Suspension Calculator

Apurva Chakraborty

About this app

Suspension Calculator is an assorted collection of vehicle dynamics mathematical models that enable calculation of static and dynamic properties of a vehicle, thereby furnishing data that is required for the development of a vehicle’s suspension system.

The application offers accurate and efficient analysis tools for scrutinizing vehicle characteristics of race cars, passenger vehicles and light-duty trucks. Furthermore, the application incorporates calculators that facilitate mathematical iterations for designing spring and damper based on user targets and system variables.

The mathematical models integrated into the application are listed below:

ANALYSIS OF VEHICLE CHARACTERISTICS

1. CoG Location
• Horizontal location of CoG
• Vertical location of CoG
• Location of CoG of sprung mass

2. Load Transfer
• Longitudinal load transfer
• Later load transfer
• Wheel loads due to kerb strike
• Wheel loads due to aerodynamic forces
• Wheel loads due to banking
• Wheel loads due to gradient

3. Ride & Roll Behaviour
• Ride rate of a vehicle in quarter car model
• Roll stiffness of a vehicle
• Roll gradient of a vehicle
• Anti-roll bar requirements of a vehicle

4. Pitching Behaviour
• Pitch & Bounce frequencies of a vehicle
• Anti-dive characteristics of a vehicle
• Anti-squat characteristics of a vehicle

DEVELOPMENT OF SUSPENSION SYSTEM

5. Spring Design
• Spring rate calculator
• Single stage spring design calculator
• Double stage spring design calculator
• Preload calculator

6. Damper Design
• Damping force calculator

Shout-out to Sandip Kumar for setting up the mathematical models for this calculator.

Ratings and reviews

This is a great app to do calculations for your suspension system. There is no need to refer the huge vehicle dynamics books or mug up the formulas. All you need to do is input some values and get the result.

Really nice. It has made things simple. Would like to suggest you to give calculations for design of ARB like its dia, material, lever arm distance etc.

From user point of view the App looks like bread and butter for vehicle suspension developers. I can imagine it's script full of complex mathematical equations. Cool works!