This probe and the available energy outputs for the supported analysis types are listed below.
Piezoelectric and thermal coupled Coupled Field Structural and Coupled Field Transient analyses support the following energy outputs:
| Kinetic: Kinetic energy due to the motion of parts in the analysis. |
| : Energy stored in bodies due to deformation. This value is computed from stress and strain results. It includes plastic strain energy as a result of material plasticity. |
| Damping: Represents the average elastic and electric losses. |
| : Total artificial energy of the selected body(s). The artificial energy is a sum of hourglass control energy and energy generated by in-plane drilling stiffness from shell elements (applies to all elements where meaningful). It also includes artificial energy due to contact stabilization. |
| : Total energy dissipation due to numerical stabilization in the selected body(s). |
| Total: This is the sum of all energies in the analysis. |
A Piezoelectric analysis (Coupled Field Harmonic) supports the following energy outputs:
| Kinetic: Kinetic energy due to the motion of parts in the analysis. |
| Potential: Sum of elastic strain energy and dielectric energy. |
| Damping: Represents the average elastic and electric losses. |
| : Total artificial energy of the selected body(s). The artificial energy is a sum of hourglass control energy and energy generated by in-plane drilling stiffness from shell elements (applies to all elements where meaningful). It also includes artificial energy due to contact stabilization. |
| : Total energy dissipation due to numerical stabilization in the selected body(s). |
| Total: This is the sum of all energies in the analysis. |
The Static Structural and Transient structural analyses supports the following energy outputs:
| : Kinetic energy due to the motion of parts in the analysis. |
| : Energy stored in bodies due to deformation. This value is computed from stress and strain results. It includes plastic strain energy as a result of material plasticity. |
| : Total damping energy of the selected body(s). |
| : Total artificial energy of the selected body(s). The artificial energy is a sum of hourglass control energy and energy generated by in-plane drilling stiffness from shell elements (applies to all elements where meaningful). It also includes artificial energy due to contact stabilization. |
| : Total energy dissipation due to numerical stabilization in the selected body(s). |
| Total: This is the sum of all energies in the analysis. |
A Rigid Dynamics analysis supports the following energy outputs:
| Kinetic: Kinetic energy due to the motion of parts in a transient analysis is calculated as ½ *mass* velocity2 for translations and ½ *omegaT*Inertia*omega for rotations. |
Potential: This energy is the sum of the potential energy due
to gravity and the elastic energy stored in springs and deformable bodies. The potential
energy due to gravity is proportional to the height of the body with respect to a
reference ground. The reference used in a Rigid Dynamics analysis is the origin of the
global coordinate system. Because of this, it is possible to have a negative potential
energy (and negative total energy) depending on your model coordinates. The elastic energy
includes energy due to deformation of spring(s) in a rigid body dynamic analysis and is
calculated as ½ * Stiffness * elongation2. The elastic
energy of the deformable bodies is calculated as  where K is the stiffness matrix and U is the elastic
displacement. |
| External: This is all the energy the loads and joints bring to a system. |
| Total: This is the sum of potential, kinetic and external energies in a Rigid Dynamics analysis. |
Note: Energy results are not available for Rigid Dynamics analysis on a body per-body basis. An energy probe scoped on a body will return the energy of the whole part to which body belongs.
Note: For stop, contact, and imperfect joints (radial gap, spherical gap and in-plane radial gap), the energy loss due to non-perfectly elastic collision (restitution factor<1) and/or friction is not taken into account in the external energy. Therefore, the total energy balance is not maintained and is expected to decrease.
An Explicit Dynamics analysis supports the following energy outputs:
- Internal:
This is the energy stored in bodies due to deformation. This includes both Plastic Work and Hourglass Energies.
- Kinetic:
Kinetic energy due to the motion of parts in the analysis.
- Plastic:
This energy is the plastic strain energy as a result of material plasticity.
- Hourglass:
The 2D and 3D Lagrangian volume and shell elements use hourglass control to remove zero energy modes of deformation. The forces of the hourglass control algorithms dissipate energy in resisting the zero energy modes of deformation.
For this analysis, this energy is calculated and accumulated in the element internal energy. The hourglass energy is also accumulated independently to the internal energy to allow users to interrogate and assess the relevance of hourglass energy in a simulation.
- Contact:
Contact energy is accumulated on a per body basis as:
For the purpose of energy accountancy, the contact energy is added to the work done on the system.
- Total:
This is the sum of internal and kinetic energies in the analysis.
