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*INCIDENT WAVE INTERACTION
Define incident wave loading for a blast or scattering load on a surface.

This option is used to apply incident wave loading. The *INCIDENT WAVE INTERACTION PROPERTY option must be used in conjunction with the *INCIDENT WAVE INTERACTION option. If the incident wave field includes a reflection off a plane outside the boundaries of the mesh, this effect can be modeled with the *INCIDENT WAVE REFLECTION option. The incident wave interaction can be used in steady-state dynamic procedures to define individual wave sources or loading from diffuse sources.

Products: Abaqus/Standard  Abaqus/Explicit  Abaqus/CAE  

Type: History data

Level: Step

Abaqus/CAE: Interaction module

References:

Required parameter:

PROPERTY

Set this parameter equal to the name of the *INCIDENT WAVE INTERACTION PROPERTY option defining the incident wave field.

Required, mutually exclusive parameters: 

ACCELERATION AMPLITUDE

Set this parameter equal to the name of the amplitude curve defining the fluid particle acceleration time history at the standoff point (“Amplitude curves,” Section 34.1.2 of the Abaqus Analysis User's Guide). This amplitude curve will be used to compute the fluid traction only: a solid surface requiring a pressure load cannot be specified on the data line of an *INCIDENT WAVE INTERACTION option if the ACCELERATION AMPLITUDE parameter is used.

This parameter is valid only for transient planar incident waves using the *INCIDENT WAVE INTERACTION PROPERTY, TYPE=PLANE option. Reflected loads, using the *INCIDENT WAVE REFLECTION option, are not permitted in this case.

CONWEP

This parameter applies only to Abaqus/Explicit analyses.

Include this parameter to define an incident wave using the *CONWEP CHARGE PROPERTY option. This parameter is valid only for blast waves using the *INCIDENT WAVE INTERACTION PROPERTY, TYPE=AIR BLAST or TYPE=SURFACE BLAST option.

PRESSURE AMPLITUDE

Set this parameter equal to the name of the amplitude curve defining the fluid pressure time history at the standoff point (“Amplitude curves,” Section 34.1.2 of the Abaqus Analysis User's Guide). The corresponding fluid traction, if required, will be computed from the pressure amplitude reference.

UNDEX

Include this parameter to define a spherical incident wave using the *UNDEX CHARGE PROPERTY option. This parameter is valid only for spherical incident waves using the *INCIDENT WAVE INTERACTION PROPERTY, TYPE=SPHERE option.

Optional, mutually exclusive parameters for matrix generation and steady-state dynamics analysis (direct or subspace): 

IMAGINARY

Include this parameter to define the imaginary (out-of-phase) part of the loading at the standoff point.

REAL

Include this parameter (default) to define the real (in-phase) part of the loading at the standoff point.

Data line to define an incident wave when the CONWEP parameter is omitted: 

First (and only) line:

  1. Surface name.

  2. The node number or set name of the source node.

  3. The node number or set name of the standoff node.

  4. Reference magnitude.

Data line to define an incident wave when the CONWEP parameter is included: 

First (and only) line:

  1. Surface name.

  2. The node number or set name of the source node.

  3. Blank field.

  4. Time of detonation given in total time. See “Conventions,” Section 1.2.2 of the Abaqus Analysis User's Guide, for a discussion of the total time measure.

  5. Magnitude scale factor. The default is 1.0.