Here is another version of torsional wave (demostration)

Change the c[i] angle with slider and watch how wave propagate.
The slider for i can be used to change angle for i-th element.

The force acting on each element is
$F_i= K* c_i + K_ij * (c_{i+1}-c_i)+K_ij (c_i-c_{i-1})-b*\omega_i$
where $c_i$ is the i-th angle, $\omega_i$ is the angular velocity, $b$ is damping constant, $K_ij$ represent interaction between elements.

/htdocs/ntnujava/ejsuser/2/users/ntnu/fkh/torsionalwavedemo_pkg/torsionalwavedemo.propertiesFull screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list