PLOAD1

Bulk Data Entry Defines concentrated, uniformly distributed, or linearly distributed applied loads to the CBAR or CBEAM elements or a SET of such elements at user-chosen points along the axis.

It can also be used to define the EXCITEID field (Amplitude "A") of dynamic loads in RLOAD1, RLOAD2, TLOAD1 and TLOAD2 Bulk Data Entries.

Format


(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
PLOAD1	`SID`	`EID`/ `ELSETID`	`TYPE`	`SCALE`	`X1`	`P1`	`X2`	`P2`
	`ELSET`

Example


(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
PLOAD1	25	1065	MY	FRPR	0.2	2.5E3	0.8	3.5E3

Definitions


Field	Contents	SI Unit Example
`SID`	Load set identification number. In the static solution sequences, the load set ID (`SID`) is selected by the LOAD command in the Subcase Information section. No default (Integer > 0)
`EID`/`ELSETID`	EID: Unique identification number for CBAR or CBEAM element. No default (Integer > 0) ELSETID: A unique identification for a SET of elements. In this case, the `ELSET` continuation line must be specified. Integer Specifies an identification number for the set. <String> Specifies a user-defined string label for the set. 8 (Integer > 0 or <String>)
`TYPE`	Load type. FX, FY or FZ Force in the x, y, or z direction of the basic coordinate system. MX, MY or MZ Moment in the x, y, or z direction of the basic coordinate system. FXE, FYE or FZE Force in the x, y, or z direction of the element's coordinate system. MXE, MYE or MZE Moment in the x, y, or z direction of the element's coordinate system. No default
`SCALE`	Determines scale factor for `X1`, `X2`. 2 - 5 LE Length FR Fractional LEPR Length Projected FRPR Fractional Projected No default
`X1`, `X2`	Distances along the CBAR or CBEAM element axis from end A. If `X2` ≠ `X1`, a linearly varying distributed load will be applied to the element between positions `X1` and `X2`, having an intensity per unit length of bar equal to `P1` at `X1` and equal to `P2` at `X2`. If `X2` is blank or equal to `X1`, a concentrated load of value `P1` will be applied at position `X1`. For `X1`: No default For `X2`: Default = blank (Real, 0 ≤ `X1` ≤ `X2`)
`P1`, `P2`	Load factors at positions `X1`, `X2`. Default = blank (Real or blank)

Comments

If P1=P2 and X2 ≠ X1, a uniform distributed load of intensity per unit length equal to P1 will be applied between positions X1 and X2.
If SCALE=LE (length), the Xi values are actual distances along the element axis, and, if X1 ≠ X2, the Pi are load intensities per unit length of the element.
If SCALE= FR (fractional), the Xi values are ratios of the distance along the axis to the total length, and (if X2 ≠ X1) Pi are load intensities per unit length of the element.
If SCALE=LEPR (length projected), the Xi values are actual distances along the element axis, and (if X2 ≠ X1) the distributed load is input in terms of the projected length of the element.

Figure 1. PLOAD1 Convention on Beam or Bar Elements

If SCALE=LE, the total load applied to the bar is P1 (X2 - X1) in the y-basic direction.
If SCALE=LEPR, the total load applied to the bar is P1 (X2 - X1) cos $α$ in the y-basic direction.
If SCALE=FRPR (fractional projected), the Xi values are ratios of the actual distance to the length of the bar (CBAR entry), and if X1 ≠ X2, then the distributed load is specified in terms of the projected length of the bar.
Loads on CBEAM elements defined with PLOAD1 entries are applied along the line of the shear centers.
If on the TYPE field of the PLOAD1 entry, the element coordinate system direction (for example, TYPE=FYE) option is selected, then the projection (SCALE=FRPR or LEPR) option is ignored and the result is the same as the SCALE=FR (or LE) option.
String based labels allow for easier visual identification of sets, including when being referenced by other cards. For more details, refer to String Label Based Input File in the Bulk Data Input File.
This card is represented as a pressure load in HyperMesh.