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.OP4 File Extension

File TypeNastran Output File

DeveloperMSC Software
2.0 (1 Vote)
CategoryData Files

What is an OP4 file?

Output file created by MSC Nastran, a program that enables you to test the integrity of different structures such as buildings or spacecraft; generated by DMAP alters, which act like commands to extract information (like a matrix); can be written in Binary or ASCII format; contains vectors and matrices of that can be analyzed and output as a structure array by different Nastran readers.

More Information

The OP4 file is commonly used to exchange Craig Bampton models between different organizations for analysis. The model consists of large finite element models reduced into a set of small matrices (contained in the OP4 file) that contain mass, stiffness, and mode shape information which can then be connected to physical boundary points to test the low frequency response modes of the structure. The matrices are ideal for manipulation, which makes them easy to test in a wide range of analyses.

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Programs that open OP4 files
Updated 1/24/2014

About OP4 Files

Our goal is to help you understand what a file with a *.op4 suffix is and how to open it.

The Nastran Output file type, file format description, and Windows and Linux programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

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