Updating of stator coil FE models using FEMtools

Research output: Book/ReportReport

Abstract

Dynamics of 3 different pieces of stator windings was studied as part of the FCEP research program. The goal of the study was to find an effective way to simulate the dynamics of stator windings accurately using finite element method (FEM) and to find out the unknown material parameters of the materials used in stator windings. The results of the simulations were verified using results of experimental modal analyses performed as part of the study. The material parameter values used in the simulations were updated manually to match the measurement results. The goal of this study was to improve the accuracy of the material parameter values defined in the previous study by automated model updating using FEMtools software. The model updating processes of the first two studied pieces of coil showed that the material parameter values defined in the previous study were accurate in general. The correlation criteria (average absolute difference between the measured and calculated natural frequencies) could be improved only by less than 0.1 %. Considering the third piece of coil, the correlation criteria was already relatively low (2.9 %) before the model updating process, but there was one mode shape pair with a difference of 14.6 % in the natural frequencies. As result of the model updating process, the greatest difference in the natural frequencies of a mode shape pair was reduced to 6.1 % and the correlation criteria was improved to 2.05 %.
Original languageEnglish
PublisherCLEEN Cluster for Energy and Environment
Number of pages32
ISBN (Print)978-952-5947-55-7
Publication statusPublished - 2014
MoE publication typeD4 Published development or research report or study

Fingerprint

Stators
Natural frequencies
Finite element method

Keywords

  • electrick generator
  • stator
  • coil
  • winding
  • copper
  • model update
  • FEMtools
  • finite element method
  • modal assurance criteria

Cite this

Junttila, J. (2014). Updating of stator coil FE models using FEMtools. CLEEN Cluster for Energy and Environment.
Junttila, Jukka. / Updating of stator coil FE models using FEMtools. CLEEN Cluster for Energy and Environment, 2014. 32 p.
@book{ddda39c14b1344ce87a9de683734d6be,
title = "Updating of stator coil FE models using FEMtools",
abstract = "Dynamics of 3 different pieces of stator windings was studied as part of the FCEP research program. The goal of the study was to find an effective way to simulate the dynamics of stator windings accurately using finite element method (FEM) and to find out the unknown material parameters of the materials used in stator windings. The results of the simulations were verified using results of experimental modal analyses performed as part of the study. The material parameter values used in the simulations were updated manually to match the measurement results. The goal of this study was to improve the accuracy of the material parameter values defined in the previous study by automated model updating using FEMtools software. The model updating processes of the first two studied pieces of coil showed that the material parameter values defined in the previous study were accurate in general. The correlation criteria (average absolute difference between the measured and calculated natural frequencies) could be improved only by less than 0.1 {\%}. Considering the third piece of coil, the correlation criteria was already relatively low (2.9 {\%}) before the model updating process, but there was one mode shape pair with a difference of 14.6 {\%} in the natural frequencies. As result of the model updating process, the greatest difference in the natural frequencies of a mode shape pair was reduced to 6.1 {\%} and the correlation criteria was improved to 2.05 {\%}.",
keywords = "electrick generator, stator, coil, winding, copper, model update, FEMtools, finite element method, modal assurance criteria",
author = "Jukka Junttila",
note = "Project code: 41976",
year = "2014",
language = "English",
isbn = "978-952-5947-55-7",
publisher = "CLEEN Cluster for Energy and Environment",

}

Junttila, J 2014, Updating of stator coil FE models using FEMtools. CLEEN Cluster for Energy and Environment.

Updating of stator coil FE models using FEMtools. / Junttila, Jukka.

CLEEN Cluster for Energy and Environment, 2014. 32 p.

Research output: Book/ReportReport

TY - BOOK

T1 - Updating of stator coil FE models using FEMtools

AU - Junttila, Jukka

N1 - Project code: 41976

PY - 2014

Y1 - 2014

N2 - Dynamics of 3 different pieces of stator windings was studied as part of the FCEP research program. The goal of the study was to find an effective way to simulate the dynamics of stator windings accurately using finite element method (FEM) and to find out the unknown material parameters of the materials used in stator windings. The results of the simulations were verified using results of experimental modal analyses performed as part of the study. The material parameter values used in the simulations were updated manually to match the measurement results. The goal of this study was to improve the accuracy of the material parameter values defined in the previous study by automated model updating using FEMtools software. The model updating processes of the first two studied pieces of coil showed that the material parameter values defined in the previous study were accurate in general. The correlation criteria (average absolute difference between the measured and calculated natural frequencies) could be improved only by less than 0.1 %. Considering the third piece of coil, the correlation criteria was already relatively low (2.9 %) before the model updating process, but there was one mode shape pair with a difference of 14.6 % in the natural frequencies. As result of the model updating process, the greatest difference in the natural frequencies of a mode shape pair was reduced to 6.1 % and the correlation criteria was improved to 2.05 %.

AB - Dynamics of 3 different pieces of stator windings was studied as part of the FCEP research program. The goal of the study was to find an effective way to simulate the dynamics of stator windings accurately using finite element method (FEM) and to find out the unknown material parameters of the materials used in stator windings. The results of the simulations were verified using results of experimental modal analyses performed as part of the study. The material parameter values used in the simulations were updated manually to match the measurement results. The goal of this study was to improve the accuracy of the material parameter values defined in the previous study by automated model updating using FEMtools software. The model updating processes of the first two studied pieces of coil showed that the material parameter values defined in the previous study were accurate in general. The correlation criteria (average absolute difference between the measured and calculated natural frequencies) could be improved only by less than 0.1 %. Considering the third piece of coil, the correlation criteria was already relatively low (2.9 %) before the model updating process, but there was one mode shape pair with a difference of 14.6 % in the natural frequencies. As result of the model updating process, the greatest difference in the natural frequencies of a mode shape pair was reduced to 6.1 % and the correlation criteria was improved to 2.05 %.

KW - electrick generator

KW - stator

KW - coil

KW - winding

KW - copper

KW - model update

KW - FEMtools

KW - finite element method

KW - modal assurance criteria

M3 - Report

SN - 978-952-5947-55-7

BT - Updating of stator coil FE models using FEMtools

PB - CLEEN Cluster for Energy and Environment

ER -

Junttila J. Updating of stator coil FE models using FEMtools. CLEEN Cluster for Energy and Environment, 2014. 32 p.