A New TEHD Approach for Sophisticated Simulation of Journal Bearings 2001-01-3367
The new Thermo-Elasto-Hydro-Dynamic (TEHD) code developed by FEV, is designed to improve the predictability of journal bearing designs and thereby increase the reliability of safety factors in the development of highly loaded internal combustion engines.
Advanced analysis tools are evaluated by their performance as well as by their ease of use. High performance means on the one hand: taking into account all the important characteristics, like bearing elasticity or cavitation effects, to mention only some major parameters for modern journal bearing analysis. On the other hand: an economic run-time behavior must be a key feature concerning usability of the TEHD-demands for daily development praxis. Ease of use means also, that the TEHD model can easily be used as a plug-in routine of an already existing software package that is well known to the development departments.
For this reason, FEV developed a new transient TEHD bearing model which is linkable to established commercial Multi-Body-System (MBS) software packages, like ADAMS®. In principle, this new TEHD model could also be linked to any MBS program, although the connection has only been verified with ADAMS®, so far.
Starting with an introd uction to the major basics of the software interaction organization and the actual TEHD bearing model, the paper presents further details of this new analytical tool. A new modal approach for the bearing's stiffness representation will be shown, leading to a very time-efficient algorithm for sophisticated bearing analyses. Concluding, exemplary results of journal bearing simulations by means of FEV's TEHD code will be presented.