Optimization method for controlling vibration of combined cycle unit by adjusting bearing elevation

A combined cycle unit and optimization method technology, applied in the field of numerical simulation, can solve problems such as increasing calculation time and computer resource requirements

Active Publication Date: 2017-11-10
XI AN JIAOTONG UNIV +1
View PDF6 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the existence of nonlinear bearing oil film force, the traditional calculation method of shafting cannot simulate the influence of bearing elevation on the vibration characteristics of shafting
In addition, due to the existence of the asymmetrical motor rotor, the finite element method must establish a three-dimens...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optimization method for controlling vibration of combined cycle unit by adjusting bearing elevation
  • Optimization method for controlling vibration of combined cycle unit by adjusting bearing elevation
  • Optimization method for controlling vibration of combined cycle unit by adjusting bearing elevation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0077] The implementation of the method will be described in detail below with reference to the drawings and examples.

[0078] see figure 1 As shown, the present invention is an optimization method for controlling the vibration of a combined cycle unit by adjusting the bearing elevation, including the following seven steps:

[0079] 1) The embodiment of the present invention adopts such as figure 2 The shafting of the gas-steam combined cycle heating unit shown, the model has 8 bearings, and the density of the model is 7810kg / m 3 , the modulus of elasticity is 200GPa, and Poisson's ratio is 0.3. The shaft system is divided into the first substructure and the second substructure with the SSS clutch as the boundary, and the degrees of freedom of each substructure are divided into three categories: x i Indicates the internal degree of freedom, x SSS Indicates the degree of freedom at the connection of the SSS clutch, x BRG Indicates the degree of freedom at the bearing.

...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an optimization method for controlling vibration of a combined cycle unit by adjusting the bearing elevation. The method comprises the steps that 1, substructure partitioning is conducted; 2, coefficients after the bearing elevation changes are solved; 3, a motion equation at any revolving speed is determined and established according to a fast system matrix algorithm; 4, degree-of-freedom reduction is conducted according to a fixed interface modal synthesis method; 5, system synthesis is conducted, and a motion equation after reduction is established; 6, steady-state response solution is conducted on a reduction system; 7, an optimization model is built; and 8, an optimization model is solved by adopting a genetic algorithm. According to the optimization method, the fast system matrix algorithm at any revolving speed is developed, bearing parameters are calculated by adopting a difference model, degree-of-freedom reduction is conducted according to the modal synthesis method, the requirement on computer resources is reduced, the solution speed is increased, and the optimization model is solved by adopting the genetic algorithm finally. The optimization method has the advantages of being high in calculation speed, saving calculation resources and the like.

Description

technical field [0001] The invention belongs to the numerical simulation technical field of a turbomachinery rotor bearing system, and in particular relates to an optimization method for controlling the vibration of a combined cycle unit by adjusting the bearing elevation. Background technique [0002] In the gas-steam combined cycle heating unit, in order to maximize the heat supply of the unit, the SSS clutch technology can be used and placed between the medium pressure rotor and the low pressure rotor. By controlling the engagement and disengagement of the SSS clutch, the unit can be switched between the condensate heating condition and the pressure heating condition. The separation of the SSS clutch corresponds to the condensate heating condition and the back pressure heating condition, and the engagement Correspondingly, the back pressure heating condition is converted to the condensate heating condition. Theoretical analysis and experimental research show that the exi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23G06F2111/10
Inventor 张荻郑召利谢永慧宋亚军黄葆华
Owner XI AN JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap