【64】后处理各项结果的意义？ - 研发埠

A：MS_PRESSURE (Mean Square Pressure) -> [Pa²]
This indicator is computed in the cavity with the formula : (1/V)*integral((p*.p).dV). It is not an arithmetic mean value computed from a sample of local results but a mean value computed from the nodes.

S_PRESSURE (Square Pressure) -> [Pa².m³]
This indicator is related to the previous one :
S_PRESSURE = MS_PRESSURE * VOL       with VOL : Cavity Volume [m³]

MS_VELOCITY (Mean Square Velocity) -> [m².s-²]
This indicator is based on the structure and computed with the following formula: (1/S)*integral((v*.v).dS).

S_VELOCITY (Square Velocity) -> [m^4.s-²]
This indicator is related to the previous one:
S_VELOCITY = MS_VELOCITY * SURF          with SURF: Structure surface [m²]

MSN_VELOCITY (Mean Square Normal Velocity) -> [m².s-²]
Unlike the MS_VELOCITY, the normal velocity (orthogonal) along the structure faces is taken into account.

SN_VELOCITY (Square Normal Velocity) -> [m^4.s-²]
In the same way, this indicator is directly related to the MSN_VELOCITY:
SN_VELOCITY = MSN_VELOCITY * SURF          with SURF: Structure surface [m²]

====== MODAL Response

Two pop-up menu are available for the Cavity (STRUCTURE_DOMAIN, UPDATED_STRUCTURE) and the Structure (CAVITY_DOMAIN, UPDATED_CAVITY), respectively.

Inside the CAVITY_DOMAIN, the indicator MS_PRESSURE is available. Keep in mind that this result is an average over the field points attached to an acoustic domain.
Conversely, the S_PRESSURE indicator available inside the UPDATED_CAVITY pop-up menu is a mean value from all the cavity nodes (integral).

Similarly, inside the STRUCTURE_DOMAIN, the indicator MSN_VELOCITY  is also an average over the field points attached to a structure domain.