Search for dissertations about: "Modal shift"
Showing result 11 - 15 of 29 swedish dissertations containing the words Modal shift.
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11. Acoustical Characteristics of Aircraft Panels
Abstract : A deterministic approach based on a modal expansion and modal receptance method has been developed to evaluate the airborne sound insulation of aircraft panels with stringer and ring frame attachments. Furthermore, this method was extended to predict the noise radiation of stiffening panel subjected to TBL excitation. READ MORE
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12. Role of a dry port stakeholder network in intermodal transportation
Abstract : The concept of a dry port, which emerged from intermodal transportation research approximately 20 years ago, has gained popularity due to its financial benefits and positive environmental impact. The core idea behind the dry port concept is the establishment of high-capacity intermodal transportation in the seaport’s hinterland. READ MORE
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13. Time-domain modelling of curve squeal: a fast model for one- and two-point wheel/rail contact
Abstract : Curve squeal is a type of railway noise that may arise when a railway vehicle negotiates a relatively tight curve. A single frequency, corresponding to a wheel mode, dominates the radiated sound, which makes squeal a very tonal noise. READ MORE
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14. Stability and transition on wind turbine blades
Abstract : Transition on wind turbine blades is a highly complex phenomenon due to the myriad effects influencing the process. This thesis studies some of them, namely free-stream turbulence (FST), rotation, and three-dimensionality. The investigations employ large eddy simulations (LES) with and without (implicit or wall-resolved LES) a subgrid-scale model. READ MORE
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15. Optical Imaging for Nanowire Mechanics
Abstract : In this work, we present a stroboscopic detection technique for the study of oscillating nanoscale objects. This optical read-out gives a position accuracy better than 1 nm which is a fraction of both the diffraction limit and the pixel size. READ MORE