Evaluation of improved precise integration method in structural dynamics using single value decomposition technique

Akbari, J.; Mirzaei, S.

doi:10.22061/jcarme.2026.8939.2206

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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)
مقاله 1، دوره 15، شماره 1 - شماره پیاپی 29، مهر 2025، صفحه 1-16 اصل مقاله (994.86 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22061/jcarme.2026.8939.2206
نویسندگان
J. Akbari^* ¹؛ S. 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
Numerical techniques for solving dynamic structural problems often encounter significant challenges, including conditional stability, period elongation errors, amplitude decay errors, and the emergence of spurious frequencies. To address these issues, several first-order precise integration methods have been developed; however, these approaches still suffer from errors associated with the inversion of the state matrix. This study employs the singular value decomposition technique to enhance the efficiency of the precise integration method algorithm and eliminate the singularity of the state matrix. The robustness of the proposed method is evaluated across various transient dynamic problems. The results demonstrate that traditional approaches, such as the Newmark method, exhibit substantially larger errors—exceeding 150% in certain cases. Ultimately, the findings emphasize that accurately estimating the dynamic response of multi-degree-of-freedom systems under impact loading requires careful consideration. Conventional methods, including the Newmark average acceleration technique, should therefore not be applied indiscriminately.
کلیدواژه‌ها
Precise integration method؛ Single value decomposition؛ Inversion of state matrix؛ Spurious frequency؛ Newmark average acceleration method

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Evaluation of improved precise integration method in structural dynamics using single value decomposition technique