High Impact Shock Instrumentation and Measurements
Abstract
The nature of high impact shock characteristics and methods of measurement are discussed. An outline is included of types of apparatus used for shock measurements, together with the apparatus considered essential. Methods and circuits used for acceleration measurements are considered in detail. Quartz crystal type accelerometers are considered the best means for measuring high impact accelerations. Measurements of maximum acceleration obtained on an old cracked striking plate and a new striking plate of the Naval Research Laboratory Shock stand are compared. Differences are small. Measurements of maximum acceleration for top and end blows obtained on the shock stand at the Naval Research Laboratory are considerably higher than corresponding values determined by Westinghouse and General Electric for the machines at Schenectady, Philadelphia and East Pittsburgh. Probable reasons for this are discussed. An appendix is included in which motions of an elastically mounted weight , subjected to simple shock, are discussed in the light of the ordinary approximate theory of elasticity, and, more briefly in the light of elastic theory involving traveling stress waves.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 28, 1942
- Accession Number
- AD1166411
Entities
People
- Irwin Vigness
Organizations
- United States Naval Research Laboratory