Random Vibration Tests for Prediction of Fatigue Life of Diffuser Structure for Gas Dynamic Laser
Abstract
Static and dynamic strain measurements which were taken during test stand operations of the gas dynamic laser (GDL) for the AF Airborne Laser Laboratory indicated that higher than expected vibrational stress levels may possibly limit the fatigue life of the laser structure. Particularly the diffuser sidewall structure exhibited large amplitude random vibrations which were excited by the internal gas flow. The diffuser structure consists of two layers of brazed stainless steel, AISI-347, panels. Cooling ducts were milled into the outer face sheet. These in turn are backed by the inner face sheet. So called T-rail stiffeners silverbrazed to the outer face sheets add the required stiffness and divide the sidewall into smaller rectangular plate sections.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1980
- Accession Number
- ADA409466
Entities
People
- D. L. Banaszak
- O. F. Maurer
Organizations
- Air Force Research Laboratory