Utilizing element properties, structural stiffness and mass matrices are generated for as many as twenty harmonics and stored on magnetic tape. Matrices generated constitute input data to be used by other stiffness of revolution programs. Variety of boundary and loading conditions can be employed without having to create new mass and stiffness matrices for each case

Haisler, W. E.

Tillerson, J. R.

English

NASA Technical Reports Server

February 1974	 B73-10446 
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Lyndon B. Johnson Space Center 
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Stiffness and Mass Matrices for Shells of Revolution (SAMMSOR II) 
The problem: 
A program to generate stiffness and mass matrices Therefore, a variety of boundary and loading conditions 
forishells of revolution was needed. can be employed without having to create new mass 
and stiffness -matrices for each case. 
The solution:. 
A program was written to accept a description of the Notes: 
structure, in terms of the coordinates and slopes of the 1. This program was written in FORTRAN IV for the 
nodes and the properties of the elements joining the CDC 6000 and IBM 360 series computers. 
nodes, and generate the required matrices. 2. Inquiries concerning this program should be directed 
to: 
How it's done: COSMIC 
For shells with simple geometries (such as cylinders, 112 Barrow Hall 
shallow caps, and hemispheres), shell geometry can be University of Georgia 
internally generated. Utilizing element properties, the Athens, Georgia 30602 
structural stiffness and mass matrices are generated for Reference: MSC-14494 
as many as twenty harmonics and stored on magnetic 
tape. The matrices generated constitute input data to be Source: J. R. Tillerson and W. E. Haider of 
used by other stiffness of revolution programs. One Texas A&M University 
advantage of creating. the stiffness and mass matrices under contract to 
in a separate program is that a variety of analyses can be Johnson Space Center 
performed on the I same shell configuration without (MSC-14494) 
having to determine the matrices more than once.
S
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Aeronautics and Space Administration. Neither the United States
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Stiffness and mass matrices for shells of revolution (SAMMSOR II)

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