Struct MassElement 

pub struct MassElement {
    pub mass_kg: f64,
    pub cg_m: f64,
    pub axial_inertia_kg_m2: f64,
    pub transverse_inertia_kg_m2: f64,
}

A mass on the motor axis, with its moments of inertia about its own center of mass.

Fields

mass_kg: f64

Mass, kg.

cg_m: f64

Center of mass along the motor axis, m from the nozzle exit toward the forward end.

axial_inertia_kg_m2: f64

Moment of inertia about the motor axis, through the element’s center of mass, kg·m².

transverse_inertia_kg_m2: f64

Moment of inertia about a transverse axis through the element’s center of mass, kg·m².

Implementations

impl MassElement

pub const ZERO: Self

A massless element at the origin.

pub fn thin_tube(mass_kg: f64, cg_m: f64, radius_m: f64, length_m: f64) -> Self

A thin-walled tube of radius radius_m and length length_m centered at cg_m: I_a = m r², I_t = m (r²/2 + L²/12).

pub fn hollow_cylinder( mass_kg: f64, cg_m: f64, outer_radius_m: f64, inner_radius_m: f64, length_m: f64, ) -> Self

A hollow cylinder of outer radius outer_radius_m, inner radius inner_radius_m and length length_m, centered at cg_m: I_a = ½ m (R² + r²), I_t = m ((R² + r²)/4 + L²/12). An inner radius of zero gives a solid cylinder.

pub fn combine<'a>( elements: impl IntoIterator<Item = &'a MassElement> + Clone, ) -> Self

The elements combined into one: total mass, mass-weighted center, and inertias moved to that center with the parallel-axis theorem. With zero total mass the center is the plain average of the element positions (or 0 with no elements) and the inertias are summed; a NaN mass gives a NaN center.

pub fn transverse_inertia_about(&self, z_m: f64) -> f64

The transverse moment of inertia about an axis through z_m instead of the center of mass, kg·m² (the parallel-axis theorem).

Trait Implementations

impl Clone for MassElement

fn clone(&self) -> MassElement

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for MassElement

impl Debug for MassElement

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MassElement

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for MassElement

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl PartialEq for MassElement

fn eq(&self, other: &MassElement) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for MassElement

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for MassElement