Stint/CD: A stand-alone explicit time integration package for structural dynamics analysis

1981 ◽  
Vol 17 (9) ◽  
pp. 1285-1312 ◽  
Author(s):  
Philip Underwood ◽  
K. C. Park
Keyword(s):  
Structural Dynamics ◽  
Time Integration ◽  
Dynamics Analysis ◽  
Explicit Time Integration

An Improved Semi-Implicit Method for Structural Dynamics Analysis

1982 ◽  
Vol 49 (3) ◽  
pp. 589-593 ◽  
Author(s):  
K. C. Park
Keyword(s):  
Structural Dynamics ◽  
Truncation Error ◽  
Time Integration ◽  
Implicit Method ◽  
Dynamics Analysis ◽  
Accuracy Improvement ◽  
Implicit Algorithm ◽  
Solution Matrix ◽  
Difference Solution

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.

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