Nonlinear dynamics — Rigid Free Flight

Nonlinear dynamicsPASS · 0%

Transient nonlinear dynamics, impact, and conservation-law verification. Checks: free-flight momentum energy and center-of-mass trajectory.

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Problem statement

Geometry: Unconstrained mixed-element assembly with prescribed initial translational and angular velocity; no loads or contact.
Material: Constitutive or analytical definition: Exact conservation laws for a free isolated body.
Boundary conditions: Required solver capability: mass_inertia_and_rigid_motion. Use the loading/path control stated in the setup and preserve the complete response history.
Measured quantity: Center of mass moves linearly; total linear momentum, angular momentum about the center of mass, kinetic energy, and all pairwise distances remain constant.

Paste these commands into the Terminal panel inside WebCAE. They use the same text DSL as the application; run one command per line:

units m
rigid_body mass=12.0 v0=1.5,-2.0,3.0 omega0=0.5,1.0,-0.2
solve transient method=symplectic dt=0.01 t_end=10.0
extract conservation_invariants

Reference value	P=46.8615 kg*m/s, E=93.3300 J
Our result	P=46.8615 kg*m/s, E=93.3300 J
Deviation	0%
Tolerance	5%
Status	PASS · 0%
Mesh details	Free flight 3D rigid body M=12 kg with coupled angular rotation

Updated: 2026-10-27 · version not recorded