Looking for the spectrum of equilateral drums • Physics Forums

Heidi · 2024-01-28T09:38:02+00:00

Hi Pfs, I found the formulas for the frequencies of half square triangles, and rectangles. But nothing on hexagonal drums or equilateral triangles. (it would nice to get them with Dirichlet and Neumann bordery conditions) thanks

Thread 'Derivation of Hamilton's Principle: Questions'

I have recently been really interested in the derivation of Hamiltons Principle. On my research I found that with the term ##m \cdot \frac{d}{dt} (\frac{dr}{dt} \cdot \delta r) = 0## (1) one may derivate ##\delta \int (T - V) dt = 0## (2). The derivation itself I understood quiet good, but what I don't understand is where the equation (1) came from, because in my research it was just given and not derived from anywhere. Does anybody know where (1) comes from or why from it the...

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I Looking for the spectrum of equilateral drums

Thread 'Derivation of Hamilton's Principle: Questions'

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