Searched for: subject%3A%22structural%255C+monitoring%22
(1 - 14 of 14)
document
Hageman, R.B. (author), van der Meulen, F.H. (author), Rouhan, A. (author), Kaminski, M.L. (author)
In order to obtain valuable information from an Hull Structure Monitoring system, a large data set and consistent analysis of that data is required. The monitoring requires significant efforts over multiple years and as a result, uncertainties obtained from in-service measurements are rarely published. Instead, researchers have to rely on...
journal article 2022
document
Petersen, W. (author), Øiseth, O. (author), Lourens, E. (author)
Wind loading is an essential aspect in the design and assessment of long-span bridges, but it is often not well-known and cannot be measured directly. Most structural health monitoring systems can easily measure structural responses at discrete locations using accelerometers. This data can be combined with reduced-order modal models in Kalman...
journal article 2022
document
Stambaugh, K.A. (author)
Ships must perform their missions with a high degree of reliability to maximize availability through their service life. The ultimate safety of the hull structure is time-dependent with degradation caused by the operational environment. Achieving the fore mentioned reliability and mission availability requirements are complicated because ships...
doctoral thesis 2020
document
Petersen, W. (author), Øiseth, O. (author), Lourens, E. (author)
The traditional wind load assessment for long-span bridges relies on assumed models for the wind field and aerodynamic coefficients from wind tunnel tests, which usually introduce some uncertainties. Recent studies have shown that large deviations can exist between the predicted and observed wind-induced dynamic response of suspension bridges...
journal article 2020
document
Petersen, Øyvind Wiig (author), Øiseth, Ole (author), Lourens, E. (author)
The dynamic behaviour of long-span bridges is governed by stochastic loads from typically ambient excitation sources. In real life, these loads cannot be measured directly at full scale. However, inverse methods can be utilised to identify these unknown forces using response measurements together with a numerical model of the relevant...
journal article 2019
document
Petersen, Oyvind W. (author), Øiseth, Ole (author), Nord, Torodd Skjerve (author), Lourens, E. (author)
The traditional wind load assessment for long-span bridges rely on assumed models for the wind field and aerodynamic coefficients from wind tunnel tests, which usually introduces some uncertainties. It is therefore desired to develop tools that can utilize full-scale vibration response data from existing bridges in order to study the wind...
conference paper 2019
document
Petersen, Oyvind W. (author), Øiseth, Ole (author), Nord, Torodd S. (author), Lourens, E. (author)
Numerical predictions of the dynamic response of complex structures are often uncertain due to uncertainties inherited from the assumed load effects. Inverse methods can estimate the true dynamic response of a structure through system inversion, combining measured acceleration data with a system model. This article presents a case study of...
journal article 2018
document
Petersen, Øyvind Wiig (author), Oiseth, Ole (author), Lourens, E. (author)
Structural health monitoring (SHM) seeks to assess the condition or behaviour of the structure from measurement data, which for long-span bridges typically are wind velocities and/or structural vibrations. However, in the assessment of the wind-induced response effects, models for the actual loads must be adopted, which introduces uncertainties....
journal article 2018
document
Tatsis, K. (author), Chatzi, Efi (author), Thons, S. (author), Lourens, E. (author)
The evaluation of fatigue damage accumulation on wind turbine support structures under operational conditions is heavily influenced by a number of uncertainties. These uncertainties may, firstly, be attributed to the highly variable and complex environmental loads, and secondly, to the unavoidable modelling errors which mainly originate from the...
conference paper 2017
document
Petersen, Øyvind Wiig (author), Øiseth, Ole (author), Lourens, E. (author)
Suspension bridges with very long spans and slender designs are susceptible to large-amplitude dynamic excitation. Monitoring systems installed on bridges can provide measurement data (e.g. accelerations) and therewith valuable information on the true dynamic behaviour. This pilot study examines the possible use of recently developed methods...
conference paper 2017
document
Groeneboom, B. (author)
AE-based structural integrity monitoring of composite structures potentially offers the means to gain knowledge on in-service damage accumulation, as well as mitigation of some of the risks associated with in-service damage. However, validation of any identified classes of AE events with regard to their underlying source mechanics is generally...
master thesis 2016
document
Fallais, D.J.M. (author), Voormeeren, S.N. (author), Lourens, E. (author)
For reliable structural health monitoring and possible lifetime extension of offshore wind turbine support structures, accurate predictions of the response of these structures at all critical locations are required. Response predictions in offshore wind applications are, however, affected by large uncertainties on environmental (wind/wave...
journal article 2016
document
Stambaugh, K. (author), Drummen, I. (author), Cleary, C. (author), Sheinberg, R. (author), Kaminski, M.L. (author)
This paper presents an overview of the US Coast Guard’s Fatigue Life Assessment Project (FLAP) and the application of the results in hull structure lifecycle management of the National Security Cutter class. One of the key measurements of the FLAP instrumentation included a radar based wave data measuring system. These measurements were used to...
conference paper 2014
document
Van der Cammen, J.J. (author)
The fatigue life of structural members is an important aspect in the hull design of a Floating Production Storage and Offloading unit (FPSO). In contrast to the design for ultimate conditions, a fatigue assessment requires a thorough knowledge of the long-term environment to which the unit is exposed and how the unit is operated to estimate an...
doctoral thesis 2008
Searched for: subject%3A%22structural%255C+monitoring%22
(1 - 14 of 14)