ADAMS/Engine Advanced Cranktrain

ADAMS/Engine Advanced Cranktrain streamlines the process of including structural flexibility in your engine model. This product assists in creating the FE mesh generation by exporting the relevant node locations for the force and constraint connections, such as bearings based on the rigid body model. The rigid bodies are then replaced with flexible components, such as the crankshaft or engine block. All constraint and force connectors are automatically placed at the correct nodes based on predefined node ids or automatic search of the node ids.

The included hydrodynamic bearing element distributes the oil film on the flexible structures under consideration of the misalignment of the shaft relative to the bearing shell. With this product, it is possible to obtain detailed information regarding the load/oil film in the bearing, as well as structural information in terms of deformation and surface velocities, which may be used for durability or NVH analyses.

ADAMS/Engine Gear

ADAMS/Engine Gear currently contains one gear element that you can use to model straight and helical gears, and three gear-force elements that you can use to couple two gears. A gear is always defined according to the parameters used in the ISO standards. This means, for example, that the profile is based on the involute function and it can be modified through a modification coefficient. The gears interact through the gear-force elements that you should select based on data availability and application.

The three gear-force elements are:

• Three-phase gear force - Is well suited for backlash studies and general vibrations studies of the gear drive. You could use it to determine the acceptable tolerances on the tooth thickness of the gears, for example. When you use the three-phase gear force, you will also get a good idea about the bearing force and moment magnitude in all directions. This is because these result from the pressure and the helix angle, just to mention two of the factors with influence.
  
  
• 2D spur gear force - Is well suited for backlash studies. In addition, this force element considers the individual teeth in contact -- it captures the so-called parameter excitation as the resulting stiffness is constantly changing due to the changing number of teeth in contact and the changing contact location. This force element is currently only applicable for straight gears. The bearing forces and moments are an additional indirect result.
  
  
• Spline gear force - Can be used for NVH analyses since it considers the change in stiffness as the gear rotates one pitch, such that parameter excitation can be represented very accurately. The stiffness characteristic is stored in a property file and may be obtained from FEA or testing. Also, the bearing forces and moments may be obtained from an analysis that includes this gear-force element.

In all cases, the backlash is a result of the tooth thickness. In the case of the latter two force elements, the backlash is also a result of the distance of the gears. None of the gear forces currently produces a reaction moment if the gears are not rotating in the same plane, as may be the case due to bending of the shafts, for example. If you want to produce a reaction moment, it may be appropriate to use one gear-force element between two infinitely thin gears at each edge of the actual gears.

ADAMS/Engine Service Pack

• ADAMS/Engine Release Notes 
• Getting Started Using ADAMS/Engine Advanced Cranktrain 
• Getting Started Using ADAMS/Engine Gear

ADAMS/3D Road allows you to create three-dimensional road profiles which are defined in the .rdf (TeimOrbit) text files. You can then incorporate this .rdf file into both ADAMS/Car and ADAMS/Chassis models for use with ADAMS/Tire Handling Tire. For the 12.0 Service Pack release, only smooth 3D roads are supported (meaning that bumps, potholes, curbs, etc. are not supported). The same road perturbations that are available in 2D Road will be extended to 3D road in a future release.

ADAMS/Tire Service Pack

• ADAMS/Tire Release Notes 
• Understanding the Basics of Using ADAMS/Tire
• Using ADAMS/Tire Tire Models
• Using ADAMS/Tire Road Models