In analysis, it is common practice to conceptualize structures, objects, and isolation systems as basic mass-spring-damper models, as depicted in Figure 42.1. All objects experience vibration when ...

A three dimensional seismic isolation system was developed and experimentally validated for high-voltage electric power transformers of weight in the range of 300 to 800kip. Although the validation ...

Actual automobile crash scenarios include "wheels-first" landings after the vehicle leaves the road surface and becomes momentarily airborne. These events generate a vertical acceleration vector in a ...

Imagine holding a yardstick at one end. When you flex your wrist even the tiniest bit, the far end of the yardstick whips back and forth. But if you hang a small weight on a spring at that far end, ...