کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6755942 | 509562 | 2015 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Modal analysis of multi-degree-of-freedom dynamic system based on non-stationary response data
ترجمه فارسی عنوان
تجزیه و تحلیل مودال سیستم پویایی چند درجه ای آزادی بر اساس داده های پاسخ غیر ثابت
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
In connection with the nonstationarity of the huge offshore structure monitoring data, a method of constructing structure free response based on the non-stationary response data is proposed. This method uses a unilateral moving average to stabilize loads and the response data in the dynamic model of the multi-degree-of-freedom (mdof) structure, analyzes spectral characteristics of moving averages in some orders, researches filtering effects when the order q=1 (difference) and q>1 and constructs the free vibration equation of the structure by the random decrement technique (RDT). Through the identification of the second-order linear system simulation model, a comparison of modal parameters with the theoretical values is given, which are identified by different methods, and it shows good effects on the analysis of non-stationary response data using this method. Finally, the method is applied to the mode identification of the Floating Production Storage and Offloading (FPSO) single-point mooring structure, the distribution of the modal parameters of single-point mooring structure is analyzed and modal parameters identified by different values of q are compared.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Sound and Vibration - Volume 347, 7 July 2015, Pages 139-149
Journal: Journal of Sound and Vibration - Volume 347, 7 July 2015, Pages 139-149
نویسندگان
Da Tang, Zhihao Wang, Qianjin Yue, Zhongmin Shi, Jiaguo Feng,