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Cost savings through compact track loader simulation

ㆍProduct: Compact Track Loader

ㆍAnalysis Goal: Improvement of the durability of the compact track loader

Download PDF File "Cost-effective Compact Track Loader Simulation" (Click)

CASE NEW HOLLAND (CNH), a leading agricultural and construction equipment company, is increasing its motion simulation capabilities as its product designs evolve. One example is the design of compact track loaders that were developed to provide increased traction and reduced ground pressure as compared to traditional skid-steer loaders with tires. Since the simulation results were obtained more quickly than physical testing, CNH could focus on the areas of the design to improve the performance of the product. Through simulation, CNH could achieve system level improvements as well as component level improvements and consequently enhance the product durability of the compact track loader.

Process

① Dynamic modeling of the track system of the compact track loader

② Comparison between the actual test and simulation results, as well as detailed parameter tuning

③ Virtual simulation to generate feasible outputs that are not available or verified from physical testing

④ Durability analysis using the load data and the component stress during worst-case conditions

Compact Track Loader Simulation Model

Key Technologies for Accurate Compact Track Loader Simulation

• Specialized track UI for various track components including rollers and idlers

• Automatic creation of the complex track assembly

• Reduction of modeling time using subsystem

• Force/Torque display to visually verify the load applied to the components

Compact Track Loader Model and Simulation Resutls

Toolkits for Efficient Comptact Track Loader simulation

• RecurDyn/Professional

• RecurDyn/TrackLM

Customer Challenges

• Development of a compact track loader with good durability

• The flexibility behavior of the band track must be taken into account.

• The contact between the track, idlers, and track rollers must be considered.

• Preventing de-tracking when the loader is operating along the side of a slope

Compact Track Loader Simulation Resutls

Solutions

• Fast modeling and simulation of the 3D dynamic model using specialized track UI

• Driving simulation of the compact track loader for various road conditions

• Quantitative evaluation of the load applied to the front and rear idlers and other components under various conditions

• Change of the placements of roadwheels in the track assembly, and center of mass location for the vehicle

• Change of the track tension to prevent de-tracking

• Additional material in locations of high stress

Outcomes of Compact Track Loader Simulation

• Replacing physical testing which saves a large amount of money and time

• Improved product durability from design changes based on simulation results

• Designed for improved product performance

Other Applications

◀ Simulation of Construction machinery using RecurDyn

• Evaluate driving stability and undercarriage durability

• Improve arm and upper frame durability

• Predict track link damage

◀ Short demo about how to use RecurDyn/TrackLM to create a tracked vehicle model easily

• RecurDyn/TrackLM (Track Low Mobility) gives the ability to simulate construction-style tracked vehicles.

• The toolkit supports the easy creation of sprockets, rollers, idlers and link.

• Also, graphical design of sprocket teeth profile and grouser of the track link is supported