The development of space technology in the world today may fall into three categories: the design, manufacture and applications of spacecraft, manned space flight and space exploration. In the course of advancing spac...The development of space technology in the world today may fall into three categories: the design, manufacture and applications of spacecraft, manned space flight and space exploration. In the course of advancing space technology, many new mechanical problems arise continuously from the three and then lead to the emergence of a lot of new disciplinary branches, such as orbiting mechanics, atmospheric flight mechanics, structural dynamics, micro-gravity science, hypersonic aerodynamics, aerothermodynamics, engine gas dynamics and rarefied gas dy-’ namics. The successful and workable methods in the rise of these branches grow into the mainstream of space technology. For meeting the preset targets such as the design requirements of space vehicles, their development must rely on the effective use of three experimental tools: ground-based tests, computational simulation and flight tests. A methodological integration of the three tools, with comprehensive analysis of the data acquired from them, should be展开更多
Space environment refers to the medium- and high-altitude atmospheric layers higher than 20-30 kilometers above the Earth’s surface, including the ionosphere, magnetosphere and inter-planetary space. It is currently ...Space environment refers to the medium- and high-altitude atmospheric layers higher than 20-30 kilometers above the Earth’s surface, including the ionosphere, magnetosphere and inter-planetary space. It is currently being affected by both solar activity and human interference. Without an agreeable space environment, man cannot survive and sustain his booming development in today’s world. It is our solenm obligation to understand it, make use of it and preserve it intact.展开更多
文摘The development of space technology in the world today may fall into three categories: the design, manufacture and applications of spacecraft, manned space flight and space exploration. In the course of advancing space technology, many new mechanical problems arise continuously from the three and then lead to the emergence of a lot of new disciplinary branches, such as orbiting mechanics, atmospheric flight mechanics, structural dynamics, micro-gravity science, hypersonic aerodynamics, aerothermodynamics, engine gas dynamics and rarefied gas dy-’ namics. The successful and workable methods in the rise of these branches grow into the mainstream of space technology. For meeting the preset targets such as the design requirements of space vehicles, their development must rely on the effective use of three experimental tools: ground-based tests, computational simulation and flight tests. A methodological integration of the three tools, with comprehensive analysis of the data acquired from them, should be
文摘Space environment refers to the medium- and high-altitude atmospheric layers higher than 20-30 kilometers above the Earth’s surface, including the ionosphere, magnetosphere and inter-planetary space. It is currently being affected by both solar activity and human interference. Without an agreeable space environment, man cannot survive and sustain his booming development in today’s world. It is our solenm obligation to understand it, make use of it and preserve it intact.
