- #1

- 1

- 0

I have a question about the undamped natural frequencies for a three degree of freedom system.

The equation of motion for the undamped system is :

M[tex]\ddot{x}[/tex]+K[tex]\dot{x}[/tex]=0

The undamped natural frequencies I found is a complex number : [tex]\omega[/tex]

^{2}=-187.29

Is this kind of result is possible? I'm surprised by the result I found since every time I've done a similar exercise before, the frequencies were always real numbers.

Thanks for your advices!