i have solved a torsional semi-definite system problem.(adsbygoogle = window.adsbygoogle || []).push({});

i have uploaded the solved problem.

solved for modal participation factor and effective mass.

for a semi definite system we know that one of the modes is rigid mode with natural frequency 0.

i think due to the presence of rigid mode i'm getting the modal participation factor vector as [5.3157 -3.76* 10^-3].

is this answer right? i mean how can there be no contribution from the flexible mode?

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# Modal participation factor & effective mass - semi definite system

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