Struct DispBeamColumn3 

pub struct DispBeamColumn3 {
    pub node_i: Node3Id,
    pub node_j: Node3Id,
    pub g: f64,
    pub j: f64,
    pub density: f64,
    /* private fields */
}

DispBeamColumn’s spatial (biaxial) counterpart: a 2-node, displacement-based, fiber-discretized 3D beam-column. Bending in both planes comes directly from FiberSection3 the same way DispBeamColumn gets its single bending plane from FiberSection; torsion is not fiber-derived (see FiberSection3’s doc comment) and is instead a simple decoupled elastic G*J/L term, folded directly into the local tangent/resistance alongside the fiber-integrated axial/biaxial-bending terms — the same decoupling ElasticBeamColumn3 uses for torsion.

vec_xz plus Node3’s coordinates give the local axes via the same GeomTransf3::local_axes/rotation_matrix machinery ElasticBeamColumn3 uses, but only ever in its Linear3 sense — no PDelta3 option is exposed, matching planar DispBeamColumn’s “GeomTransf::Linear only” scope (see its doc comment: a fiber section’s state isn’t a single scalar axial force, so it doesn’t plug into the closed-form geometric- stiffness formula directly, and building the right generalization is deferred, not silently wrong).

Local DOF order per node [u, v, w, rx, ry, rz], matching ElasticBeamColumn3/SpatialDof exactly.

Fields

node_i: Node3Id

node_j: Node3Id

g: f64

j: f64

density: f64

Mass per unit volume, same convention as DispBeamColumn::density.

Implementations

impl DispBeamColumn3

pub fn new( node_i: Node3Id, node_j: Node3Id, g: f64, j: f64, vec_xz: [f64; 3], fibers: Vec<Fiber3>, integration: BeamIntegration, ) -> Self

pub fn with_density(self, density: f64) -> Self

pub fn fiber_responses( &self, node_i: &Node3, node_j: &Node3, ) -> Vec<Vec<(f64, f64)>>

See DispBeamColumn::fiber_responses’s doc comment — same contract, biaxial strain field.

Trait Implementations

impl Clone for DispBeamColumn3

fn clone(&self) -> DispBeamColumn3

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DispBeamColumn3

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.