Altair India

HYPERWORKS FOR STUDENTS

Projects using MotionView and MotionSolve

Analysis and Design of a Valve Train





Areas covered:

Use of an FE mesh to calculate mass and inertial properties.

Creation of tetrahedral meshes.

Transfer between FE models and MDL models.

The use of joints to mimic the effect of contact.

Application of simple-harmonic motion.

Generation of the profile of the cam.

Description of the Problem: There are several different valve-train designs that are tried-and-tested in IC engines. The problem at hand, related to the design of components of the valve-train, addresses two different aspects. First, the engine designers have started working with a particular configuration that has to be detailed. The design is currently undergoing stress analysis, and the cam-profile has to be generated for the specified valve-movement. Second, a proposal has been received for an alternate valve-design. The details are sketchy, but the designers have been asked to verify whether the proposed design functions as claimed. We start with the finite element models of the current configuration, and calculate the required profile of the cam. Once this has been done, we analyse the alternative mechanism to check whether it performs as specified. Note that the two models are totally unrelated: our task is to provide a comparative analysis of the results for both designs.

Design of a Wiper Subsystem





Areas covered:

Use of an FE mesh to calculate mass and inertial properties.

Creation of tetrahedral meshes.

Transfer between FE models and MDL models.

The use of contact to transmit motion.

Description of the Problem: Windscreen wipers for vehicles represent an interesting problem: there are several statutory aspects that must be complied with, such as the time of operation, coverage of the windscreen etc. In addition, the power-consumption of the assembly must lie within the specifications laid out by the OEM. The wiper itself must, obviously, follow the shape of the windshield itself. This is usually done by spring-loading the wiper blade. But if the frictional force is too high, the motor required to drive the wiper blade must generate more power. Our problem concerns a design that is to being used as the basis for an initial quotation. In order to verify that the motor power consumption is adequate, the designers want to carry out an MBD analysis - they wish to generate a graph showing the change in motor-power rating vs. the frictional force on the wiper blade.

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