Theses and Dissertations

Issuing Body

Mississippi State University


Janus, J. Mark

Committee Member

Thompson, David S.

Committee Member

Weed, Richard A.

Date of Degree


Document Type

Graduate Thesis - Open Access


Aerospace Engineering

Degree Name

Master of Science


James Worth Bagley College of Engineering


Department of Aerospace Engineering


A new point-projection method was developed to transfer loads and displacements in a two-way coupled fluid-structure interaction problem. The existing method involved projecting the load at each computational fluid dynamics (CFD) node onto a corresponding computation structural dynamics (CSD) element. The load is distributed to the CSD nodes on that element. However, the solution is not unique and will vary the projection. In the new method, a rigid pyramid element is built upon the CSD element and that encompasses the CFD node. Thus, the CFD load will be uniquely distributed to the CSD nodes. After the CSD code updates the CSD node location, the pyramid element can also be used to update the location of the CFD node. This work describes a FORTRAN routine that coupled LS-DYNA to Loci/BLAST and tests conducted to test the validation, work conservation, and robustness of the routine.