Document Type : Research Paper
Authors
1 Department of Civil Engineering, Bu-Ali Sina University, Hamedan, Iran
2 Genova University, Savona Compose, Genova, Italy,
Abstract
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.
Graphical Abstract
Keywords
- Precise integration method
- Single value decomposition
- Inversion of state matrix
- Spurious frequency
- Newmark average acceleration method
Main Subjects

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