Nonlinear model identification of oil-lubricated tilting pad bearings

作者：Asgharifard Sharabiani Pouya; Ahmadian Hamid^*

来源：Tribology International, 2015, 92: 533-543.

DOI：10.1016/j.triboint.2015.07.039

• Tilting pad journal bearing
• Nonlinear model
• Oil film forces
• System identification

A new method of modeling and identification of weak nonlinear behavior of tilting pad journal bearings (TPJBs) is proposed. A novel nonlinear model of a TPJB based on a Taylor series expansion of oil film forces, consistent with the transient form of Reynolds differential equation (the original model), is developed. The least mean square technique in time domain is employed to identify Taylor series coefficients of the nonlinear model. The terms with dominant effects on the nonlinear oil film forces are chosen using the subset selection method. Good agreement is achieved between the predicated response obtained from the original model and the one evaluated through using the identified nonlinear model.

• 出版日期2015-12