... analysis to predict the vibration response. Numerical simulations for high L/D bare riser response show that the method provides a good estimation of VIV responses in both in-line and crossflow directions by comparing numerical results against available field data. riser displacement accelerometer...

..., the common approach was to operate the pump until failure, with limited monitoring technologies. Over the last years, subsea pumps have been supplied with accelerometers located outside the 2 OTC-28736-MS pump casing. Applying sensors outside a compact casing has limitations in getting the full picture...

..., decisioning platforms that monitor, assess and make recommendations, like RLMS for UDW equipment, are critical to manage risk. Unlike conventional techniques such as strain gauges for direct strain/stress measurement, the RLMS measures the vibrations of the riser string using accelerometers at selected joints...

... as a benchmark for analytical model calibration activities, reducing the known conservatism in stress and fatigue in future deployments. fatigue damage fatigue resistance accelerometer damage rate upstream oil & gas vibration svdl frequency prediction offshore technology conference wellhead...

... of the risers to be able to interrogate the infield performance of the risers against the software predictions made during design. Ten accelerometers were placed at critical locations on the riser as described later in the paper. These are ROV retrievable packages attached to the locations as shown in Figure 1...

... & gas conclusion wellhead fatigue wellhead fatigue damage otc 23981 frequency accelerometer analytical prediction operation offshore technology conference curvature OTC 23981 Evaluation of Wellhead Fatigue Using In-Service Structural Monitoring Data Phil Ward, Alex Rimmer and Hugh Howells...

.... The reflection seismic survey trials conducted in the Nankai Trough sea area confirmed the the high quality records that can be obtained with the system. Following the same design concept, we improved the RSCS receiver by reducing its size to 2/3, adopting accelerometers and a hydrophone. The new system...

..., accelerometer outputs from the turbine's condition monitoring systems and bathymetry survey data. MMI modeled the structures using fully-coupled, nonlinear finite element software and then calibrated the analysis results using observed data to give increased confidence in model accuracy. The results from...

... measurements from accelerometers and angular rate sensors inside Subsea Vibration Data Logger (SVDL) modules installed at strategic locations along the riser length. This method is preferred to resistive or fiber optic strain gauges due to the measurement quality and reliability concerns associated...

... moreaccurate inspection; significantly improves construction practices and quality/ reliability; reduces risks to high value assets; and provides rapid access tosharable survey-quality as-built data before, during and afterconstruction. imaging laser sensor accelerometer signal level offshore...

... of installed measuring devices and on important issues in processing of the recorded data. Measurement of floater kinematics is based on accelerometers, angular rate sensors, and the Differential Global Positioning System (DGPS). Careful understanding of the characteristics of each instrument is essential...

..., for permanent installations, has been developed and pilot test data from the system have been acquired and subject to analysis. The cable system contains high reliability fibre optic three- axis (3C) accelerometers and hydrophones, fiber Bragg grating (FBG) based sensor network and an electro-optic...

... was recorded with twenty four evenly spaced internal tri-axial accelerometers. Observed reduced velocity and RMS displacement response levels are reported. Mean drag coefficients and hydrodynamic damping derived from measured data are compared to calculated values from formulas commonly used in engineering...

... pipe displacement response displacement test configuration upstream oil & gas roughness diameter otc 16183 suppression riser test data offshore technology conference calibration accelerometer frequency prediction cylinder vibration frequency reynolds number Copyright...

... made of fiberglass composite, consisted of five joints connected by inner sleeves, and were mounted horizontally beneath a towing bridge. Accelerometers and load cells were used to monitor the accelerations, tension and drag loads. As the bridge rotates, it drives the cylinder in a circular path...

... to 1.9 m/s. Cross flow acceleration was measured using nine accelerometers. The position of the accelerometers is given in Fig.1. The signals were sampled at 200 Hz, and were low pass filtered at 80 Hz. A typical spectrum calculated from a measured accelerometer signal is shown in Fig.3 The Relationships...

.... Table 2 lists the weights associated with each piece of hardware used during the tests. Note that only the test cylinders, foam assembly, sleeves (four per cylinder assembly), end caps, accelerometer holders (see below), and about 6 inches of cable (at each end) constitute the weights that comprise...

... artificial intelligence sensor resolution measurement system xviii clamp displacement riser upstream oil & gas otc 13247 subsea viv measurement system tilt accelerometer computer software acoustically acoustic modem vismu deployment pendulum Copyright 2001, Offshore...

... to a combination of uniform current and waves. The riser model was made from sections of commercial rubber hose and 10 aluminium intersections specially designed to house accelerometers. The riser was ballasted with lead to obtain the correct weight, and filled with gelatine to avoid unwanted vibrations...

... realisticenvironmental conditions. The work was carried out in three phases. otc 11996 viv response accelerometer helland hansen upstream oil & gas artificial intelligence offshore technology conference vortex-induced vibration riser prediction current velocity current profile riser response...