The FLA_END Statement
- Last UpdatedDec 12, 2023
- 2 minute read
When defining a flange end type, the first thing to do is to choose a basic flange end type. The choice of basic type determines the attributes that are necessary in order to make a correct flange end definition.
The figures in paragraph 1.4 show the basic types and their parameters.
For all basic types except type 1 and 2, the position of the knuckle point, W_KN, must be defined. In analogy with the flange width, W_KN will be calculated according to the formula:
W_KN = KN_H_FACT*H + KN_RAD_FACT*R + KN_T_FACT*T + KN_CONST
where H, R and T have the same meaning as above.
The syntax of the FLA_END statement:
FLA_END, <fla_end_no>
|
/TYPE |
= <basic_type_no> |
||
|
[ |
/DEFAULT |
] |
|
|
[ |
/KN_H_FACT |
= <fact> |
] |
|
[ |
/KN_RAD_FACT |
= <fact> |
] |
|
[ |
/KN_T_FACT |
= <fact> |
] |
|
[ |
/KN_CONST |
= <const> |
] |
|
[ |
/TOL |
= <tolerance> |
] |
|
[ |
/FLA_V |
= <angle> |
] |
|
[ |
/R1 |
= <radius> |
] |
|
[ |
/R2 |
= <radius> |
] |
|
[ |
/TOE_H |
= <distance> |
] |
|
[ |
/TOE_L |
= <distance> |
] |
|
[ |
/DX_P |
= <distance> |
] |
|
[ |
/DY_P |
= <distance> |
] |
|
[ |
/DIST |
= <distance> |
] |
|
[ |
/R_FILLET |
= <radius> |
]; |
|
[ |
/R_FILLET_2 |
= <radius> |
]; |
All the assigned values except <fla_end_no> and <basic_type_no> are real numbers.
[ ] means that the attribute is optional.
|
<fla_end_no> |
is an integer and the user’s reference number for this flange end. It must be a unique number (among flange ends). |
|
/DEFAULT |
Defines a default flange end. The same rules are valid as for the flange type. |
|
/TYPE |
The basic flange end type on which the current flange definition is based. The value of TYPE will affect which of the following attributes that are relevant. |
|
/KN_H_FACT |
Defines constants affecting the position of the knuckle point. If TYPE is 3,4,5 or 9 at least one of the "KN-constants" has to be set. |
|
/TOL |
When flange ends are set along an arbitrary contour, the geometrical conditions may make it impossible or unsuitable to use a certain flange end type. TOL specifies a limit angle that in certain cases is used to decide whether a flange end type should be replaced by another type. Default value: 1. |
|
/FLA_V |
The flange angle. Relevant for all basic flange end types. If the flange angle is not specifically defined with this attribute then it will get the default value 30 degrees. |
|
/R1 |
The radius of the first arc segment, relevant for all basic types, except 1. |
|
/TOE_L |
Relevant for end types 4 and 9 (compulsory for type 9). For its sense, cf. the figures describing these two end types. |
|
/R2 |
Relevant only when TYPE = 9. Please look at the figure Flange End Type 9, to get a description of their geometrical interpretation. The last three parameters are mandatory. |
|
/R_FILLET |
Knuckle softening radius (See Softening of Sharp Corners of Folded Flanges). Default value 0.0 (that means, knuckles retained). |
|
/R_FILLET_2 |
Knuckle softening for the second radius. Default value R_FILLET. |