original_docstring: Specifies the missing mass response calculation.
  
          APDL Command: MMASS
  
          Parameters
          ----------
          option
              Flag to activate or deactivate missing mass response calculation.
  
              0 (OFF or NO) - Deactivate (default).
  
              1 (ON or YES) - Activate.
  
          zpa
              Zero Period Acceleration Value. If a scale factor FACT is defined
              on the SVTYP command, it is applied to this value.
  
          Notes
          -----
          The missing mass calculation is valid only for single point excitation
          response spectrum analysis (SPOPT, SPRS) and for multiple point
          response spectrum analysis (SPOPT, MPRS) performed with base excitation
          using acceleration response spectrum loading. Missing mass is supported
          in a spectrum analysis only when the preceding modal analysis is
          performed with the Block Lanczos, PCG Lanczos, Supernode, or Subspace
          eigensolver (Method =LANB, LANPCG, SNODE, or SUBSP on the MODOPT
          command).
  
          The velocity solution is not available (Label = VELO on the combination
          command: SRSS, CQC...) when the missing mass calculation is activated.
  
          The missing mass calculation is not supported when the spectrum
          analysis is based on a linear perturbation modal analysis performed
          after a nonlinear base analysis.
  
          The missing mass is not supported when superelements are present.
  
          To take into account the contribution of the truncated modes, the
          residual vector (RESVEC) can be used in place of the missing mass
          response. This is of particular interest if the velocity solution is
          requested or if a nonlinear prestress is included in the analysis
          (linear perturbation), or if a superelement is present, since the
          missing mass cannot be used in these cases.
  
          In a multiple point response spectrum analysis (SPOPT,MPRS), the MMASS
          command must precede the participation factor calculation command
          (PFACT).
  
          This command is also valid in PREP7.
          
docstring: Specifies the missing mass response calculation.
  APDL Command: MMASS
  
  Parameters
  
  option
  Flag to activate or deactivate missing mass response calculation.
  
  0 (OFF or NO) - Deactivate (default).
  
  1 (ON or YES) - Activate.
  
  zpa
  Zero Period Acceleration Value. If a scale factor FACT is defined
  on the SVTYP command, it is applied to this value.
  
  Notes
  
  The missing mass calculation is valid only for single point excitation
  response spectrum analysis (SPOPT, SPRS) and for multiple point
  response spectrum analysis (SPOPT, MPRS) performed with base excitation
  using acceleration response spectrum loading. Missing mass is supported
  in a spectrum analysis only when the preceding modal analysis is
  performed with the Block Lanczos, PCG Lanczos, Supernode, or Subspace
  eigensolver (Method =LANB, LANPCG, SNODE, or SUBSP on the MODOPT
  command).
  
  The velocity solution is not available (Label = VELO on the combination
  command: SRSS, CQC...) when the missing mass calculation is activated.
  
  The missing mass calculation is not supported when the spectrum
  analysis is based on a linear perturbation modal analysis performed
  after a nonlinear base analysis.
  
  The missing mass is not supported when superelements are present.
  
  To take into account the contribution of the truncated modes, the
  residual vector (RESVEC) can be used in place of the missing mass
  response. This is of particular interest if the velocity solution is
  requested or if a nonlinear prestress is included in the analysis
  (linear perturbation), or if a superelement is present, since the
  missing mass cannot be used in these cases.
  
  In a multiple point response spectrum analysis (SPOPT,MPRS), the MMASS
  command must precede the participation factor calculation command
  (PFACT).
  
  This command is also valid in PREP7.
docstring_tokens: Specifies the missing mass response calculation . APDL Command : MMASS Parameters option Flag to activate or deactivate missing mass response calculation . 0 ( OFF or NO ) - Deactivate ( default ) . 1 ( ON or YES ) - Activate . zpa Zero Period Acceleration Value . If a scale factor FACT is defined on the SVTYP command it is applied to this value . Notes The missing mass calculation is valid only for single point excitation response spectrum analysis ( SPOPT SPRS ) and for multiple point response spectrum analysis ( SPOPT MPRS ) performed with base excitation using acceleration response spectrum loading . Missing mass is supported in a spectrum analysis only when the preceding modal analysis is performed with the Block Lanczos PCG Lanczos Supernode or Subspace eigensolver ( Method = LANB LANPCG SNODE or SUBSP on the MODOPT command ) . The velocity solution is not available ( Label = VELO on the combination command : SRSS CQC ... ) when the missing mass calculation is activated . The missing mass calculation is not supported when the spectrum analysis is based on a linear perturbation modal analysis performed after a nonlinear base analysis . The missing mass is not supported when superelements are present . To take into account the contribution of the truncated modes the residual vector ( RESVEC ) can be used in place of the missing mass response . This is of particular interest if the velocity solution is requested or if a nonlinear prestress is included in the analysis ( linear perturbation ) or if a superelement is present since the missing mass cannot be used in these cases . In a multiple point response spectrum analysis ( SPOPT MPRS ) the MMASS command must precede the participation factor calculation command ( PFACT ) . This command is also valid in PREP7 .
code: def mmass(self, option="", zpa="", **kwargs):
          """Specifies the missing mass response calculation.
  
