TY - CHAP A1 - Sterner, Michael A1 - Eckert, Fabian A1 - Henning, Hans-Martin A1 - Trost, Tobias T1 - Speicherbedarf im Verkehrs- und Chemiesektor T2 - Energiespeicher - Bedarf, Technologien, Integration KW - Speicherbedarf KW - Verkehrssektor KW - Chemische Industrie Y1 - 2017 SN - 978-3-662-48893-5 SN - 978-3-662-48892-8 U6 - https://doi.org/10.1007/978-3-662-48893-5_5 SP - 169 EP - 192 PB - Springer Vieweg CY - Berlin ; Heidelberg ET - 2. Auflage ER - TY - CHAP A1 - Briem, Ulrich ED - Dohm, Martin T1 - Mathematical Approach to Curve Line of free bent Ropes T2 - Proceedings of the OIPEEC Conference, La Rochelle, France, 12th - 15th March 2019 N2 - The rope curve line of a tensioned rope can be described by means of the catenary curve. Opposed to that, the curved line of a free bent rope cannot be described by an analytical function. Practical applications of free bending are for example at tail ropes at the bottom of shaft in rope drives with traction sheaves. The question whether the maximum diameter of rope loop is small enough for the diameter of the shaft is highly interesting. In [1] a method was presented to calculate the curved line of free bent ropes numerically by help of energy methods. An analytical description of rope curve line would be very helpful. Beginning with the structure of a rope curve line of tensioned rope (catenary curve) and considering the influence of bending stiffness, the structure of an analytical equation for the curve line of a free bent rope will be developed. The main focus of this paper is to develop and to describe the structure of such an analytical equation. To get a first idea about the values of the constants in that analytical equation a few test results were evaluated. But these equations consider the static rope behavior only. Due to dynamic effects in the rope while running through the loop at the bottom of a shaft, pendulousness of the tail rope occurs. KW - Bending Stiffness KW - Catenary KW - Free Bending KW - Rope Curvature KW - Tail Ropes Y1 - 2019 UR - https://oipeec.org/products/mathematical-approach-to-curve-line-of-free-bent-ropes PB - OIPEEC ER - TY - JOUR A1 - Rill, Georg T1 - Reducing the cornering resistance by torque vectoring (X International Conference on Structural Dynamics, EURODYN 2017) JF - Procedia Engineering N2 - Usually, torque vectoring is used to reduce a significant understeer behavior at high speed cornering. Thus, providing larger vehicles with a sportive touch. Even on typical front wheel driven cars torque vectoring control is available now. Torque vectoring is nearly a standard on electric driven vehicles. Complex control and optimization strategies are applied to improve the maneuverability in particular or to enhance the driving behavior and reduce the energy consumption in addition. This paper shows, that a quite simple strategy will enhance the maneuverability and simultaneously reduce the cornering resistance in sharp bends. At first, a case study with a fully non-linear and three-dimensional vehicle model is performed. It turned out that a full drive torque shift to the outer wheels improves the maneuverability and reduces the cornering resistance in addition. This results are verified by an optimization performed with a simpler four-wheeled handling model. Here, the front steering angles and the driving torques at each of the four wheels are considered as free parameters. Minimizing the cornering resistance by taking the equations of motion for the four-wheeled handling model as constraints will deliver an optimal set of parameters then. KW - Constrained Optimization KW - Cornering Resistance KW - Four-wheeled Handling Model KW - Three-dimensional Vehicle Model KW - Torque Vectoring Y1 - 2017 U6 - https://doi.org/10.1016/j.proeng.2017.09.393 VL - 199 SP - 3284 EP - 3289 PB - Elsevier ER -