24.11. Special Parametric Value (SPV)

MTT2D provides SPVs to help for users easily access and modify important design parameters

The list below introduces the characteristics of SPVs.

• SPVs always exist and are used internally.

• Each existing common SPV is initially placed in an input field of a dialog box.

• If the user does not check SPV name and enter a numeric value in the input field of dialog, the system refers to the numeric value.

• The users 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 and enters a numeric value in the input field of dialog, the entered numeric value becomes the current value of SPV.

Table 24.3 Special Parametric Value List

Group	Contents		Name	Default (Unit)
Sheet	Thickness		SH_T	0.5(mm)
	Density		SH_D	2.2e-6 (kg/mm^3)
	Young’s Modulus		SH_E	2250(N/mm^2)
	Damping Factor		SH_C	32
	Sheet Curl Radius		SH_CR	0(mm)
Fixed Roller	To Sheet Contact	Stiffness Coefficient	FRTS_K	1.2 (N/mm)
		Exponent K	FRTS_K_EXP	1.3
		Damping Coefficient	FRTS_C	1.2e-2 (N*sec/mm)
		Boundary Penetration	FRTS_M_PEN	1 (mm)
		Indentation Exponent	FRTS_I_EXP	2
		Friction Coefficient	FRTS_MU	1.0
		Threshold Velocity	FRTS_T_VEL	10.0 (mm/sec)
Movable Roller	To Sheet Contact	Stiffness Coefficient	MRTS_K	1.2 (N/mm)
		Exponent K	MRTS_K_EXP	1.3
		Damping Coefficient	MRTS_C	1.2e-2 (N*sec/mm)
		Boundary Penetration	MRTS_M_PEN	1 (mm)
		Indentation Exponent	MRTS_I_EXP	2
		Friction Coefficient	MRTS_MU	1.0
		Threshold Velocity	MRTS_T_VEL	10.0 (mm/sec)
	To Roller Contact	Stiffness Coefficient	MRTR_K	1.2 (N/mm)
		Exponent K	MRTR_K_EXP	1.3
		Damping Coefficient	MRTR_C	1.2e-2 (N*sec/mm)
		Boundary Penetration	MRTR_M_PEN	1 (mm)
		Indentation Exponent	MRTR_I_EXP	2
		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)
		Pre Load	NIP_TSD_F	5.e-2 (N)
Flexible Fixed Roller	To Sheet Contact	Stiffness Coefficient	FFRTS_K	1.2 (N/mm)
		Exponent K	FFRTS_K_EXP	1.3
		Damping Coefficient	FFRTS_C	1.2e-2 (N*sec/mm)
		Boundary Penetration	FFRTS_M_PEN	1 (mm)
		Indentation Exponent	FFRTS_I_EXP	2
		Friction Coefficient	FFRTS_MU	1.0
		Threshold Velocity	FFRTS_T_VEL	10.0 (mm/sec)
Flexible Movable Roller	To Sheet Contact	Stiffness Coefficient	FMRTS_K	1.2 (N/mm)
		Exponent K	FMRTS_K_EXP	1.3
		Damping Coefficient	FMRTS_C	1.2e-2 (N*sec/mm)
		Boundary Penetration	FMRTS_M_PEN	1 (mm)
		Indentation Exponent	FMRTS_I_EXP	2
		Friction Coefficient	FMRTS_MU	1.0
		Threshold Velocity	FMRTS_T_VEL	10.0 (mm/sec)
	To Roller Contact	Stiffness Coefficient	FMRTR_K	1.2 (N/mm)
		Exponent K	FMRTR_K_EXP	1.3
		Damping Coefficient	FMRTR_C	1.2e-2 (N*sec/mm)
		Boundary Penetration	FMRTR_M_PEN	1 (mm)
		Indentation Exponent	FMRTR_I_EXP	2
		Friction Coefficient	FMRTR_MU	1.0
		Threshold Velocity	FMRTR_T_VEL	10.0 (mm/sec)
Guides	To Sheet Contact	Stiffness Coefficient	GTS_K	1.2 (N/mm)
		Exponent K	GTS_K_EXP	1.3
		Damping Coefficient	GTS_C	1.2e-2 (N*sec/mm)
		Boundary Penetration	GTS_M_PEN	1 (mm)
		Indentation Exponent	GTS_I_EXP	2
		Friction Coefficient	GTS_MU	0.3
		Threshold Velocity	GTS_T_VEL	10.0 (mm/sec)
		Guide Tolerance	GTS_GT	0.1

24.11.1. Special Parametric Value Editor

Figure 24.104 Special Parametric Value List dialog box

Step to Edit or Export or Import the Special Parametric Value

1. Click the MTT2D icon in the Toolkit tab.

2. Click the SPV icon of the Parameter group in the MTT2D 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.