The waves of military innovation have changed the principle and concept of traditional military warfare. The command of the space, succeeding the power of the land in the early days, the Sea superiority in the 18th century, the command of land in the 19th century, the Air superiority and the Information dominance in the 20th century has become a totally new concept of military command. The space warfare, for the purpose of controlling the space, finally comes on the stage. Under the influence of the competitors between the U.S.A. and U.S.S.R. in the field of military prowess, China started its development of space technology in 1956. After 50 years passed, Chain has become a nation of potential space warfare. Its prowess in space warfare is found on its advanced and firmly established space science and technology. Following the U.S.A. and the U.S.S.R. China has build up its space army which aims at seizing the dominion of the future space warfare. Evidently, every great nation, for the purposes of gaining supreme authority in the warfare in this century, has fully engaged in building up its prowess in the command of the space. This essay aims at study China¡¦s development in space warfare which is founded on the concept of the scramble for the command of the space. Such studies help to understand China¡¦s recognition of space warfare, its development of space army, its research and development in space science and technology, its present structure and equipment for space warfare and its ambitions and directions in the future space warfare . The study of this essay, which are based on several perspectives, will help to provide a referential background for the observation of the future development of space warfare of China.

La terminologie des sciences et techniques spatiales (STS) relevée sur corpus est étudiée dans le cadre et avec la structuration ontologique du domaine. La formation morphosyntaxique, le caractère de l’unité terminologique ainsi que le schéma d’arguments (expressions prédicatives et arguments) sont analysés tant en contexte qu’indépendamment du contexte. L’unité terminologique se caractérise par un degré de figement relatif : une des propriétés de l’unité terminologique « longue » est que celle-ci peut souvent être décomposée, elle peut avoir un comportement discursif, notamment la reprise anaphorique et la réduction par suppression de l’un de ses composants. Dans ce dernier cas, il s’agit de certains aspects de la terminologisation tels que la chute d’une information non différentielle et le maintien d’un élément nominal ou caractérisant. Ainsi, plusieurs aspects sont des facteurs constants qui peuvent permettre de mettre en évidence l’évolution diachronique de l’unité terminologique. L’apport de la structuration ontologique est analysé dans le but de décrire non seulement les concepts des STS mais aussi l’emploi du schéma d’arguments (verbal et nominal) dans le corpus en se fondant sur des étiquettes sémantico-syntaxiques. Une analyse du verbe spécialisé a été développée pour fournir des informations utiles à la constitution des bases de données terminologiques multilingues ou encore la rédaction des définitions technoscientifiques. L’étude a permis également de décrire des verbes absents dans les dictionnaires de spécialité, de montrer comment un verbe peut acquérir un nouveau sens spécialisé et d’identifier l’agent typique de ces verbes. Deux classifications du verbe spécialisé selon ses emplois et sa structure morphosyntaxique ont été proposées : unité verbale simple (UVS) et unité verbale complexe (UVC). Un syntagme implique l’une des deux analyses : unité compositionnelle ou unité non-compositionnelle. Selon la situation contextuelle, la définition du verbe en langue de spécialité a permis enfin de distinguer les trois acceptions du verbe : verbe très spécialisé, verbe polysémique et verbe support. / The terminology related to the space science and technology (SST), corpus-based approach, is studied within the framework of the ontological structure pattern. The morpho-syntactical formation of the terminological unit, its characteristics as well as the schemata of arguments (predicative expressions and arguments) are both analyzed within the context and beyond the context. It’s characterized by a level of relative fixed structure: one of the properties of the “long” terminological unit that can often be decomposed. It can have a discursive behavior in particular, discourse anaphora, and the reduction by deletion of one of its components. In the latter case, this refers to certain aspects of the terminologization such as non-differential element falling and a characteristic or nominal element maintaining. Therefore, some aspects are constant factors which allow to highlight the diachronic evolution of the terminological unit. The outcome of the ontological structure is analyzed with the aim of describing not only the concepts of the SST, but also the use of the schemata of arguments i.e. verbal and nominal in the corpus by establishing itself on the semantic-syntactical labels. An analysis of the specialized verb was developed to supply useful information for the constitution of the multilingual terminological database or to give techno-scientific definitions. The study also allowed to describe absent verbs in the specialized dictionaries, to show how a verb can acquire a new specialized meaning, to identify the typical agent of the specialized verbs. There are two classifications of the specialized verb according to their uses and their morpho-syntactical structure were proposed as; simple verbal unit (SVU) and complex verbal unit (CVU). A syntagm involves one of the two analyzes: compositional unit or non-compositional unit. According to the situational context, the definition of the verb in LSP allowed finally to identify three meanings of the verb: very specialized verb, polysemous verb, and support verb.

The particular study case in this thesis is the shock test performed on the LISA Pathfinder satellite conducted in a laboratory environment on a dedicated test bed: Vega Shock Test Apparatus (VESTA). This test is considered fully representative to study shock levels produced by fairing jettisoning event at Vega Launcher Vehicle, which induces high shock loads towards the satellite. In the frame of this thesis, some transient response analyses have been conducted in MSC Nastran, and a shock simulation tool for the VESTA test configuration has been developed. The simulation tool is based on Nastran Direct Transient Response Analysis solver (SOL 109), and is representative of the upper composite of Vega with the LISA Pathfinder coupled to it. Post-processing routines of transient response signals were conducted in Dynaworks which served to calculate Shock Response Spectra (SRS). The simulation tool is a model of forcing function parameters for transient analysis which adequately correlates with the shock real test data, in order to understand how the effect of shock generated by the launcher is seen in the satellite and its sub-systems. Since available computation resources are limited the parameters for analysis were optimised for computation time, file size, memory capacity,  and model complexity. The forcing function represents a release of the HSS clamp band which is responsible for fairing jettisoning, thus the parameters which were studied are mostly concerning the modelling of this event. Among many investigated, those which visibly improved SRS correlation are radial forcing function shape, implementation of axial impulse, clamp band loading geometry and refined loading scheme. Integration time step duration and analysis duration were also studied and found to improve correlation.  From each analysis, the qualifying shock environment was then derived by linear scaling in proportion of the applied preload, and considering a qualification margin of 3dB. Consecutive tracking of structural responses along shock propagation path exposed gradual changes in responses pattern and revealed an important property that a breathing mode (n = 0) at the base of a conical Adapter translates into an axial input to the spacecraft. The parametrisation itself was based on responses registered at interfaces located in near-field (where the clamp band is located and forcing function is applied) and medium-field with respect to the shock event location. Following shock propagation path, the final step was the analysis of shock responses inside the satellite located in a far-field region, which still revealed a very good correlation of results. Thus, it can be said that parametrisation process was adequate, and the developed shock simulation tool can be qualified. However, due to the nature of shock, the tool cannot fully replace VESTA laboratory test, but can support shock assessment process and preparation to such test. In the last part of the thesis, the implementation of some finite element model improvements is investigated. Majority of the panels in spacecraft interior exhibited shock over-prediction due to finite element model limitation. Equipment units modelled as lump masses rigidly attached with RBE2 elements to the panel surface are a source of such local over-predictions. Thus, some of the units were remodelled and transient responses were reinvestigated. It was found that remodelling with either solid elements, or lump mass connected to RBE3 element and reinforced by RBE2 element, can significantly improve local transient responses. This conclusion is in line with conclusions found in ECSS Shock Handbook.