Obtaining method of ballistic limit equation of space debris protection structure under cylindrical projectile impact

Abstract

The invention discloses a method for obtaining a ballistic limit equation of a space debris protection structure under the impact of a cylindrical projectile, which includes equivalent principle transformation, simulation calculation, determination of velocity segmentation points, definition of shape coefficients, shape coefficient equation fitting, and obtaining cylindrical projectiles Ballistic limit equations and other steps, the ballistic limit equations that can characterize the impact effect of cylindrical projectiles with different length-to-diameter ratios are obtained by bringing the shape coefficient equations into the equations of the simulation calculation. The ballistic limit equation of the cylindrical projectile obtained by the invention only needs a small amount of tests for calibration and correction, which can provide a reference for engineering design and has obvious practical value.

Description

technical field [0001] The invention belongs to the technical field of space debris protection, and in particular relates to a method for obtaining a ballistic limit equation of a space debris protection structure under the impact of a cylindrical projectile. Background technique [0002] In the practical application of space debris protection structures, impact risk assessment should be carried out first to determine whether the protection structure meets the protection requirements. It is necessary to ensure safety and avoid "over-design", which increases the unnecessary mass and cost of the spacecraft. Ballistic limit is an important form of evaluating protective structure schemes at present. It is used to describe the critical failure state of protective structures under the impact of space debris. The usual definitions include the diameter and impact velocity of the projectile, the thickness of the plate, the protective distance, and the bulkhead. The relationship betwe...

AI Technical Summary

Problems solved by technology

A large number of studies have shown that under the same impact conditions, non-spherical projectiles have stronger damage ability than spherical projectiles of the same mass, which leads to the fact that the ballistic limit equation applied in the current space debris risk assessment does not consider the influence of projectile shape effects, and cannot Accurately predict and evaluate the ultra-high-speed impact damage characteristics of the protective structure, so that there are unknown risks in the design of the protective structure of the spacecraft

At the same time, limited by the launch capability of the traditional light gas cannon system, it is difficult for the launch speed of spherical projectiles to reach more than 8km / s

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