Application of the shock response spectrum to some automotive crashworthiness problems

The shock response spectrum approach has been used to show that there is not best deceleration pulse for frontal barrier impact, but that in the 8 to 12 Hz frequency range of current restraint systems, the idealized square wave does appear to offer significant reduction in peak deceleration response for the fully restrained occupant. The spectrum has also been used to show that over the speed range, a hydraulic cylinder velocity- sensitive front end is much better for occupant response than a crushable honeycomb constant- force device.