          APDL Command: MMASS
  
          Parameters
          ----------
          option
              Flag to activate or deactivate missing mass response calculation.
  
              0 (OFF or NO) - Deactivate (default).
  
              1 (ON or YES) - Activate.
  
          zpa
              Zero Period Acceleration Value. If a scale factor FACT is defined
              on the SVTYP command, it is applied to this value.
  
          Notes
          -----
          The missing mass calculation is valid only for single point excitation
          response spectrum analysis (SPOPT, SPRS) and for multiple point
          response spectrum analysis (SPOPT, MPRS) performed with base excitation
          using acceleration response spectrum loading. Missing mass is supported
          in a spectrum analysis only when the preceding modal analysis is
          performed with the Block Lanczos, PCG Lanczos, Supernode, or Subspace
          eigensolver (Method =LANB, LANPCG, SNODE, or SUBSP on the MODOPT
          command).
  
          The velocity solution is not available (Label = VELO on the combination
          command: SRSS, CQC...) when the missing mass calculation is activated.
  
          The missing mass calculation is not supported when the spectrum
          analysis is based on a linear perturbation modal analysis performed
          after a nonlinear base analysis.
  
          The missing mass is not supported when superelements are present.
  
          To take into account the contribution of the truncated modes, the
          residual vector (RESVEC) can be used in place of the missing mass
          response. This is of particular interest if the velocity solution is
          requested or if a nonlinear prestress is included in the analysis
          (linear perturbation), or if a superelement is present, since the
          missing mass cannot be used in these cases.
  
          In a multiple point response spectrum analysis (SPOPT,MPRS), the MMASS
          command must precede the participation factor calculation command
          (PFACT).
  
          This command is also valid in PREP7.
          """
          command = f"MMASS,{option},{zpa}"
          return self.run(command, **kwargs)
code_tokens: def mmass ( self , option = "" , zpa = "" , ** kwargs ) : command = f"MMASS,{option},{zpa}" return self . run ( command , ** kwargs )
short_docstring: Specifies the missing mass response calculation.
short_docstring_tokens: Specifies the missing mass response calculation .
comment: """Specifies the missing mass response calculation.
  
          APDL Command: MMASS
  
          Parameters
          ----------
          option
              Flag to activate or deactivate missing mass response calculation.
  
              0 (OFF or NO) - Deactivate (default).
  
              1 (ON or YES) - Activate.
  
          zpa
              Zero Period Acceleration Value. If a scale factor FACT is defined
              on the SVTYP command, it is applied to this value.
  
          Notes
          -----
          The missing mass calculation is valid only for single point excitation
          response spectrum analysis (SPOPT, SPRS) and for multiple point
          response spectrum analysis (SPOPT, MPRS) performed with base excitation
          using acceleration response spectrum loading. Missing mass is supported
          in a spectrum analysis only when the preceding modal analysis is
          performed with the Block Lanczos, PCG Lanczos, Supernode, or Subspace
          eigensolver (Method =LANB, LANPCG, SNODE, or SUBSP on the MODOPT
          command).
  
          The velocity solution is not available (Label = VELO on the combination
          command: SRSS, CQC...) when the missing mass calculation is activated.
  
          The missing mass calculation is not supported when the spectrum
          analysis is based on a linear perturbation modal analysis performed
          after a nonlinear base analysis.
  
          The missing mass is not supported when superelements are present.
  
          To take into account the contribution of the truncated modes, the
          residual vector (RESVEC) can be used in place of the missing mass
          response. This is of particular interest if the velocity solution is
          requested or if a nonlinear prestress is included in the analysis
          (linear perturbation), or if a superelement is present, since the
          missing mass cannot be used in these cases.
  
          In a multiple point response spectrum analysis (SPOPT,MPRS), the MMASS
          command must precede the participation factor calculation command
          (PFACT).
  
          This command is also valid in PREP7.
          """