作者jawf1413 (蓝月)
看板Grad-ProbAsk
标题[问题] 97中央机械动力
时间Fri Mar 20 17:39:23 2009
http://140.115.130.224:8080/~arhui/cexamn/exam/EN03_97_00.pdf
动力第三题
题目中这句 Viscous damping ensues, and the ratio of two successive
positive-displacement amplitudes is 4.
要怎麽用算式写??????
还有为什麽要这样写?????
麻烦善心人士帮我解惑一下吧 (．＿．?)
感激不尽...
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 61.229.128.206
1F：→ blazesunny:振幅衰减率为4倍 即δ=ln|4| 再由ζ=δ/√δ^2+4π^2得 02/03 01:57
2F：→ blazesunny:damping ratio 02/03 01:58