RS Load Cases – MIDAS Support

1. Description

This component operates the RS Load Cases function in Civil NX.
Enter the load cases, spectrum functions and loading directions for response spectrum analysis.

The RS Load Cases function can be found in the Civil NX main menu,select
[Load] Tab > [Dynamic Loads] Tab > [Response Spectrum Data] Group > [RS Load Cases] Menu

2. Grasshopper Path

[Midas] > [Dynamic Load] > [RS Load Cases]

Damping Method Type 1 : Undefined

3. Component Image

4. Input/Output Value

Input Data

Index	Name	Description	Type	Default	Previous Component
1	KEY	Spectrum Load Case ID	Integer	-	-
2	NAME	Spectrum Load Case Name	String	-	-
3	DESC	Description	String	-	-
4	ANGLE	Excitation Angle	Real	0	-
5	SCALE	Scale Factor	Real	-	-
6	PMFT	Period Modification Factor	Real	-	-
7	aFUNCNAME	Spectrum Name	String	-	-
8	aUSEMODE *	Mode List [Use,Factor]	Array [Boolean,Real]	-	-
9	Direction	Direction	Select	X-Y	-
10	Modal Combination Type	Modal Combination Type	Select	CQC	-
11	Add signs to the results	Add signs to the results	Select	false	-
12	Add signs to the results type	Add signs to the results type	Select	Along the Absolute Maximum Value	-
13	Select mode shapes	Select mode shapes	Select	false	-
14	Interpolation of spectral data	Interpolation of spectral data	Select	Linear	-
15	Apply Damping Method	Apply Damping Method	Select	false	-

Activation Condition
* Only for if Select mode shapes is true

Output Data

Index	Command	Description	Type	Method	Next Component
1	SPEC	Create RS Load Cases (Damping is Undefined)	Json	PUT/DELETE	-

Damping Method Type 2 : Modal

3. Component Image

4. Input/Output Value

Input Data

Index	Name	Description	Type	Default	Previous Component
1	KEY	Spectrum Load Case ID	Integer	-	-
2	NAME	Spectrum Load Case Name	String	-	-
3	DESC	Description	String	-	-
4	ANGLE	Excitation Angle	Real	0	-
5	SCALE	Scale Factor	Real	-	-
6	PMFT	Period Modification Factor	Real	-	-
7	aFUNCNAME	Spectrum Name	String	-	-
8	aUSEMODE *	Mode List [Use,Factor]	Array [Boolean,Real]	-	-
9	DALL	Damping ratio for all modes	Real	-	-
10	aDAMPING	Modal damping overrides - damping ratio List [Mode,Factor]	Array [Integer,Real]	-	-
11	Direction	Direction	Select	X-Y	-
12	Modal Combination Type	Modal Combination Type	Select	CQC	-
13	Add signs to the results	Add signs to the results	Select	false	-
14	Add signs to the results type	Add signs to the results type	Select	Along the Absolute Maximum Value	-
15	Select mode shapes	Select mode shapes	Select	false	-
16	Interpolation of spectral data	Interpolation of spectral data	Select	Linear	-
17	Correction by Damping Ratio	Correction by Damping Ratio	Select	false	-

Activation Condition
* Only for if Select mode shapes is true

Output Data

Index	Command	Description	Type	Method	Next Component
1	SPEC	Create RS Load Cases (Modal)	Json	PUT/DELETE	-

Damping Method Type 3 : Mass & Stiffness

3. Component Image

4. Input/Output Value

Input Data

Index	Name	Description	Type	Default	Previous Component
1	KEY	Spectrum Load Case ID	Integer	-	-
2	NAME	Spectrum Load Case Name	String	-	-
3	DESC	Description	String	-	-
4	ANGLE	Excitation Angle	Real	0	-
5	SCALE	Scale Factor	Real	-	-
6	PMFT	Period Modification Factor	Real	-	-
7	aFUNCNAME	Spectrum Name	String	-	-
8	aUSEMODE *	Mode List [Use,Factor]	Array [Boolean,Real]	-	-
9	MASSC	Direction Specification for Mass Proportional	Real	0	-
10	STIFFC	Direction Specification for Stiffness Proportional	Real	0	-
11	iCALC	Coefficients Calculation Method · Frequency : "1" · Period : "2"	Integer	-	-
12	FP1	Frequency / Period - Mode 1	Real	-	-
13	FP2	Frequency / Period - Mode 2	Real	-	-
14	DR1	Damping Ration - Mode 1	Real	-	-
15	DR2	Damping Ration - Mode 2	Real	-	-
16	Direction	Direction	Select	X-Y	-
17	Modal Combination Type	Modal Combination Type	Select	CQC	-
18	Add signs to the results	Add signs to the results	Select	false	-
19	Add signs to the results type	Add signs to the results type	Select	Along the Absolute Maximum Value	-
20	Select mode shapes	Select mode shapes	Select	false	-
21	Interpolation of spectral data	Interpolation of spectral data	Select	Linear	-
22	Correction by Damping Ratio	Correction by Damping Ratio	Select	false	-
23	Damping Type	Damping Type	Select	Direct Specification	-
24	Mass Proportional	Mass Proportional	Select	true	-
25	Stiffness Proportional	Stiffness Proportional	Select	true	-

Activation Condition
* Only for if Select mode shapes is true

Output Data

Index	Command	Description	Type	Method	Next Component
1	SPEC	Create RS Load Cases (Mass & Stiffness)	Json	PUT/DELETE	-

Damping Method Type 4 : Strain Energy

3. Component Image

4. Input/Output Value

Input Data

Index	Name	Description	Type	Default	Previous Component
1	KEY	Spectrum Load Case ID	Integer	-	-
2	NAME	Spectrum Load Case Name	String	-	-
3	DESC	Description	String	-	-
4	ANGLE	Excitation Angle	Real	0	-
5	SCALE	Scale Factor	Real	-	-
6	PMFT	Period Modification Factor	Real	-	-
7	aFUNCNAME	Spectrum Name	String	-	-
8	aUSEMODE *	Mode List [Use,Factor]	Array [Boolean,Real]	-	-
9	Direction	Direction	Select	X-Y	-
10	Modal Combination Type	Modal Combination Type	Select	CQC	-
11	Add signs to the results	Add signs to the results	Select	false	-
12	Add signs to the results type	Add signs to the results type	Select	Along the Absolute Maximum Value	-
13	Select mode shapes	Select mode shapes	Select	false	-
14	Interpolation of spectral data	Interpolation of spectral data	Select	Linear	-
15	Correction by Damping Ratio	Correction by Damping Ratio	Select	false	-

Activation Condition
* Only for if Select mode shapes is true

Output Data

Index	Command	Description	Type	Method	Next Component
1	SPEC	Create RS Load Cases (Strain Energy)	Json	PUT/DELETE	-

5. Reference API Manual Link

Response Spectrum Load Cases