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Evaluation of improved precise integration method in structural dynamics using single value decomposition technique | ||
| Journal of Computational & Applied Research in Mechanical Engineering (JCARME) | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 11 بهمن 1404 اصل مقاله (1.14 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22061/jcarme.2026.8939.2206 | ||
| نویسندگان | ||
| Jalal Akbari* 1؛ Samaneh Mirzaei2 | ||
| 1Department of Civil Engineering, Bu-Ali Sina University, Hamedan, Iran | ||
| 2Genova University, Savona Compose, Genova, Italy, | ||
| تاریخ دریافت: 23 فروردین 1401، تاریخ بازنگری: 08 بهمن 1404، تاریخ پذیرش: 11 بهمن 1404 | ||
| چکیده | ||
| The numerical techniques involve difficulties, e.g., conditional stability, period elongation error, amplitude decay error, and the appearance of spurious frequencies in solving dynamic structural problems. Recently, several first-order precise integration methods (PIM) have been introduced to overcome the mentioned problems; however, in these methods, the error of state matrix inversion still is a problem. This paper utilizes the capabilities of the singular value decomposition (SVD) technique to improve the efficiency of the PIM algorithm and remove the singularity of the state matrix. The robustness of the proposed method was investigated for various transient dynamic problems, and the results show that the error of traditional methods e.g. Newark is dramatically high and, in some cases, more than 150 %. Finally, the most important outcome of this research is that appropriate estimation of the dynamic response of MDF systems under impact loading requires careful attention, and the available methods e.g. Newmark average acceleration techniques should not be applied blindly. | ||
| کلیدواژهها | ||
| Precise integration method؛ Single value decomposition؛ Inversion of state matrix؛ Spurious frequency؛ Newmark average acceleration method | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 37 تعداد دریافت فایل اصل مقاله: 30 |
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