Struct GroundMotion 

pub struct GroundMotion {
    pub direction: usize,
    pub series: LoadSeries,
    pub scale_factor: f64,
}

Uniform ground-motion excitation in one direction — Xara/OpenSees’s UniformExcitation. TransientAnalysis uses this to add the effective inertial force -M·ι·ag(t) (standard formulation, e.g. Chopra, “Dynamics of Structures”) to each Newmark step’s load, where ι is the unit influence vector selecting every free DOF in direction (Domain::direction_incidence) and ag(t) is this motion’s acceleration at time t. An accelerogram is exactly a LoadSeries:: Path (piecewise-linear interpolation over recorded points) — no separate series type needed; this reuses the same LoadSeries a static LoadPattern would.

Fields

direction: usize

series: LoadSeries

scale_factor: f64

Implementations

impl GroundMotion

pub fn new(direction: usize, series: LoadSeries) -> Self

direction: which DOF index (0 = x, 1 = y) the acceleration acts along, applied uniformly to every node’s mass in that direction.

pub fn with_scale_factor(self, scale_factor: f64) -> Self

E.g. a PGA scale on top of series’s own values.

Trait Implementations

impl Clone for GroundMotion

fn clone(&self) -> GroundMotion

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GroundMotion

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

Formats the value using the given formatter.