25.10. Special Parametric Value (SPV)

MTT3D provides SPV for the user easily to access to important design parameters and modification. The list below introduces functionalities of SPV.

• SPV always exists and used internally.

• The existing common SPV is put in an input field of dialog box initially.

• If the user doesn’t check the SPV name button and enter a numeric value in the input field of dialog, the system refers the numeric value.

• The user can create a new standard PV for the input field and its current value is the entered numeric value.

• If the user checks the SPV name button and enters a numeric value in the input field of dialog, the entered numeric value becomes the current value of SPV.

Table 25.3 Special Parametric Value List

Group	** Contents**		Name	Default (Unit)
Sheet	Density		SH_D	7.0e-7 (kg/mm^3)
	Damping Ratio		SH_DR	1.0e-2
	Young’s Modulus		SH_E	2000(N/mm^2)
	Poisson’s Ratio		SH_P	0.2
	Young’s Modulus X		SH_EX	2000(N/mm^2)
	Young’s Modulus Z		SH_EZ	1333(N/mm^2)
	Shear Modulus XZ		SH_GXZ	833(N/mm^2)
	Poisson’s Ratio XZ		SH_PXZ	0.2
Fixed Roller	To Sheet Contact	Stiffness Coefficient	FRTS_K	1.2e-2 (N/mm)
		Exponent K	FRTS_K_EXP	1.0
		Damping Coefficient	FRTS_C	1.2e-6 (N*sec/mm)
		Boundary Penetration	FRTS_B_PEN	0.1 (mm)
		Indentation Exponent	FRTS_I_EXP	2.0
		Friction Coefficient	FRTS_MU	1.0
		Threshold Velocity	FRTS_T_VEL	10.0 (mm/sec)
		Overdrive Factor	FRTS_ODF	0.0
Movable Roller	To Sheet Contact	Stiffness Coefficient	MRTS_K	1.2e-2 (N/mm)
		Exponent K	MRTS_K_EXP	1.0
		Damping Coefficient	MRTS_C	1.2e-6 (N*sec/mm)
		Boundary Penetration	MRTS_B_PEN	0.1 (mm)
		Indentation Exponent	MRTS_I_EXP	2.0
		Friction Coefficient	MRTS_MU	1.0
		Threshold Velocity	MRTS_T_VEL	10.0 (mm/sec)
		Overdrive Factor	MRTS_ODF	0.0
	To Roller Contact	Stiffness Coefficient	MRTR_K	120.0 (N/mm)
		Exponent K	MRTR_K_EXP	1
		Damping Coefficient	MRTR_C	12.0 (N*sec/mm)
		Boundary Penetration	MRTR_B_PEN	0.1 (mm)
		Indentation Exponent	MRTR _I_EXP	2.0
		Friction Coefficient	MRTR_MU	1.0
		Threshold Velocity	MRTR_T_VEL	10.0 (mm/sec)
	Nip Spring	Stiffness Coefficient	NIP_TSD_K	1.0e-3 (N/mm)
		Damping Coefficient	NIP_TSD_C	1.0e-4 (N*sec/mm)
		Preload	NIP_TSD_F	5.e-3 (N)
Guides	To Sheet Contact	Stiffness Coefficient	GTS_K	1.2e-2 (N/mm)
		Exponent K	GTS_K_EXP	1
		Damping Coefficient	GTS_C	1.2e-6 (N*sec/mm)
		Boundary Penetration	GTS_B_PEN	0.1 (mm)
		Indentation Exponent	GTS_I_EXP	2.0
		Friction Coefficient	GTS_MU	0.0
		Threshold Velocity	GTS_T_VEL	10.0 (mm/sec)

25.10.1. Special Parametric Value Editor

Figure 25.81 Special Parametric Value List dialog box

Step to edit or export or import the Special Parametric Value

1. Click the MTT3D icon in the Toolkit tab.

2. Click the SPV icon of the Parameter group in the MTT3D tab.

3. If the user edits the values, the system refers the modified values.

4. If the user exports the names and values of the special parametric values, the *.rpv file is created. The file can be used in the design parametric study with RecurDyn Batch Simulation.

5. If the user imports the pre-defined *.rpv file, the system refers the imported values. In this case, the names of Special Parametric Value should be same.