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 14 of 14 for “"mode of vibration"”.
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Innovative topics in structural engineering and real estate development : blast resistant facades & incentives for large-scale smart growth development
… parts. Part 1 relates to the requirements of the S.M.C.E.E. degree, and Part 2 relates to the M.S.R.E.D. degree. Part 1: The Influence of Boundary Conditions and Higher Mode Shapes on First-Crack Prediction for Blast-Resistant Glazing Systems: This study reviews the extent to which two …
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Experimental and finite element modelling of ultrasonic cutting of food
… become an established technology in a variety of industries including the food processing industry to cut a variety of materials. An ultrasonic cutting system consists of a generator, transducer and either a single or multiple blade cutting devices tuned to a specific mode of vibration, …
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Thermomechanical and Vibration Analysis of Stiffened Unitized Structures and Threaded Fasteners
… approach using the commercial finite element software ANSYS while a fully functional code using isogeometric analysis was developed from scratch for the latter. For the threaded fasteners, a global simplified 3D model is built to evaluate the deformation of the structure. A second local model …
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Free and Forced Vibration of Linearly Elastic and St. Venant-Kirchhoff Plates using the Third Order Shear and Normal Deformable Theory
… study three problems involving free and forced vibrations of linearly and nonlinearly elastic plates with a third order shear and normal deformable theory (TSNDT) and the three dimensional (3D) elasticity theory. We used the commercial software ABAQUS for analyzing 3D deformations, and an …
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Prediction of the off-road rigid-ring model parameters for truck tire and soft soil interactions
… and cost savings can be realized through the use of virtual simulation of testing procedures across diverse areas of research and development. Fully detailed virtual truck models using the simplified off-road rigid-ring model parameters may further increase these economical savings within the …
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Modal Analysis of the Ice-Structure Interaction Problem
… study, the author builds upon the single degree of freedom ice-structure interaction model initially proposed by Matlock, et al. (1969, 1971). The model created by Matlock, et al. (1969, 1971), assumed that the primary response of the structure would be in its fundamental mode of vibration. In …
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A Comprehensive Experimental Evaluation of Actively Controlled Piezoceramics with Positive Posistion Feedback for Structural Damping
This study evaluates the effectiveness of actively controlled piezoceramics with positive position feedback (PPF) for reducing structural vibrations. A comparison is made between active control with PPF and a parallel resistor-inductor (RLC) shunt technique. The primary objectives of this study are …
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Accuracy Improvement in Robotic Milling Through Data-Driven Modelling and Control
Six degree of freedom (6-dof) articulated arm industrial robots are promising candidates for aerospace machining operations such as milling due to their low-cost and large workspace compared to Computer Numerical Control (CNC) machine tools. However, the instantaneous position accuracy of …
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Vibration of stressed shells of double curvature
Shells of double curvature are common structural elements in aerospace and related industries, but due to the complexity of their configurations and governing equations, little has been done to classify their general dynamic behavior. The subject of this dissertation is the determination of the …
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Improved ground motion intensity measures for reliability-based demand analysis of structures
… the seismic performance (or seismic risk) of a structure at a designed site has gained major attention, especially in the past decade. One of the objectives in PBEE is to quantify the seismic reliability of a structure (due to the future random earthquakes) at a site. For that purpose, …
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The tuned mass damper inerter for passive vibration control and energy harvesting in dynamically excited structural systems
A novel passive vibration control configuration, namely the Tuned-Mass-Damper-Inerter (TMDI) is proposed in this work. The TMDI combines the “inerter”, a mechanical two-terminal flywheel device developing resisting forces proportional to the relative acceleration of its terminals, with the …
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Theoretical Parametric Study of Through-Wall Acoustic Energy Transfer Systems
… physical wires. In the past decade, awareness of the need to wirelessly power electrical components spawned many forays into the field of wireless power transfer (WPT). WPT techniques include capacitive energy transfer, electromagnetic inductive power transfer, electromagnetic radiative power …
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Vibration Serviceability of Long Span Slender Floors
The modern trend towards long slender floors has led to major vibration serviceability issues in building floors under rhythmic loading. This happens as a result of reduced natural frequencies and damping ratios due to reduced structural rigidity (Devin et al, 2015). Even though these vibrations do …
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Dynamická analýza lehké mostní konstrukce
… buzení chodci a seismickým zatížením. Lávka byla modelována pomocí metody konečných prvků v softwaru Ansys verze 15.0 a zároveň také v softwaru RFEM verze 5.05. Modely byly mezi sebou srovnány. Odezva na dynamické zatížení chodci byla následně vyhodnocena v souladu s technickou normou ČSN EN …