Dynamic response caused by rolling contact of rough surfaces
(English)Article in journal (Other academic) Submitted
A new general linear contact-interaction model is derived for treating the dynamic excitation that is due to the rolling contact of rough surfaces. It is shown that the relative-displacement and blocked-force models are special cases of this model. A numerical contact-computation program is utilised to compute the parameters of the contact-interaction model. This program accounts for the detailed surface geometry within the contact region. Furthermore, since contact between rough surfaces is accompanied by locally high stresses, an approximate method for treating plasticity is integrated in to the contact-computation program. The non-stationary response of the contacting bodies is accounted for by a state-space formulation, utilising a modal representation of the dynamic response of the two structures, respectively. As a consequence, the parameters of the contact-interaction model have to be time-dependent. This is dealt with by employing a Monte-Carlo procedure that generates representative time-dependent parameters.
IdentifiersURN: urn:nbn:se:kth:diva-154615OAI: oai:DiVA.org:kth-154615DiVA: diva2:758262
QC 201412222014-10-262014-10-262014-12-22Bibliographically approved