Spring-Mass Chain — Normal Modes

Masses N: 12 Spring constant k: 10 Mass m: 1.0 Damping γ: 0.01

Mode 1 Mode 2 Mode 3 Mode 4 Random Pluck

Drive frequency: 0 (off) Drive mass #: 6

Normal modes: ω_n = 2√(k/m) sin(nπ/2(N+1))
Click on any mass to displace it.
All modes visible in spectrum below.