Abstract
For safety reasons, the measurements of nuclear piping temperature and stress variations during transients are mainly available in the outer side, while the highest values take place in the inner one. To solve this inverse problem, we propose a transfer function approach to link the spectra of inner and outer values. The unidimensional model, using an analytical identified transfer function, is carried out and checked in a real-like case. The results show that stress measurements are more reliable than temperature measurements for the estimation of inner temperature fluctuations. This is due to the integral effect, through thickness, of stress instead of the local effect of temperature. This method can also be used for 2D or 3D structures. However, in those cases, the transfer function cannot be estimated with analytical formulas. The transfer function is assessed by identification with the impulse response of the structure. (authors). 6 figs., 5 refs.
Citation Formats
Chau, T H, Morilhat, P, and Maye, J P.
Inverse methods in thermomechanics: application to an industrial case; Methodes inverses en thermomecanique: application a un cas industriel.
France: N. p.,
1993.
Web.
Chau, T H, Morilhat, P, & Maye, J P.
Inverse methods in thermomechanics: application to an industrial case; Methodes inverses en thermomecanique: application a un cas industriel.
France.
Chau, T H, Morilhat, P, and Maye, J P.
1993.
"Inverse methods in thermomechanics: application to an industrial case; Methodes inverses en thermomecanique: application a un cas industriel."
France.
@misc{etde_10138753,
title = {Inverse methods in thermomechanics: application to an industrial case; Methodes inverses en thermomecanique: application a un cas industriel}
author = {Chau, T H, Morilhat, P, and Maye, J P}
abstractNote = {For safety reasons, the measurements of nuclear piping temperature and stress variations during transients are mainly available in the outer side, while the highest values take place in the inner one. To solve this inverse problem, we propose a transfer function approach to link the spectra of inner and outer values. The unidimensional model, using an analytical identified transfer function, is carried out and checked in a real-like case. The results show that stress measurements are more reliable than temperature measurements for the estimation of inner temperature fluctuations. This is due to the integral effect, through thickness, of stress instead of the local effect of temperature. This method can also be used for 2D or 3D structures. However, in those cases, the transfer function cannot be estimated with analytical formulas. The transfer function is assessed by identification with the impulse response of the structure. (authors). 6 figs., 5 refs.}
place = {France}
year = {1993}
month = {Jan}
}
title = {Inverse methods in thermomechanics: application to an industrial case; Methodes inverses en thermomecanique: application a un cas industriel}
author = {Chau, T H, Morilhat, P, and Maye, J P}
abstractNote = {For safety reasons, the measurements of nuclear piping temperature and stress variations during transients are mainly available in the outer side, while the highest values take place in the inner one. To solve this inverse problem, we propose a transfer function approach to link the spectra of inner and outer values. The unidimensional model, using an analytical identified transfer function, is carried out and checked in a real-like case. The results show that stress measurements are more reliable than temperature measurements for the estimation of inner temperature fluctuations. This is due to the integral effect, through thickness, of stress instead of the local effect of temperature. This method can also be used for 2D or 3D structures. However, in those cases, the transfer function cannot be estimated with analytical formulas. The transfer function is assessed by identification with the impulse response of the structure. (authors). 6 figs., 5 refs.}
place = {France}
year = {1993}
month = {Jan}
}