Numerical and Experimental Investigation on Parameter Identification of Time-Varying Dynamical System Using Hilbert Transform and Empirical Mode Decomposition
المؤلفون المشاركون
المصدر
Mathematical Problems in Engineering
العدد
المجلد 2014، العدد 2014 (31 ديسمبر/كانون الأول 2014)، ص ص. 1-15، 15ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2014-04-07
دولة النشر
مصر
عدد الصفحات
15
التخصصات الرئيسية
الملخص EN
This paper proposes an approach to identifying time-varying structural modal parameters using the Hilbert transform and empirical mode decomposition.
Definition of instantaneous frequency and instantaneous damping ratio based on Hilbert transform for single-degree-of-freedom (SDOF) system is first introduced.
The following is the definition of Hilbert damping spectrum from which the time-varying damping ratio of multi-degree-of-freedom (MDOF) system can be calculated.
Identification procedures for both instantaneous frequency and damping ratios based on their definition are then introduced.
Applicability of the proposed identification algorithm has been validated through several numerical examples.
The instantaneous frequency and damping ratios of SDOF system under free vibration and under sinusoidal and white noise excitation have been identified.
The proposed method is also applied to MDOF system with slow and sudden changing structural parameters.
The results demonstrate that when the system modal parameters are slowly changing, the instantaneous frequency could be easily and well identified with satisfied accuracy for all cases.
However, the instantaneous damping ratio could be extracted only when the system is lightly damped.
The damping results are better for free vibration situation than for the forced vibration cases.
It is also shown that the suggested method can easily track the abrupt change of system modal parameter under free vibration.
The proposed method is then applied to a 12-story short-lag shear wall structure model tested on a shaking table.
The instantaneous dynamic properties of the structure were identified and were then introduced as known parameters into a finite element model.
Comparisons with the numerical results using constant structural parameters demonstrate that the calculated structural responses using the identified time-varying parameters are much closer to the experimental results.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Chen, Jun& Zhao, Guanyu. 2014. Numerical and Experimental Investigation on Parameter Identification of Time-Varying Dynamical System Using Hilbert Transform and Empirical Mode Decomposition. Mathematical Problems in Engineering،Vol. 2014, no. 2014, pp.1-15.
https://search.emarefa.net/detail/BIM-481427
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Chen, Jun& Zhao, Guanyu. Numerical and Experimental Investigation on Parameter Identification of Time-Varying Dynamical System Using Hilbert Transform and Empirical Mode Decomposition. Mathematical Problems in Engineering No. 2014 (2014), pp.1-15.
https://search.emarefa.net/detail/BIM-481427
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Chen, Jun& Zhao, Guanyu. Numerical and Experimental Investigation on Parameter Identification of Time-Varying Dynamical System Using Hilbert Transform and Empirical Mode Decomposition. Mathematical Problems in Engineering. 2014. Vol. 2014, no. 2014, pp.1-15.
https://search.emarefa.net/detail/BIM-481427
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-481427
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر