Mechanical Impedance Study of the X-259 Rocket Motor |
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5000 FREQUENCY cps acceleration Aeronautics and Space analyzing this phenomenon antiresonance cell and provided concept has proved D-1681 National Aeronautics damping decibels design parameters dynamic character Elsen 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 Langley Research Center M₁ M₂ mechanical impedance concept MECHANICAL IMPEDANCE STUDY method of analyzing misinterpretation of vibration motor and roll-rig NASA NASA TN NASA TECHNICAL NOTE OSCILLOGRAPH OTS price PHASE ANGLE degrees 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 spring constant static firing arrangement static firing data straightforward and plausible study revealed TECHNICAL NOTE D-1681 thrust cell mounted TN D-1681 National velocity vibration levels especially William G X-259 rocket motor