MASTA brings together high-fidelity NVH analysis and practical usability, enabling engineers to evaluate, visualise, and optimise vibration and noise with confidence
Full Workflow with Single Software Solution
From calculation of excitations to structural and air borne noise simulation
- Calculation of gear excitations using high fidelity Loaded Tooth Contact Analysis, including TE and varying misalignment (shuttling force)
- Automated optimisation of gear micro geometry for low noise, while maintaining durability targets, via AI based optimisation
- Calculation of electric machine excitations, torque ripple and stator tooth dynamic loads, using FE based electromagnetic simulation
- Structure borne noise assessment via mount point vibrations
- Airborne noise assessment via housing accelerations and fast calculation of Equivalent Radiated Power or more accurate calculation of pressures via full acoustic simulation.
Excitations
MASTA is the only tool to include both design and analysis capabilities for transmissions and electric machines
- Transmission Error excitation at multiple levels of fidelity
- Misalignment excitation
- Electric Machine excitation calculation integrated
- Response to all excitations can be considered in the same analysis.
Rapid Frequency Domain Analysis
Analyse your system’s NVH in seconds, not days.
MASTA’s core frequency-domain NVH capability produces fast, reliable results that accelerate design cycles and let engineers resolve NVH problems in real time. Faster runs mean more iterations and better-optimised powertrain NVH.
Advanced Frequency Domain Tools
SMT are continually developing tools to make NVH troubleshooting and optimisation as easy as possible. Some of these tools are:
- Identify key transfer paths from transmission internals to housing via Transfer Path Analysis.
- Consider torque and speed dependence of gear and motor whine via NVH Operating Maps across the whole operating range and under the true operating conditions.
- Detailed 3D Modal Analysis to understand the vibration shapes and contributors in the system.
- Integrated Acoustic Analysis for the calculation of sound pressures at specified microphone locations.
Powerful Multibody Dynamics
Not all NVH problems are linear.
MASTA is capable of Multibody Dynamics calculations to analyse non-linear events such as Spline Rumble and Unloaded Gear Rattle.
- Spline Rumble – In EV applications the transmission input shaft is often connected via a spline to the motor rotor shaft. In such cases errors in the alignment of the shafts and pitch errors in the spline can lead to a noise problem known as spline rumble. This highly non-linear problem can be successfully analysed via time domain simulation in MASTA.
- Gear Rattle – Time domain simulation of highly non-linear gear rattle phenomenon
Sideband Analysis
Bespoke Separation of Timescales Timestepping Solution
- ATSAM is an advanced method for assessment of gear whine in planetary systems or gear blanks with holes.
- Holes in gear blanks can disrupt resonances leading to dynamic behaviour which cannot be analysed using standard frequency domain models. With proper tuning gear blank holes can be designed to improve system dynamics. MASTA includes a bespoke separation of timescales timestepping solution to analyse this phenomenon.
Rotor Dynamics
Consideration of the speed dependency of system modes for the coupled gear system in high-speed applications. Calculation of the response to excitations such as shaft unbalances.
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