Predicting Loads Affecting Load-Bearing Elements of Cargo-Landing Means While Parachute System Bringing into Action

Аuthors

Averyanov I. O.

Moscow design industrial complex "MKPK "Universal", 79A, Altufevskoe shosse, Moscow, 127410, Russia

e-mail: i.averyanov@mail.ru

Abstract

Heavy cargoes parachute landing is being accomplished as a rule by the cascade multi-canopy parachute systems application (CMPS). Cargo landing systems (CLS) are intended for the safety ensuring of the landing process at all of its stages, i.e. from the cargo exiting from the aircraft fuselage to its straightforwardly landing on the site. The process of the parachute system (PS) bringing into action is the most dangerous from the viewpoint of the PS and CLS structural elements loading. The presented article deals with the problem of the CLS design loads determining in the process of the PS binging into action and forming corresponding computational case of loading. The PS in it was being presented as a one canopy of the main parachute connected with pilot chute by the sling. The presented work extends the MM [1-2] application area with regard to the CMPS functioning considering at the stage of its bringing into action for the CLS loading problem solving at the specified operating mode. For this purpose the following changes are introduced into the MM:
1 – a movable site, imitating the aircraft cargo floor, was realized to simulate the process of the cargo exiting from the aircraft fuselage;
2 – operation of the PS and CLS constituent parts was realized for adequacy ensuring of cargo exiting dynamic process;
3 – the cascade principle for the multiple canopy PS is realized.
To confirm the proposed method workability, a problem of loadings on the suspending system structural elements, namely wire-rope system, which is a part of the PS and intended for the cargo strapping to the CLS is being considered. For this purpose, a process of the PS with CMPS landing is being considered. The MM parameters identification is being performed at the first stage by the computational and experimental data comparing. The performed analysis revealed their good agreement in the process of the PS bringing into action, including the one with regard to the suspending system loading. A technique for the computational loading case, corresponding to the mode being considered for the suspending system elements structure is being presented at the second stage. By the results of the conducted study an inference may be drawn on the fidelity of computational characteristics being obtained by the developed method, which do not contradict with the experimental data, and may be employed for the computational cases of the CLS loading at the stage of the PS bringing into action.

Keywords:

cargo-landing system, cascade multiple canopy parachute system, landing process

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