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Introduction 
CDH/OPTRAN calculates response curves (FRFs), operational shapes, and participation factors of large Finite Element Models that have multiple loading conditions, but require data recovery at a limited number of grids. CDH/OPTRAN is a Matlab-based batch processing procedure. It works in conjunction CDH/AMLS to efficiently perform modal frequency response of large models. It is independent of Nastran DMAP after the computation of modes. The CDH/OPTRAN has several distinguishing features for efficient batch processing: 1. Output results in user-friendly formats, such as jpeg and tiff. Punch and ps are also available. 2. Define target lines and output only the responses that exceed the targets. 3. Generate operational shapes at critical peaks in the same run. 4. Compute panel participation factors efficiently. 5. Overlay graphs of multiple runs for comparison of responses due to design changes. The following scenario describes a typical usage: The user has a large FEA model that has a number of loading conditions, but requires data recovery at selected grids. The user has preset response targets and wishes to understand the behavior of the model where the responses are higher than the targets by examining the operational shapes and participation factors. The user also wishes to understand changes in response as design changes are made. Functionality
 Elapse Time Comparisons
System Requirements:
MSC NASTRAN is a proprietary product of MSC.Software Corporation MD NASTRAN is a proprietary product of MSC.Software Corporation NX-NASTRAN is a proprietary product of UGS Corporation |
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