TrainCar Icon

`TrainCar`

This component extends from TranslationalComponents.Mass

Usage

TrainCar(L=0.0, m, g=-9.80665, theta=0.0)

Parameters:

Name	Description	Units	Default value
`L`	Length of component, from left flange to right flange	m	0
`m`	Mass of the sliding body	kg
`g`	Acceleration due to gravity; its effect is scaled by sin(theta) using the specified default or user-provided value.	m/s2	-9.80665
`theta`	Angle defining the path of motion relative to how gravity's influence is calculated as per the component's equations (0 for horizontal).	rad	0

Connectors

flange_a - This connector represents a mechanical flange with position and force as the potential and flow variables, respectively. (Flange)
flange_b - This connector represents a mechanical flange with position and force as the potential and flow variables, respectively. (Flange)

Variables

Name	Description	Units
`s`	Absolute position of center of component	m
`v`	Absolute velocity of the mass along its path of motion	m/s
`a`	Absolute acceleration of the mass along its path of motion	m/s2

\[ \begin{align} \mathtt{flange\_a.s}\left( t \right) &= - \frac{1}{2} L + s\left( t \right) \\ \mathtt{flange\_b.s}\left( t \right) &= \frac{1}{2} L + s\left( t \right) \\ v\left( t \right) &= \frac{\mathrm{d} s\left( t \right)}{\mathrm{d}t} \\ a\left( t \right) &= \frac{\mathrm{d} v\left( t \right)}{\mathrm{d}t} \\ \left( a\left( t \right) + g \sin\left( \mathtt{theta} \right) \right) m &= \mathtt{flange\_b.f}\left( t \right) + \mathtt{flange\_a.f}\left( t \right) \end{align} \]

Source

component TrainCar
  extends TranslationalComponents.Mass
metadata {"Dyad": {"icons": {"default": "dyad://DyadExampleComponents/mass.svg"}}}
end

Flattened Source

component TrainCar
  # Left translational 1D flange
  flange_a = Flange() [{"Dyad": {"placement": {"icon": {"x1": -50, "y1": 450, "x2": 50, "y2": 550}}}}]
  # Right translational 1D flange
  flange_b = Flange() [{"Dyad": {"placement": {"icon": {"x1": 950, "y1": 450, "x2": 1050, "y2": 550}}}}]
  # Absolute position of center of component
  variable s::Dyad.Position
  # Length of component, from left flange to right flange
  parameter L::Length = 0.0
  # Mass of the sliding body
  parameter m::Dyad.Mass
  # Absolute velocity of the mass along its path of motion
  variable v::Velocity
  # Absolute acceleration of the mass along its path of motion
  variable a::Acceleration
  # Acceleration due to gravity; its effect is scaled by sin(theta) using the specified default or user-provided value.
  parameter g::Acceleration = -9.80665
  # Angle defining the path of motion relative to how gravity's influence is calculated as per the component's equations (0 for horizontal).
  parameter theta::Angle = 0.0
relations
  flange_a.s = s - L / 2
  flange_b.s = s + L / 2
  # Velocity is the time derivative of absolute position 's' (likely inherited from PartialRigid)
  v = der(s)
  # Acceleration is the time derivative of velocity 'v'
  a = der(v)
  # Newton's second law: relates inertial forces, gravitational effects (per g, theta), and forces from flanges
  m * (a + g * sin(theta)) = flange_a.f + flange_b.f
metadata {"Dyad": {"icons": {"default": "dyad://DyadExampleComponents/mass.svg"}}}
end

Test Cases

No test cases defined.

Examples
Experiments
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