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Structural Engineering and Mechanics
  Volume 48, Number 5, December10 2013 , pages 711-736
DOI: https://doi.org/10.12989/sem.2013.48.5.711
 


New implicit higher order time integration for dynamic analysis
Javad Alamatian

 
Abstract
    In this paper new implicit time integration called N-IHOA is presented for dynamic analysis of high damping systems. Here, current displacement and velocity are assumed to be functions of the velocities and accelerations of several previous time steps, respectively. This definition causes that only one set of weighted factors is calculated from the Taylor series expansion which leads to a simple approach and reduce the computational efforts. Moreover a comprehensive study on stability of the proposed method i.e., NIHOA compared with IHOA integration which is performed based on amplification matrices proves the ability of the N-IHOA in high damping vibrations such as control systems. Also, wide range of numerical examples which contains single/multi degrees of freedom, damped/un-damped, free/forced vibrations from finite element/finite difference demonstrate that the accuracy and efficiency of the proposed time integration is more than the common approaches such as the IHOA, the Wilson-O and the Newmark-B.
 
Key Words
    numerical dynamic analysis; higher order time integration
 
Address
Javad Alamatian : Civil Engineering Department, Mashhad Branch, Islamic Azad University, Mashhad, Iran
 

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