Applied load definition

@APPLIED_LOAD_DEFINITION {
@APPLIED_LOAD_NAME {ApLodName} {
@CONCENTRATED_FORCE_ALONG_i1 {F1}
@DISTRIBUTED_FORCE_ALONG_i1 {Fun1d_F1}
@PRESSURE_ALONG_i1 {PrsTbl_p1}
@FUNCTION_1D_NAME {Fun1dSchedule}
@SCALING_FACTOR {s}
@TRIAD_NAME {TriadName}
@FOLLOWER_FORCE_FLAG {FfFlag}
@COMMENTS {CommentText}
}
}

Introduction

An applied load is a set of known, time-varying, concentrated or distributed forces and moments, or pressures applied to a structure. Applied loads are used in conjunction with vertex, edge, or face loads. The components of the applied loading are resolved in triad TriadName.

Vertex loads

If the applied load is used in conjunction with a vertex load, it should involve the following concentrated forces and moments only. Their magnitudes are defined using one of the following keywords.

Edge loads

If the applied load is used in conjunction with an edge load, it should involve the following distributed forces and moments only. Their spatial distributions are defined using one of the following keywords.

The spacial distributions must be defined for values of 0 ≤ η ≤ 1, where η defines the curve parameterization. One of these key words must be defined. No default value is provided.

Face loads

If the applied load is used in conjunction with a face load, it should involve the following pressure distributions only. Their spatial distributions are defined using one of the following keywords.

NOTES

  1. The temporal schedule of the loading component is defined by a time function, Fun1dSchedule, of type TIME_FUNCTION. This keyword is required. No default value is provided.
  2. Scaling factor s is associated with the applied loading. The loading component is multiplied by this scaling factor. (Default value: s = 1.0)
  3. The loading component can be of two types: dead loads of follower forces, depending on the value of flag FfFlag defined by keyword @FOLLOWER_FORCE_FLAG. (Default value: FfFlag = NO).
    • If FfFlag = NO, the loading component is a dead load, i.e., it acts in a fixed direction in space.
    • If FfFlag = YES, the loading component is treated as a follower loading, i.e., the direction of the applied forces and moments will rotate according to the rotation of the structural point on which the loading is applied.
  4. It is possible to attach comments to the definition of the object; these comments have no effect on its definition.