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发表于 2009-6-16 11:58:49
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来自 江苏无锡
Robert_Su,
AS-9 Abaqus 以連接單元操作轨道运动问题的模拟 --- Robert_Su
http://forum.simwe.com/thread-862745-1-1.html
这贴进不了十强的，理由是缺乏科学性和有效性。
参考如下链接和信息：
http://demonstrations.wolfram.com/FlyingToTheMoon/
If one follows the suggestion of Francis Godwin in 1638 and harnesses some swans to a chair and directs them toward the Moon, one might or might not reach it. If the swans always travel toward the current position of the Moon, at constant speed, then the swans will fail to reach it unless their speed is at least as great as that of the Moon. In this Demonstration, the basic unit is 1 lunar distance and the swans start at the surface of the Earth, whose radius is 0.0167. The Moon is assumed to travel in a circle, with an orbital period (with respect to the fixed stars, not the Sun) of 27.3 days. In the event of failure, the swans continue to orbit around the dashed red path.
需要数据或其他信息可以问我，我会帮你的。 |
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发表于 2009-6-16 12:51:59
