Stability Analysis Research of Modified CD-Newmark Numerical Integral Method in Seismic Pseudo-Dynamic Test

Abstract:

The characteristics of explicit numerical integral method is without iteration, and the characteristics of inexplicit numerical integral method is unconditionally stable. The traditional CD-Newmark method has the shortcoming of the bigger upper frequency leads to a small time step, a modified combined integral method named MCD-Newmark release the fixed DOF of numerical substructure, then obtained the parameters range of stable condition of experimental substructure, and the unconditionally stable of numerical substructure is also researched,then the strict stability conditions of the traditional CD-Newmark algorithm is resolved. The study provides reference for structural seismic test.

• Periodical: Applied Mechanics and Materials (Volumes 638-640)
• Pages: 1869-1872
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.638-640.1869
• Online since: September 2014
• Authors: Xin Jiang Cai*, Shi Zhu Tian
• Keywords: Combined Methods, Numerical Integration, Pseudo-Dynamic, Seismic, Stability

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