3.6 Electro-Voice Structural-Analysis Procedures
Electro-Voice maintains a structural pull-test facility in Burnsville, Minnesota USA which includes load cells with digital-electronic display and recording. The load cells are calibrated annually by an in-dependent laboratory to a standard traceable to the United States National Bureau of Stan- dards. This pull-test facility is capable of pulling to destruction both individual rigging components and complete loudspeaker systems.
Electro-Voice utilizes state-of-the-art computer-modeling programs for structural analysis through- out the development of loudspeaker systems. The computer modeling enables the complex forces in the rigging components and enclosures to be analyzed for loudspeakers assembled into arrays in both static and dynamic conditions.
Structural testing and computer modeling were used throughout the engineering development of all the XLC individual rigging components and complete loudspeaker systems described in this manual. Testing and modeling involving both anticipated use and anticipated misuse were per- formed as part of the analysis. Engineering prototypes were stressed to failure and designs were revised based on those test results. Production systems and components were stressed to failure for verification of the final designs.