potato什么意思基于射线法的空间碎片撞击航天器生存力评估
Abstract
英文自我介绍范文Space debris pos a rious threat to the on-orbit mission of spacecraft. Many countries have included the impact of space debris as a key rearch issue during the space mission planning pha. At prent, the protection design is the main means to improve the survivability of spacecraft toward space crushing. The asssment of spacecraft's survivability under space debris environment is an important basic work for protection designing. In the current risk asssment software, the spacecraft surface is divided into finite elements when calculating the space debris impact probability and the nsitivity calculation is performed on each face elements. The spacecraft has a complex structure and numerous surfaces. This method has the disadvantage of inefficiency. This approach also brings problems when combined with vulnerability algorithms: When analyzing the internal components of a spacecraft, it is difficult to obtain the specific parameters of the space debris that hit the internal components. Therefore, when calculating the breakdown a
nd failure of the internal components, only a limited number of failure criteria can be applied.
Aiming at the two problems, this paper propos a spacecraft survivability asssment to space debris risk bad on ray method. In this paper, The article introduced the overall plan for the asssment method of survivability, and the key factors and modeling methods that affect the spacecraft's survivability under space debris environment are given. The specific scheme of the spacecraft nsitivity analysis method bad on the virtual exterior wall method and the spacecraft vulnerability analysis method compatible with multiple failure criteria are described. The key problems involved in the two are explained and the solutions are given. The vulnerability analysis was performed on three typical components, which proved that the algorithm can be compatible with multiple failure criteria.
In order to solve the initial ray generation problem in the nsitivity algorithm, this paper propos the virtual exterior wall method. The concrete implementation steps of the virtua
l exterior wall method are given. The correctness of the virtual exterior wall method and the nsitivity algorithm is verified through the simulation of the protection manual's standard working conditions. The conclusion that the nsitivity algorithm is more efficient than the S3DE classical algorithm is obtained. Through the nsitivity simulation of the simplified space station, the influence of the characteristic parameters of the virtual exterior wall method on the nsitivity simulation effect is discusd.
In order to simulate the trajectory and behavior of hypervelocity impact debris cloud, a method of simulating fragment clouds with rays is propod in this paper, and the specific implementation steps of the method are given. This method is ud to
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填空simulate the debris cloud generated by debris impacting the Whipple structure. Simulation results and real objects The simulation results are consistent with the results of the physical experiment, which proves the correctness of the method..
The software development was carried out bad on the method of ray method space debris impact spacecraft survivability asssment. The developed software was ud as
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a survivability solution model of the survival asssment software S3DE, and the overall framework and operation interface of the software were introduced. The application software analyzes the survivability of the simulated satellite. The analysis results are consistent with the results of the S3DE classical algorithm, which proves the correctness of the survivability algorithm propod in this paper.
The rearch results of this paper provide a space debris impact spacecraft survival analysis program that is efficient and supports a variety of failure criteria, and gives solutions to its key problems. The rearch has certain engineering application value.
Keywords: Space debris, Spacecraft survivability, Ray method, Virtual exterior wall method, Damage criterion
摘要 ............................................................................................................................... I Abstract ........................................................................................................................... I I 第1章绪论 . (1)
1.1课题的研究背景及意义 (1)
1.2国内外研究进展 (2)
1.2.1国外研究进展 (2)
1.2.2国内研究进展 (5)
1.2.3国内外研究进展分析 (7)
宾语从句的语序
1.3本文主要研究内容 (8)中九
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第2章基于射线法的航天器生存力评估方案 (10)
应用英语专业
2.1 引言 (10)非凡的什么
2.2 航天器生存力评估总体方案 (10)
