Random response analysis of preloaded metal designs using the MSC Nastran software package. Part 1
Published: 23.06.2025
Authors: Shulga A.A., Alikin N.A., Barysheva D.V.
Published in issue: #6(162)/2025
Category: Aviation and Rocket-Space Engineering | Chapter: Strength and Thermal Conditions of Aircraft
The paper presents a methodology ofrandom response analysis of preloaded metal designs carried out in the MSC Nastran software package. It describes an analytical solution to this problem for the linear systems with distributed parameters using a preloaded pinned beam as an example. Comparison of the numerical solution using the finite element method against the analytical solution is provided. The compared values are the natural vibration frequencies in the natural vibrations problem, and in the problem of random vibrations, they include displacement, stress, and fatigue damage in the structure central point. Results of computing the fatigue damage according to the presented methodology are meeting the requirements in solving the dynamic strength engineering problems, since they are of sufficiently high accuracy. Thus, relative deviation in the compared values is no more than 1%.
EDN IFMLUF
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