2447 KB33 KB199920252014Ambrož, MihaPrebil, IvanŠušteršič, Gašperletnik:60številka:9str. 539-548, SI 101ISSN:0039-2480COBISSID:13698587URN:URN:NBN:SI:doc-5ZRBL4F7enZveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikdinamika vozillahki tovorni priklopnikiračunalniška simulacija dinamike tekočinsimulacijasistem togih telesskupina voziltrčno dušenjevijuganjeThe snaking stability of passenger cars with light cargo trailers|This paper presents research conducted to determine whether the detailed multibody system (MBS) model presented in the paper is applicable to modelling the snaking phenomenon and to validate the model, including the parameter values, so that it can be used in further research of vehicle safety systems. Experiments and simulations both show - and with good agreement - that the system of a passenger car and a cargo trailer can become unstable at motorway velocities if the trailer is loaded inappropriately. Based on an analysis of the measured data, the impact-damping phenomenon and its influence on snaking damping have been identified. An MBS analysis of the computational- fluid-dynamics-determined aerodynamic influences on the system's response to an impulse disturbance has shown these influences to be negligible. We have devised the principles and apparatus for measuring the steering-wheel angle, the articulation angle and the lateral force of the trailer's tow bar. Measuring the last of these makes possible an on-the-fly determination of the trailer's yaw inertia, one of the most influential parameters with respect to the snaking phenomenonV strokovnih krogih je bil identificiran problem "vijuganja" (ang. "snaking") lahkih tovornih priklopnikov, ki jih vlečejo osebni avtomobili. Gre za pojav, ko pri določenih pogojih sistem osebnega vozila s priklopnikom postane nestabilen. Vlečno vozilo in priklopnik začneta v ravnini vozišča nihati okoli navpične osi z naraščajočo amplitudo. Če voznik skupine vozil takšnega gibanja ne zazna pravočasno, praviloma to vodi v izgubo nadzora nad skupino vozil in ima za posledico prometno nezgodo. Drugi avtorji so pojav večinoma obravnavali na skupinah osebnih vozil in stanovanjskih priklopnikov. Cilj predstavljenega dela je bil ugotoviti, ali je podroben model na osnovi sistema togih teles (MBS) mogoče uporabiti za modeliranje pojava vijuganja. Na podlagi rezultatov simulacij ter meritev smo želeli ugotoviti, ali so pojavu vijuganja podvrženi tudi lahki tovorni priklopniki in kako na njihovo gibanje vplivajo posamezni parametri skupine vozilTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo