Experimental Strength Analysis of Variable Stiffness Waffel-Grid Cylindrical Compartments. Part 1. Experimental Procedure
Journal Title: Проблеми машинобудування - Year 2019, Vol 22, Issue 1
Abstract
This paper proposes a method of the experimental study of the static stress-strain state (SSS) of the variable stiffness tail section of a launch vehicle (LV). The tail section consists of a body and a support ring. The body is a welded structure made up of two waffel-grid shells and two end frames. On the upper and lower end frames, there are bolt holes and guide pins for mating the frames to the fuel tank and support ring, respectively. The shells are made of AMg6NPP, and the frames, of AMg6M aluminum alloys, respectively. The tail section body is loaded through the four support brackets of the power ring, which is part of the test assembly. The article summarizes the results of the experimental analysis of the static SSS of an optimized tail section body under the conditions of loading close to realistic ones. As a result of the experimental research, we achieved the following goals: obtained data on the tail section body strength taking into account the design features, manufacturing technology, and mechanical characteristics of the material; tested theoretical methods for calculating structural strength; determined stresses in the places where they can most reliably be found only experimentally; identified structural sections that have enough strength to be subsequently decreased. Different-size static force factors were applied to the tail section. The static loading of the structure was performed in stages without dynamic components. When the tail section body was tested, measurements of the displacements and deformations were made. The deformations were measured for three different values of the shell longitudinal coordinate and at various points along the circumferential coordinate of the structure. At each point, two rosette strain gauges were glued. One strain gauge was glued in the longitudinal, and the other, in the circumferential direction. With the help of the proposed method, we investigated SSS of the tail section that was designed by the Yuzhnoye Design Bureau.
Authors and Affiliations
Maksim A. Degtyarev, Vitalii G. Danchenko, Artem V. Shapoval, Konstantin V. Avramov
Keywords
Related Articles
- EP ID EP622722
- DOI 10.15407/pmach2019.01.033
- Views 52
- Downloads 0
Study of the Stressed State Near the Crack That Initiates at the Inclusion Under Longitudinal Shift Wave Influence
Modern elements of building structures and machine parts often contain structural elements or technological defects that can be considered as thin inclusions of high rigidity. Reinforcing elements of composite materials...
Heat Transfer During Subcooled Boiling in Tubes (A Review)
This article provides a review of the correlations and models for determining the intensity of heat transfer during subcooled boiling in pipes. As a rule, correlations are based on dimensionless similarity numbers, while...
Calculation of Indicators of Reliability of Technical Systems by the Typical Structural Scheme Method
A method for calculating the indicators of structural reliability of systems with a large number of elements is presented. The method is based on the use of typical structural schemes, reflecting the concept of connectio...
Methodology to Solve Multi-Dimentional Sphere Packing Problems
This paper discusses the problem of optimally packing spheres of various dimensions into containers of arbitrary geometrical shapes. According to the international classification, this problem belongs to Sphere Packing P...
Peculiarities of Identifying a Power-generating Single-shaft GTE Mathematical Model
The processes of designing and developing gas turbine engines (GTE) are based on using mathematical models (MM), reflecting the physical picture of engine operation processes. One of the ways of improving the MM validity...