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MBSIM

ID

TYPE

TTYPE

TIME

STYPE

DELTA/
NSTEP/
PRINCR

ITYPE

DTOL

H0

HMAX

HMIN

VTOLFAC

MAXODR

DAEIDX

DCNTOL

DCRMXIT

DCRMNIT

DVCTRL

DJACEVL

DEVLEXP

DJACINI

DINTPRL

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MBSIM

ID

TYPE

TTYPE

TIME

STYPE

DELTA/
NSTEP/
PRINCR

ITYPE

DTOL

H0

HMAX

HMIN

VTOLFAC

MAXODR

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MBSIM

ID

TYPE

TTYPE

TIME

STYPE

DELTA/
NSTEP/
PRINCR

KETOL/
RESTOL

DQTOL/
FITOL

NITER

STBLT

COMPDEL

STTYPE

ID

Unique identification number.

(Integer > 0)

TYPE

Simulation type.

TRANS = Transient simulation type

STATIC = Static simulation type

No default

TTYPE

Termination type.

Options = (END or DUR) – See comment 2.

No default

TIME

Termination time or duration based on TTYPE.

(Real > 0.0) – See comment 2.

STYPE

Output step type.

DELTA = the next argument is expected to be a positive real value, and it is the output step time during the simulation run.

NSTEPS = the next argument is expected to be a positive integer value which will be the number of output steps during the simulation.

PRINCR = the next argument is expected to be a positive integer value which will be print increment. Solver will output at every intermediate print increment value.
If PRINCR is set to 1, the solver will output intermediate results at every integrator step.

See comment 2.

No default

DELTA

Output time step.

(Real > 0.0) – See comment 2.

NSTEPS

Maximum number of time steps.

(Integer > 0) – See comment 2.

ITYPE

Integrator type.

Options = (ABAM, VSTIFF, MSTIFF, or DSTIFF)

Default = DSTIFF

DTOL

Integrator tolerance.

Default = 0.001 (Real > 0.0)

H0

Initial time step for the integrator.

Default = 1e-8 (Real > 0.0)

HMAX

Max step size the integrator is allowed to take.

Default = 0.01 (Real > 0.0)

HMIN

Min step size the integrator is allowed to take.

Default = 1.0e-6 (Real > 0.0)

VTOLFAC

A factor that multiplies DTOL to yield the error tolerance for velocity states.

Default = 1000 (Real > 0.0)

MAXODR

The maximum order that the integrator is to take.

Default depends on ITYPE (Integer > 0)

DAEIDX

The index of the DAE formulation.

Default = 3 (Integer > 0)

DCNTOL

A tolerance on all algebraic constraint equations that the corrector must satisfy at convergence.

Default = 0.001 (Real > 0.0)

DCRMXIT

The maximum number of iterations that the corrector is allowed to take to achieve convergence.

Default = 4 (Integer > 0)

DCRMNIT

The minimum number of iterations that the corrector is allowed to take before it checks for corrector divergence.

Default = 1 (Integer > 0)

DVCTRL

A logical flag that controls whether the velocity states are checked for local integration error at each step.

(True or False,
Default = True, if DAEIDX is 3; otherwise False)

DJCEVL

An attribute to control the frequency of evaluation of the Jacobian matrix during corrector iterations.

Default is determined by MotionSolve (Integer > 0)

DEVLXP

The number of integration steps after which the evaluation pattern defined by DJCEVL is ignored, and the default evaluation pattern is to be used.

Default = 0 (Integer > 0)

DJACINI

Controls the Jacobian matrix evaluation during corrector iterations.

0: The integrator automatically determines when a new Jacobian is needed by examining the rate of convergence.

1: A new Jacobian is calculated at the first iteration.

2: A new Jacobian is calculated at the second iteration.

Default = 0

DINTRPL

Specifies whether the integrator uses interpolation for the results at the output steps.

TRUE: the solver forces the integrator to integrate the states from start_time to end_time as specified in the <Simulate> block. The results are then interpolated at the output points requested by the user.

FALSE: the solver does not place any restrictions on the integrator.

Default = TRUE

KETOL

Maximum residual kinetic energy tolerance.

Default = 1.0e-5 (Real > 0.0) – See comment 3.

RESTOL

Maximum residual tolerance for force imbalance method.

Default = 1.0e-4 (Real > 0.0) – See comment 4.

DQTOL

Maximum coordinate difference tolerance.

Default = 0.001 (Real > 0.0) – See comment 3.

FITOL

Maximum force imbalance tolerance.

Default = 0.001 (Real > 0.0) – See comment 4.

NITER

Max number of iterations for static solution to converge.

Default = 50 (Integer > 1) – See comment 3.

STBLT

Specifies the fraction of the mass matrix that is to be added to the Jacobian to ensure that it is not singular.

Default = 1e-10 (Real) – see comment 6.

COMPDEL

Delta value used during compliance matrix calculation.

Default = 0.001 (Real) – see comment 6.

STTYPE

Static solver type. See comment 5.

FIM = represents the Force Imbalance Method

MKM = represents the Maximum Kinetic Energy Attrition Method

Default = MKM