DYNAMIC MODEL OF PROCESS OF SEPARATION THE LARGE-SIZED ELASTIC SPACE-ROCKET DESIGNS

The approach to working out of dynamic model of one of key stages of flight of space-rocket systems – process of separation of large-sized designs is offered. The urgency of the account of own elastic properties of the separated objects, caused by growth of their sizes at simultaneous minimisation of weight of a “dry” design, by application of new materials with good strength and the expressed elastic properties, considerable on size (to hundreds kilonewtons) the concentrated forces created by special means of branch is proved. On the basis of assumptions, characteristic for investigated process (a little angular speeds in the course of relative movement at separation in comparison with the lowest frequencies of divided objects). Transition from the differential equations of elastic fluctuations in private derivatives to system of the ordinary differential equations describing excitation of the limited set of the lowest forms that has allowed to formulate the effective approach supposing evident mechanical interpretation is carried out: full movement at separation is displayed on portable movement (rotary and forward as whole) and the small elastic relative fluctuations described in the universal modal formulation. Process of separation of the aerospace plane and the carrier rocket is analysed. The effect of “loss” of relative speed of branch because of elastic fluctuations is revealed, the recommendation about a rational choice of installation sites of means of branch is formulated.