Motion inputs / outputs
Kinematics
Investigate heave, steer, roll and bump steer. Examine camber, toe, caster, kingpin, roll centre, steering ratio, Ackermann, motion ratios, “anti” effects and many other KPIs.
BSpoke Automotive / Engineering software
3DSusp Web
Suspension engineering,
from hardpoints to the full vehicle.
Connect geometry, kinematics, loads, setup and optimization in one browser workspace. Develop the architecture, investigate its behaviour and refine the geometry with immediate feedback.
Browser-based workspaceLocal calculationsCustom reports
Free access with registration. Beta version for evaluation purposes.
01 / Model definition
Design the architecture.
Refine every connection.
Start with the suspension layout, then add the auxiliary elements. Springs, pushrods, pullrods and anti-roll bars can connect to upright, wishbone, single-link or rocker elements.
Suspension architectures
- Double wishbone
- Five-link
- Hybrid: wishbone + multilink
- MacPherson strut / split links
- Integral link
- Semi-trailing arm
Actuation & coupled elements
- Pushrod / pullrod / torsion bar
- C-shape and T-shape anti-roll bars
- Third element
- Decoupled heave spring / roll spring
- Steering system
- Driveshafts
02 / Kinematics & loads
One geometry.
Two connected layers of analysis.
Motion studies and quasi-static force paths use the same hardpoints, wheel definition and operating state.
Force inputs / outputs
Load paths
Apply contact-patch and wheel-centre forces and moments. Inspect link loads, reactions at the spring and chassis pick-up points, anti-roll actions, rocker torque and the resulting force paths.
03 / Built-in optimization
Target curves become
hardpoint coordinates.
The built-in, multi-variable, multi-target optimization engine refines the geometry in seconds. A self-developed solver moves selected hardpoints inside constrained 3D domains, targeting user-defined kinematic gradients or curves.
- 01
Variables
Select the hardpoints to move.
- 02
Domains
Constrain their allowable 3D regions.
- 03
Target curves
Define the required kinematic response.
- 04
Convergence
Follow the solution as the geometry is refined.
04 / Performing setup modifications
Replicate setup adjustments.
Apply controlled static changes, compare the solved state with the baseline, then apply or export the modified setup.
Setup mode
- Modify ride height through pushrod, spring or split-rocker independent adjustments.
- Vary wishbone link and track-rod lengths.
- Switch chassis-side pick-up points.
- Add wheel-side camber shims.
- Compare baseline and modified camber, toe, caster, ride height and other setup outputs.
- Inspect spring-length and motion-ratio variations.
- Use ghost geometry, synchronized 2D/3D views and a live monitor.
Fine-tuning the motion ratio
Rocker mode.
A different point of view.
Define pushrod, spring, anti-roll bar and rocker coordinates in the local rocker plane. Inspect motion ratios, lengths, angles and moment arms, then apply the modifications.
05 / Speeding up the design process
Front and rear ends.
One vehicle model.
Full vehicle mode connects both axles in the same workspace. Synchronize the motion to investigate the suspension behaviour at vehicle level.
- Axle pairing
- Load a second .SPM as the auxiliary axle while the current model remains primary.
- Automatic placement
- Wheelbase and contact-patch references position the auxiliary model consistently.
- Vehicle-level comparison
- Synchronize motion and compare front and rear axle behaviour in heave and roll.
06 / The engineering workspace
CAD context within
the suspension model.
Import STEP bodywork around the live suspension model. Generate and export the wheel envelope to CAD for packaging and interference assessment.
STEP mesh import
Place bodywork, wings, uprights or packaging volumes in the same 3D context as the suspension.
Custom tyre profile
Import your 2D tyre profile, generate the wheel envelope across the full heave and steer range, and export the envelope surface as a STEP file.
Clash & interference checks
Detect interference between bodywork, suspension links, springs and rocker, and the tyre/wheel envelope.
Race-car STEP model credit: Fahmi Fitra / GrabCAD
07 / 3DSusp Web
From the desktop application
to the browser workspace.
Introduced seven years after the original desktop version, 3DSusp Web brings suspension kinematics design and analysis to the browser. Develop complex layouts from a first draft, optimize with the built-in multi-variable, multi-target engine, investigate load paths and customize your reports.
Trackside setup, rocker-plane and full vehicle modes extend the workflow. Development continues, with more capabilities to come.
Available in beta
Explore 3DSusp Web
Access is free with registration. The beta version is intended for evaluation purposes.
Access the betaTo report a bug or share a suggestion, write to info@bspokeautomotive.it.
Keep the technical overview
The complete brochure
All eight slides, including the original technical illustrations, available as a downloadable PDF.
Download brochure PDFPDF · 8 pages · 1.4 MB
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