VESTNIK of Samara University. Aerospace and Mechanical EngineeringVESTNIK of Samara University. Aerospace and Mechanical Engineering2542-04532541-7533Samara National Research University839010.18287/2541-7533-2020-19-4-80-86UnknownDetermination of loads on perforated tank partitionFilipovA. G.<p>Engineer;</p>
<p>Postgraduate Student</p>iskander-filipov@yandex.ruGlazkovI. E.<p>Engineer;</p>
<p>Postgraduate Student</p>reiser733@yandex.ruJoint Stock Company “Space Rocket Centre Progress”Samara National Research University3112202019480861602202116022021Copyright © 2021, VESTNIK of Samara University. Aerospace and Mechanical Engineering2021<p>The article presents a solution to the problem of dynamic loading of a perforated partition located in the fuel tank of a launch vehicle. A technique for calculating the dynamic loading of the partition is described. Its equation of motion was decomposed into components and the loads at harmonic oscillations of the launch vehicle were calculated. The acceleration of the attachment points and the acceleration of the oscillators simulating the oscillations of the fuel tank, obtained from the solution of the general dynamic problem for assessing the hydrodynamic force for the launch vehicle, were given as the initial data for the dynamic calculation of loads. At this stage, the load on the partition was calculated, taking into account the added mass of the liquid in the event of an emergency shutdown of the propulsion system, as one of the most heavily loaded for the system under discussion. Non-linear dynamic analysis was used to calculate the loads on the perforated partition. As a result of the calculation, forces were obtained in the attachment points of the element in question.</p>Переходный процессракета-носительдинамическая модельконечно-элементная модельперегрузкиамплитудно-частотная характеристикаквазистатикаTransient processlaunch vehicledynamic modelfinite element modeloverloadsfrequency responsequasi-static[Rabinovich B.I. On the equations of elastic vibrations of thin-walled rods with liquid filling in the presence of a free surface. Izvestiya AN SSSR. Otdelenie Tekhnicheskikh Nauk. 1959. No. 4. P. 63-68. (In Russ.)][Shmakov V.P. On the equations of axisymmetric vibrations of a cylindrical shell with liquid filling. Izvestiya AN SSSR. Mekhanika i Mashinostroenie. 1964. No. 1. P. 170-173. (In Russ.)][Moiseev N.N. On the theory of vibrations of elastic bodies with liquid cavities. Journal of Applied Mathematics and Mechanics. 1959. V. 23, Iss. 5. P. 1233-1254. DOI: 10.1016/0021-8928(59)90127-3][Aleksandrovich L.I., Lamper R.E. Sobstvennye kolebaniya uprugogo osesimmetrichnogo sosuda proizvol'nogo kontura. Trudy VI Vsesoyuznoy konferentsii po teorii obolochek i plastinok. Moscow: Nauka Publ., 1966. P. 25-27. (In Russ.)][Lamper R.E. K raschetu sobstvennykh kolebaniy bakov metodom Rittsa s var'iruemym parametrom. Trudy VII Vsesoyuznoy konferentsii po teorii obolochek i plastinok. Moscow: Nauka Publ., 1970. P. 351-354. (In Russ.)][Shimanskiy Yu.A. Dinamicheskiy raschet sudovykh konstruktsiy [Dynamic calculation of ship structures]. Leningrad: Sudpromgiz Publ., 1963. 444 p.][Rychkov S.P. Modelirovanie konstruktsiy v srede Femap with NX Nastran [Simulation of structures in Femapwith NX Nastran]. Мoscow: DМК Press Publ., 2013. 784 p.]