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.
Results
Showing 1 to 20 of 27 for “"piping systems"”.
-
A simple new element for linear and nonlinear analysis of piping systems
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1982.
-
Prediction and mitigation of erosive-corrosive wear in steam extraction piping systems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1987.
-
Passive damping mechanism of Herschel-Quincke tubes for pressure pulsations in piping systems
The acoustic pressure pulsations in industrial piping systems can induce fluctuating loads on inline equipment which may cause fatigue failure and in severe cases, initiate a phenomenon known as acoustic resonance. Passive damping devices such as the Herschel-Quincke (HQ) Tube can be implemented …
-
The Determination of Periodic Pulsating Flow in Complex Piping Systems Bythe Impedance Method
Made available in DSpace on 2014-12-09T17:13:46Z (GMT). No. of bitstreams: 1 6901485.pdf: 3825252 bytes, checksum: 8a12f6b1345fcb7f513c3ce814c2e771 (MD5) Previous issue date: 1968
-
Design and control of a spheroidal underwater robot for the inspection of nuclear piping systems
… to the hazardous conditions within the tanks and piping systems. In response, the d'Arbeloff Laboratory in the Mechanical Engineering department is designing a compact submersible robot that is capable of precise navigation and maneuvering in order to detect defects within water filled piping …
-
Active/Passive control of fluid-borne and structure-borne disturbances in fluid-filled piping systems
… or structure-borne, due to the complexity in piping installation designs and the strong coupling between the fluid and shell walls. It is necessary to devise control approaches that tackle both components of the excitation simultaneously. This study will demonstrate new approaches in active …
-
Análise de tensões primárias e secundárias em sistemas de tubulação
It is presented a static stress analysis for a piping system and it is emphasized how it is important the distinction between primary and secordary stresses.Particular emphasis is done on secondary stress analysis and on ANSI B 31.3 (American National Standard Code for Pressure Piping) criteria for …
-
ΑΝΤΙΠΛΗΓΜΑΤΙΚΗ ΠΡΟΣΤΑΣΙΑ ΤΩΝ ΑΡΔΕΥΤΙΚΩΝ ΔΙΚΤΥΩΝ
… OF WATER HAMMER PHENOMENA IN PRESSURERIZED PIPING SYSTEMS IS INVESTIGATED BY THE USE OF PRESSURE RELIEF VALUES. A MATHEMATICAL MODEL FOR THE CASE OF THE RELIEF VALUE IS DEVELOPED. THIS MODEL IS INTRODUCED IN THE ANALYSIS OF WATER HAMMER IN PIPING NETWORKS. IN ADDITION THE METHOD OF FREE …
-
The Effects of Strain Induced Softening on the Load Carrying Capability of Components
… 2.25 Cr 1 Mo steel in pressure vessels and piping systems. This material has a bainitic microstructure with improved short term strength characteristics over the more commonly used annealed form. The bainitic material cyclically softens, however, losing as much as 30 percent of its initial …
-
Pulse Propagation in Fluid-Filled Elastic Curved Tubes
… consideration in the safety analysis of nuclear piping systems. In this study, one-dimensional governing equations for the propagation of pressure pulses in an inviscid compressible fluid contained in a thin-walled naturally curved elastic tube is formulated. The method of characteristics is used …
-
Damping acoustic pressure pulsations in pipelines using Helmholtz resonators
In industrial piping systems, centrifugal and reciprocating turbomachinery generate acoustic pressure pulsations, which propagate into the pipeline and interact with piping components, potentially causing vibrations, increased fretting wear, and even fatigue failure. In this thesis, an acoustic …
-
Um programa para o cálculo automático estático e dinâmico de sistemas de tubulações
… for static and dynamic analysis of linear piping systems. Some special elements are developed to represent straight and curved pipe, and rigid components as well. It is possible to include in the analysis: mitre bends, valves, flanges, expansion joints and elastic restraints, among others …
-
Determining the parameters of cylinders using digital photogrammetry for application to pipe measurement in industrial plants
The maintenance and expansion of piping systems of petro-chemical plants is a complex and costly process. These costs can be reduced by knowledge of the as-built dimensions and layout of the piping system. As-built Computer Aided Design (CAD) models of such piping systems, specifically the use of …
-
Active, Passive and Active/Passive Control Techniques For Reduction of Vibrational Power Flow in Fluid Filled Pipes
… of vibrational energy flow in fluid filled piping systems makes its control and subsequent reduction a difficult problem. This work experimentally explores the potential of different active, passive and active/passive control methodologies for control of vibrational power flow in fluid …
-
Minimization of stresses and pressure surges in pipes using nonlinear optimization.
… stresses and pressures in liquid-filled piping systems. The friction force is included in the equations of motion for the fluid and the pipe wall. The maximum pressure and maximum stress at any point along the length of the pipe are evaluated for the entire simulation time. A nonlinear …
-
On the vibration analysis of a complex foundation
… of a lumped-mass approximation of a multi-anchor piping system or foundation structure. The investigation is presented in two main sections, the first of which presents a formulation of the matrix eigenvalue problem for small oscillations. The development of the stiffness matrix is presented in …
-
Design and analysis of a hybrid steel/composite pipe for high-pressure applications
… Today's petroleum industry is requiring piping systems to sustain high pressures, impact, rugged handling, and harsh environmental conditions such as corrosion and temperature. Advances in the last decade of engineered materials have opened the way for more conversions from metal to …
-
Automated segmentation, detection and fitting of piping elements from terrestrial LIDAR data
… surveying of urban sites with terrestrial LIDAR systems. Static terrestrial LIDAR has become an especially effective tool for surveying, in some cases replacing traditional techniques such as electronic total stations and GPS methods. Current state-of-the-art LIDAR scanners have very fine spatial …
-
An Evaluation and Pressure-Driven Design of Potable Water Plumbing Systems
Potable water distribution systems are broken into major and minor distribution networks. Major water distribution networks refer to large-scale municipal pipe systems extending from the treatment plant to the upstream node of the water service line for buildings. Minor water distribution systems, …
-
Modeling transient flow in intermittent water supply System
Water distribution systems in cities throughout South Asia (and many other countries) only supply water on an intermittent basis (currently averaging less than 5hrs/day in most Indian cities). Intermittent Water Supply (IWS) creates inequities in water availability and carries public health risks …
Page 1 of 2