An Improved Semi-Implicit Method for Structural Dynamics Analysis

[+] Author and Article Information
K. C. Park

Applied Mechanics Laboratory, Lockheed Palo Alto Research Laboratory, 3251 Hanover Street, Palo Alto, Calif., 94304

J. Appl. Mech 49(3), 589-593 (Sep 01, 1982) (5 pages) doi:10.1115/1.3162532 History: Received July 01, 1981; Revised January 01, 1982; Online July 21, 2009


A semi-implicit algorithm is presented for direct time integration of the structural dynamics equations. The algorithm avoids the factoring of the implicit difference solution matrix and mitigates the unacceptable accuracy losses which plagued previous semi-implicit algorithms. This substantial accuracy improvement is achieved by augmenting the solution matrix with two simple diagonal matrices of the order of the integration truncation error.

Copyright © 1982 by ASME
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