In UAI/NASTRAN , BDYS (and BDYS1) refers to Bulk Data entries used for defining boundaries in finite element modeling.
The 1-4x likely denotes a version range or a multiplier for assets (e.g., 1.4x scale or resolution). bdys-1-4x.7z
If you are looking to "generate a piece" based on this file's likely contents (technical engineering or data parameters), I can help you draft a , documentation snippet , or a data description . UAI/NASTRAN User's Reference Manual - Purdue Engineering In UAI/NASTRAN , BDYS (and BDYS1) refers to