کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5477938 | 1399247 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Modification of the fast fourier transform-based method by signal mirroring for accuracy quantification of thermal-hydraulic system code
ترجمه فارسی عنوان
اصلاح روش مبتنی بر تبدیل فوریه سریع با استفاده از سیگنال برای اندازه گیری دقیق کد سیستم حرارتی هیدرولیک
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کلمات کلیدی
فرکانس برش، روش سریع مبادله فوریه با استفاده از آینه سازی سیگنال، ارزیابی وابسته به فرکانس،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
چکیده انگلیسی
A thermal-hydraulic system code is an essential tool for the design and safety analysis of a nuclear power plant, and its accuracy quantification is very important for the code assessment and applications. The fast Fourier transform-based method (FFTBM) by signal mirroring (FFTBM-SM) has been used to quantify the accuracy of a system code by using a comparison of the experimental data and the calculated results. The method is an improved version of the FFTBM, and it is known that the FFTBM-SM judges the code accuracy in a more consistent and unbiased way. However, in some applications, unrealistic results have been obtained. In this study, it was found that accuracy quantification by FFTBM-SM is dependent on the frequency spectrum of the fast Fourier transform of experimental and error signals. The primary objective of this study is to reduce the frequency dependency of FFTBM-SM evaluation. For this, it was proposed to reduce the cut off frequency, which was introduced to cut off spurious contributions, in FFTBM-SM. A method to determine an appropriate cut off frequency was also proposed. The FFTBM-SM with the modified cut off frequency showed a significant improvement of the accuracy quantification.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Engineering and Technology - Volume 49, Issue 5, August 2017, Pages 1100-1108
Journal: Nuclear Engineering and Technology - Volume 49, Issue 5, August 2017, Pages 1100-1108
نویسندگان
Tae Wook Ha, Jae Jun Jeong, Ki Yong Choi,