Citation
Abstract
The elevation-axis tie truss of the 70-m antennas would have to be modified to accommodate a centerline beam waveguide. To accomplish this, the center section of the tie truss has to be altered, causing a change in the tie-truss compliance and affecting structural performance. Even with the center section completely removed, the worst-case rms pathlength error due to gravity load is increased from 0.025 to only 0.030 inches. Using a simple postprocessor technique, the effects of modifying the compliance can be predicted without resorting to multiple and costly reanalyses of large finite-element models on a mainframe computer.
Details
- Volume
- 42-98
- Published
- August 15, 1989
- Pages
- 86–94
- File Size
- 388.1 KB