Least square method for designing static test load of plane symmetric reentry vehicle structure

Abstract

The invention discloses a least square method for designing a static test load of a plane symmetric reentry vehicle structure. The least square method comprises the following four steps of: step 1, calculating aerodynamic force, inertia force and resultant force thereof in a segmented six-component form according to an input station aerodynamic load in a six-component form and mass distribution ina station mass form; step 2, giving a least square solution of the magnitude of a segmented equivalent load and an equivalent action position according to the segmented six-component form resultant force; step 3, according to the size and the equivalent action position of the segmented equivalent load, giving a two-point picking solving method of the station equivalent load according to the leverdistribution principle, and acquiring the size and the equivalent action position of the station three-component form equivalent loading force a and step 4, solving a moment deviation of the loadingstation by utilizing the segmented equivalent load and the station equivalent load so as to carry out load evaluation. According to the invention, the high-precision rapid design of the static test load of the plane symmetric reentry vehicle structure is realized, and the static test load is convenient for static test designers to use.

Description

technical field [0001] The invention belongs to the field of static test of aircraft structure, and in particular relates to a least squares method for load design of plane symmetrical reentry aircraft structure static test. Background technique [0002] Facing the reentry stage of the symmetric reentry vehicle, it is unpowered and controlled flight, the range of the flight Mach number is larger than that of the aircraft, and the aerodynamic lift / drag ratio and maneuverability are between the aircraft and the missile. Its flight profile is significantly different from that of both aircraft and missiles. The static test of the whole aircraft structure facing the symmetrical reentry vehicle is a test to study the static strength and static stiffness of the aircraft structure under laboratory conditions, using the test device to reproduce the load and boundary conditions. Structural static test is an important means to verify the rationality of structural form and the correctn...

AI Technical Summary

Problems solved by technology

The aerodynamic force of the fuselage of a symmetrical re-entry vehicle can account for 1 / 3 to 1 / 2 of the entire vehicle, and the load equivalent method represented by "multi-point pick" can no longer meet the load accuracy requirements of the static test

At present, there is no public design method for high-precision static test loads of plane-symmetric reentry vehicles

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