Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"longitudinal force"”.
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Finite element analysis of railway track under vehicle dynamic impact and longitudinal loads
… locomotives leads to significant increase in the longitudinal load demand in railway tracks. The capacity of longitudinal restraint of existing rail fastening system and its dependency on track parameters affects the future design of rail fastening system. This thesis focuses on investigating …
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Experimental Measurements of Longitudinal Load Distributions on Friction Stir Weld Pin Tools
The longitudinal forces generated from the Friction Stir Welding process are substantial. An understanding of these forces is critical to proper tool design. This study describes a technique to measure the longitudinal force distribution on a friction stir weld pin tool. Total longitudinal forces …
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Torsional-axial coupling in the line shafting vibrations in merchant ocean going ships
… propeller thrust fluctuation. Generated longitudinal vibrations due to the thrust variation, can be the cause of excessive ship hull vibrations in modern merchant ocean going ships. The aim of this study is twofold; i.e. to show how the design of the propulsion line shafting affects the …
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Optimal Vehicle Path Generator Using Optimization Methods
… functions; minimum time and maximum tire forces. A three-degree-of freedom vehicle model is used to approximate the handling dynamics of the vehicle. Inputs into the vehicle model are steering angle and longitudinal force at the tire. These two variables approximate two requirements that …
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Lateral tyre forces on off-road surfaces
… phenomena. Mathematical models are proposed for longitudinal, lateral and combined lateral and longitudinal force generation characteristics of off-road tyres. For a better understanding of off-road tyre behaviour, the study of the interaction between the tyre forces and those generated by the …
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Characterisation of mechanical loss in fused silica ribbons for use in gravitational wave detector suspensions
… to be due to bending in the fibre coupling longitudinal force into shear stress. Issues regarding thermal stress at welds are discussed with suggested solutions for construction of Advanced LIGO suspensions.
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A Novel Road Grip Estimation Method Using a Vehicle as a Probe
… between wheel slip ratios and vehicle longitudinal acceleration, which is very similar to the relationship between wheel slip ratio and the tire longitudinal force, is used as the foundation of the estimation algorithm. Vehicle wheel speeds (used to calculate the slip ratio) were …
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Vertical dynamics of railway vehicle-track system
… and used to calculate the normal and geometrical longitudinal forces due to irregularities in the wheel/rail contact region. The developed FE model is validated using the experimental data obtained from British Rail and Canadian Pacific (CP) Rail. The FE results such as natural frequencies of …
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Driver behavior classification and lateral control for automobile safety systems
… work focuses on developing three technologies (longitudinal tire force estimation, driver behavior classification and lateral control) using low-cost sensors that can be utilized in ADAS. For the longitudinal tire force estimation, a low cost 1Hz positioning global system (GPS) and a steering …
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Longitudinal forces in continuously welded rails due to nonlinear track-bridge interaction for loading sequences
… of continuously welded rails (CWR) governs the longitudinal stress caused by seasonal temperature changes, bending of supporting structure and braking/accelerating due to passing trains. Those three loads have been regulated in Eurocode1 and accomplished by the national codes like DIN Fb-101 in …
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A Statistical Approach to Modeling Wheel-Rail Contact Dynamics
… of various factors that exist in practice to longitudinal and lateral tractions and to develop parametric models that can be used for predicting traction in conditions beyond those tested on the rig. The experiment-based models are intended to be an alternative to the classical …