huangyhg

can someone direct me to a free dow
can someone direct me to a free download source, software or text information on how to calculate the natural frequency, vibration modes in thin walled pipes and shells (flexural vibration in the plane of the ring). i know of the book by r.d.blevins, but have not wish to buy it, yet.

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借用达朗贝尔的名言：前进吧，你会得到信心!
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