NSML1

Bulk Data Entry

NSML1 – Lumped Non-structural Mass, Alternate Form 1

Description

Defines lumped non-structural mass for a list of elements or properties.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
NSML	3	ELEMENT	0.06	1	2	3	4

Alternate Format and Example

Field	Contents
SID	Non-structural mass set identification number. No default (Integer > 0)
TYPE	This can be one of the properties PSHELL, PCOMP, PBAR, PBARL, PBEAM, PBEAML, PROD, CONROD, PSHEAR, or PTUBE, in which case the list of IDs will refer to properties of the stated type, or it can be ELEMENT, in which case the list is of individual element IDs of elements that can have NSM. It can also be of type ELSET, in which case, it is an element SET ID. No default (PSHELL, PCOMP, PBAR, PBARL, PBEAM, PBEAML, PROD, CONROD, PSHEAR, PTUBE, ELEMENT, or ELSET).
VALUE	A lumped mass value to be distributed over all the listed elements and elements referencing listed properties. No default (Real)
ID	Property, Element ID, or Element Set ID depending on the TYPE definition. No default (Integer > 0, or "THRU")

1.	Refer to Non-structural Mass in the User's Guide for more information on the use of this card.

2.	Non-structural mass in this format must be selected by the NSM Subcase Information selector.

3.	This entry will calculated an equivalent non-structural mass per unit area or per unit length using the lumped mass values provided.

For "area" elements, the calculation is:

nsml1

and for "line" elements, the calculation is:

nsml2

4.	You cannot mix "area" and "line" elements on the same entry. The "area" elements are: CQUAD4, CQUAD8, CTRIA3, CTRIA6, and CSHEAR; and the "line" elements are: CBAR, CBEAM, CTUBE, CROD, and CONROD.

5.	The value of the non-structural mass does not change during Topology Optimization.