Methods comparison in computation of temperature rise on frictional interfaces

Numerical methods in calculation of temperature rise on friction surfaces are compared with respect to computational speed and numerical accuracy. The calculation includes two steps, determination of influence coefficients and multi multiplication and summation. There are several schemes, the bilinear interpolation, rectangle approximation or Green's function (GF)-based scheme, available for the calculation of influence coefficients while the summation operation may be implemented by use of one of the following methods: the direct summation (DS), multi level multi integration (MLMI) or FFT-based methods. The bilinear interpolation method are applied for the first time in temperature rise computation. The principle and implementation of the FFT-based algorithm is described in detail. Results show that a combination of GF-based scheme plus FFT-based method has the highest efficiency and acceptable accuracy, especially favorable for the large amount of computation in simulations of real rough surfaces.