltage into account. The slip characteristics are analyzed by using multi-meshes corresponding to each rotor position, because the transient numerical analysis is quite difficult due to slip even two-dimensional analysis. There are many researches on IM/PM hybrid motors, however the torque characteristics when they are operating as an induction motor have not yet examined sufficiently. In this paper, we tried to explore how to improve the torque characteristics even operating as an induction motor by incorporating the embedded permanent magnets. The results show that the arrangement of the permanent magnets is very important to improve whole torque characteristics.

scholarly journals Characteristic Analysis of a Double Squirrel-Cage Induction Motor by Finite Element Method

2003 ◽  
Vol 123 (4) ◽  
pp. 344-349
Author(s):  
Takeshi Matsusaka ◽  
Kazurou Harada ◽  
Yoshiyuki Ishihara ◽  
Toshiyuki Todaka ◽  
Shingo Kitamura ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Induction Motor ◽  
Characteristic Analysis ◽  
Squirrel Cage ◽  
Squirrel Cage Induction Motor ◽  
Cage Induction Motor ◽  
Element Method

Dynamic Analysis of an Unsymmetrical Rotor Supported by Oil Film Bearing

2003 ◽  
Author(s):  
Zhansheng Liu ◽  
Senlin Huang ◽  
Jiexian Su ◽  
Songbo Xia
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Boundary Conditions ◽  
Dynamic Analysis ◽  
Dynamic Characteristic ◽  
Experimental Results ◽  
Oil Film ◽  
Oil Whirl ◽  
Element Method

Unsymmetrical rotor is a type of rotor widely used in engineering, which has different characteristic from symmetrical rotor and is less stable especially. With application to finite element method and Newmark-β method, dynamic characteristic of symmetrical rotor and three types of unsymmetrical rotor are investigated. The numerical and experimental results show that, in the same boundary conditions, speeds of oil whirl and whip are decreasing with the increase of stiffness asymmetry, and become less stable.

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