VehicleLab / Ride

Quarter-car study

Generic passenger-car quarter model

study statusReady to simulate

ProjectUntitled local project

Project files preserve definitions and context. Results are regenerated by the deterministic solver and exported separately.

Project name OptionalEngineering objective OptionalNotes Optional

Files are processed locally and are never uploaded.

Run provenanceLocal · Float64 · RK4 · Model v0.2.0

Model: vehiclelab.quarter-car.linear-passive v0.2.0
Solver: vehiclelab.rk4.fixed-step v0.1.0
Execution: Browser Web Worker
Precision: Float64
Product: VehicleLab 0.6.0

Model & assumptionsLinear passive 2-DOF · static equilibrium

Quarter-car force path

Arrows indicate the upward-positive displacement convention.

Convention

Static-equilibrium coordinates

Displacements are relative to the loaded static position. Gravity is already balanced and does not appear in the dynamic equations.

Assumptions

Linear, passive, two-degree-of-freedom

Constant spring, damper, tire, and masses; no geometry, pitch, roll, contact loss, nonlinear friction, or control system.

Use boundary

Engineering exploration only

The generic preset is not a production vehicle and does not replace correlation, certification, safety validation, or full-vehicle testing.

Study inputs

Generic passenger-car quarter model

01 Physical parameters

Sprung mass

Unsprung mass

Suspension stiffness

N/m

Suspension damping

N·s/m

Tire stiffness

N/m

Parameter ranges and guidance

Sprung mass: Body-side mass supported by this suspension corner. Accepted: >0 to 2,000 kg.
Unsprung mass: Wheel-side mass represented below the suspension. Accepted: >0 to 500 kg.
Suspension stiffness: Linear spring rate between the sprung and unsprung masses. Accepted: >0 to 500,000 N/m.
Suspension damping: Linear viscous damping across the suspension. Accepted: >0 to 50,000 N·s/m.
Tire stiffness: Linear vertical stiffness between wheel-side mass and road. Accepted: >0 to 2,000,000 N/m.

02 Road scenario

Road input

Prescribed vertical road displacement shared by both configurations.

Start time

The event must finish within the study duration.

Amplitude

Peak half-sine road displacement.

Bump duration

Time until the road returns to zero.

Advanced settingsInitial state · duration · RK4 step

Initial state

State at the start of the study.

Sprung displacement

Sprung velocity

m/s

Unsprung displacement

Unsprung velocity

m/s

Numerical solver

Duration

Accepted: 0.01 to 30 s.

RK4 step

Accepted: 0.0001 to 0.02 s; maximum 100,001 samples.

Fixed-step RK4; one shorter final step is used only when required.

Time-series outputs

Upward-positive / SI units

Preparing the deterministic solver…