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Information × Registration Number 0308U003523, 0107U011586 , R & D reports Title Supporting the development of the Cyclon-4 space launch vehicle units. Determination of dynamic loads (longitudinal vibration acceleration) of the Cyclon-4 Structure and various spacecraft under longitudinal vibration popup.stage_title Супроводження розробки вузлів РКП "Циклон-4". Визначення динамічних навантажень (поздовжніх віброприскорень) на конструкції РКП "Циклон-4" і КА різних типів при поздовжніх коливаннях РКП Head Pylypenko Viktor Vasyl'ovych, Registration Date 22-04-2008 Organization Institute of Technical Mechanics of NASU and NSAU popup.description2 Longitudinal oscillations linear and nonlinear mathematical models of the dynamical the first stage LRP the Cyclon-4 SLV body system, developed at ITM, NASU&NSAU, are improved considering variations in the design of the Cyclon-4 SLV elements after an initial design to analyze the Cyclon-4SLV longitudinal stability and to determine dynamical loads (longitudinal vibration accelerations) on the Cyclon-4 SLV structure. Free longitudinal oscillations of a modified structure of the third stage as a complicated 3D hydromechanical system with cavities filled by fluid and free longitudinal oscillations of the Cyclon-4 SLV body structure are modeled mathematically based on a elastic and mass schematic considering distributions of the mass and stiffness of the structure on the rocket length. Parameters of natural longitudinal oscillations of the Cyclon-4 SLV body structure with various-mass spacecraft and determined using dynamical characteristics of the third-stage structure. The longitudinal stability of the Cyclon-4 SLV is analyzed theoretically and amplitudes of longitudinal oscillations (longitudinal vibration accelerations) of the Cyclon-4 SLV are derived. If is shown the calculated values of longitudinal vibration accelerations of a spacecraft do not exceed their allowed level, and consequently, special-purpose measures on decrease a level of longitudinal accelerations at the spacecraft structure are not required. Product Description popup.authors popup.nrat_date 2020-04-02 Close