Powertrain Motion

LMS Virtual.Lab Powertrain Motion is a complete, integrated solution to simulate complex dynamic engine performance and accurately predict internal loads. It provides dedicated powertrain modeling templates that help users to quickly build detailed models of full powertrain assemblies or specific sub-assemblies. The powertrain template generates fully parameterized models enabling fast modifications and accelerated alternative design analysis.

LMS Virtual.Lab Powertrain Motion

VL Motion Powertrain Motion 01.jpg When developing new and improved engines, engineers often face conflicting design goals. Modern design requires the best of both worlds: reduced engine emissions and fuel consumption with more power, reduced weight and vibrations, optimal sound and maintenance-free operation. LMS Virtual.Lab Powertrain Motion is a complete, integrated solution to simulate complex dynamic engine performance and accurately predict internal loads. Loads are required to determine fatigue life, vibrations and engine radiated noise. Using virtual simulation, engineers can quickly identify the most promising new engine concepts and ideas, such as cam phasers, variable valve-lift devices and variable compression-ratio engines. LMS Virtual.Lab Powertrain Motion also supports engineers investigating shaft whirl, torsion vibrations, chain noise, gear rattle and whine to optimize driveline system dynamics.

LMS Virtual.Lab Powertrain Motion provides dedicated powertrain modeling templates that help users to quickly build detailed models of full powertrain assemblies or specific sub-assemblies like valve train, crank train, driveline, timing chain and belt, geartrain and other accessory drives. Separately created sub-mechanisms can easily be joined together to study coupled behavior. The powertrain template generates fully parameterized models enabling fast modifications and accelerated alternative design analysis.

The LMS Virtual.Lab Motion solver handles a broad range of powertrain applications directly on the virtual model:

Valve train: simulate high-order/high-speed effects including spring surge, cam-contact design, or valve-seating performance
Crank train: analyze crankshaft and engine block interactions, bearing loads, crankshaft vibrations and dynamic stress
Driveline: analyze prop shaft bending and whirl, garage clunk and shift clunk, or driveline booming
Timing chain: quick lay-out and fast recursive solver for dynamic simulation of complicated sprocket, guide, tensioner and chain configurations

Features

Modeling elements for hydrodynamic bearings, flexible valve springs, cam contact forces, hydraulic lash adjuster
Combustion tacho elements apply measured gas forces to pistons and cylinder head
Cam profile synthesis tool
Automatic set-up of valve train parts, gas forces and firing order adapted to engine configuration
Integrated engine-speed controls for simulation of stationary speeds, speed sweeps and transient run-ups
Flexible bodies support dynamic stress computation
Dynamic stress animations indicate failure
Topological hot spot detection ranks the most stressed regions on the FE mesh

Benefits

Templates accelerate crank train, valve train and timing drive systems modeling
Predict loads throughout the powertrain system
Evaluate dynamic stress on different engine regimes to efficiently determine engine vibrations and analyze crankshaft and engine block reliability
Study new engine concepts, such as cam phasers, variable valve-lift devices and variable compression-ratio engines
Design powertrain components while respecting dynamic performance targets
Study belt and chain dynamics and coupled powertrain subsystem behavior

Covering a range of industries, LMS application cases let you discover how LMS solutions help our customers solve their real-life engineering challenges.

Dynamic Motion Simulation DADS Flexible Valve Train 1

DAF Trucks Simulates Flexible Valve Train

DAF Trucks chose LMS DADS because it provides the capability to accurately simulate and animate flexible bodies. DADS uses component modal synthesis to simulate flexible characteristics of rigid body motion which is critical for accurate representation of modern lightweight, high-speed mechanical systems. Flexibility data is automatically extracted from the results of popular FEA programs for use in DADS analysis and animation.

Dynamic Motion DADS Simulation Engine Noise valve design

Dynamic Motion DADS Simulation Engine Noise valve design

GM Saves Money By Eliminating Engine Noise in Concept Phase

General Motors engineers have recently begun using a commercial multibody dynamic code called LMS DADS from LMS International,because it provides the necessary special features such as a cam contact element, combustion force element and helical spring model. The software allows a 3D system to be modeled or imported from major CAD packages, such as CATIA, Pro/ENGINEER, and I-DEAS.

driveline tests multibody simulation engine LMS DADS 3

driveline tests multibody simulation engine LMS DADS 3

GM replaces driveline tests with simulation

General Motors implemented an alternative approach, using LMS multibody simulation software, to evaluate driveline performance using virtual prototypes with a high level of accuracy. “We already succeeded in eliminating 25 tests per year for our 4WD sport utility vehicles and pickup trucks, saving significant costs in material and testing,” said Chandra Shah, Computer Aided Engineering Engineer at General Motors in Detroit, Michigan.

More cases:

Simulation is Key in Design of Revolutionary BMW Valvetronic Engine

Brochures

Download the LMS Virtual.Lab Introduction Brochure

Download the LMS Virtual.Lab Motion Brochure

Demo Movie

Powertrain Motion

Images


	Combustion loads, hydrodynamic bearings and flexible engine block are modeled for accurate and fast results.		Surge effect of the helical spring is captured trough 3D flexible representation.		Coupled cranktrain, valvetrain, timing and accessory drive simulation gives insight into subsystems interaction.

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