This example uses a water sprinkler mechanism to illustrate the AEM's support for simulating torques and torsional springs with complex geometry. A torque is used to simulate the forces that arise when water is forced through the two opposing pipes, resulting in their rotation.

Each pipe comes into contact with a rocking arm and the pipe's rotation is resisted with a torsional spring. After a pipe clears the rocking arm, the tension in the torsional spring returns the rocking arm to its resting state. The effect of changing the torsion and torque can be rapidly investigated.

Each pipe consists of three different sections of toroidal tubing. The AEM is automatically adding and deleting sophisticated 3D contact constraints between the toroidal pipe surfaces and a parametric curve and swept parametric surface on the rocking arm.