De Saxe, C2013-02-182013-02-182012-12De Saxe, C. 2012. Performance-based standards for South African car-carriers. MSc(Eng) dissertation, Dep. of Engineering and Built Environment, Wits University.http://wiredspace.wits.ac.za/handle/10539/12333http://hdl.handle.net/10204/6557Copyright: 2012 Wits University. This is an ABSTRACT ONLY. The definitive version is published in WIREDSpace. http://wiredspace.wits.ac.za/handle/10539/12333Until recently, car-carriers in South Africa operated under abnormal load permits allowing a finite relaxation of legal height and length limits. This practice is being phased out, and exemption will only be granted if a car-carrier complies with the Australian Performance-Based Standards (PBS) scheme. A low-speed turning model was developed in Matlab®, and used to benchmark the tail swing performance of the existing South African car-carrier fleet. About 80 per cent of the fleet were shown to not comply with the 0.30 m tail swing limit; due to South Africa's inadequate rear overhang legislation which permits tail swing of up to 1.25 m. TruckSim® was used to conduct detailed PBS assessments of two car-carrier designs. Critical performance areas were identified; most notably yaw damping and tail swing for the truck and tag-trailer combination, and maximum of difference and difference of maxima for the tractor and semitrailer combination. These were remedied through appropriate design modifications. The Matlab® model was shown to be versatile, accurate and efficient, with potential for future application. The TruckSim® assessments highlighted complexities unique to car-carriers in a PBS context and showed how these may be addressed. This research has shown the benefit of PBS for heavy vehicles, and has guided car-carrier design to improve safety.enPerformance-based standardsHeavy vehicle safetyCar-carriersVehicle dynamics simulationTail swingLow-speed turningReportDe Saxe, C. (2012). <i>Performance-based standards for South African car-carriers</i> (Workflow;10143). WIREDSpace. Retrieved from http://hdl.handle.net/10204/6557De Saxe, C <i>Performance-based standards for South African car-carriers.</i> Workflow;10143. WIREDSpace, 2012. http://hdl.handle.net/10204/6557De Saxe C. Performance-based standards for South African car-carriers. 2012 [cited yyyy month dd]. Available from: http://hdl.handle.net/10204/6557TY - Report AU - De Saxe, C AB - Until recently, car-carriers in South Africa operated under abnormal load permits allowing a finite relaxation of legal height and length limits. This practice is being phased out, and exemption will only be granted if a car-carrier complies with the Australian Performance-Based Standards (PBS) scheme. A low-speed turning model was developed in Matlab®, and used to benchmark the tail swing performance of the existing South African car-carrier fleet. About 80 per cent of the fleet were shown to not comply with the 0.30 m tail swing limit; due to South Africa's inadequate rear overhang legislation which permits tail swing of up to 1.25 m. TruckSim® was used to conduct detailed PBS assessments of two car-carrier designs. Critical performance areas were identified; most notably yaw damping and tail swing for the truck and tag-trailer combination, and maximum of difference and difference of maxima for the tractor and semitrailer combination. These were remedied through appropriate design modifications. The Matlab® model was shown to be versatile, accurate and efficient, with potential for future application. The TruckSim® assessments highlighted complexities unique to car-carriers in a PBS context and showed how these may be addressed. This research has shown the benefit of PBS for heavy vehicles, and has guided car-carrier design to improve safety. DA - 2012-12 DB - ResearchSpace DP - CSIR KW - Performance-based standards KW - Heavy vehicle safety KW - Car-carriers KW - Vehicle dynamics simulation KW - Tail swing KW - Low-speed turning LK - https://researchspace.csir.co.za PY - 2012 T1 - Performance-based standards for South African car-carriers TI - Performance-based standards for South African car-carriers UR - http://hdl.handle.net/10204/6557 ER -