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STATIC FIRING EQUIVALENT IMPEDANCE
Appendix AAn Introduction to Mechanical Impedance
1000 FREQUENCY cps acceleration Aeronautics and Space analyzing this phenomenon antiresonance cell and provided concept has proved D-1681 National Aeronautics damping design parameters dynamic character Equation firing arrangement completely firing assembly presented firing bay wall Flight levels gives a soft Hartenstein and William higher frequency range impedance analysis Impedance circuit impedance function IMPEDANCE STUDY O1 Langley Research Center MASS lb mechanical impedance concept MECHANICAL IMPEDANCE STUDY method of analyzing misinterpretation of vibration motor and roll-rig NASA NASA TN NASA TECHNICAL NOTE OSCILLOGRAPH OSCILLOSCOPE OTS price phase angle phase shift plausible method provided excellent correlation Raymond G report indicates revealed the dynamic roll rig gives roll-rig firing assembly shown in Figure soft spring effect Space Administration static firing arrangement static firing data straightforward and plausible STUDY O1 T68 study revealed TECHNICAL NOTE D-1681 thrust cell mounted TN D-1681 National unaccounted velocity vibration levels especially William G X-259 rocket motor