DYNAMIC ENVIRONMENTAL CRITERIA
1. INTRODUCTION A “watershed” period of aerospace research and development occurred during the decade of the 1960s, often referred to as the Apollo era, providing major advances to the fields of structural dynamics and aeroacoustics. Toward the end of this era, efforts were made to document and summarize these developments [1.1 – 1.9]. Since then, many improvements and a few significant breakthroughs have been made to these technologies including:
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