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Spruit, R. (author), Hopman, V. (author), Van Tol, A.F. (author), Broere, W. (author)Recent incidents with leaking diaphragm walls during construction of subway lines in Amsterdam and Rotterdam (Netherlands) have led to reconsideration of the diaphragm wall as a retaining wall construction for deep excavations. In our opinion the joints between the panels are the weak spot. During concrete pouring the concrete should replace the...conference paper 2011
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- DeNucci, T.W. (author), Hopman, J.J. (author) conference paper 2010
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- Andrews, D.J. (author), Duchateau, E.A.E. (author), Gillespe, J.W. (author), Hopman, J.J. (author), Pawling, R.G. (author), Singer, D.J. (author) conference paper 2012
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Van Bruinessen, T.M. (author), Hopman, J.J. (author), Smulders, F.E.H.M. (author)The European Maritime cluster remains a very important player in the design, production and operation of Complex Specials, but under pressure of competitors in the Far East both the design and the design approach has to 5e improved to maintain its maricet position. The problem of any new method is that it should comply with boundary conditions...conference paper 2012
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- vand Oers, B.J. (author), Hopman, J.J. (author) conference paper 2007
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Van Bruinessen, T.M. (author), Smulders, F.E.H.M. (author), Hopman, J.J. (author)The research this paper reports on aims to develop a design and engineering strategy for complex ships in between incremental and radical innovation. The majority of European ship-design industry concentrates on the development of complex, one-off ‘specials’ for the offshore industry, like dredgers, drill ships, pipelaying ships, et cetera. This...conference paper 2013
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- Hopman, J.J. (author) conference paper 2014
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- Wang, C. (author), Hopman, J.J. (author) conference paper 2012
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- Hopman, J.J. (author) conference paper 2008
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Hopman, V. (author), Hölscher, P. (author)A test field with 20 cast in-situ piles has been built. Flaws (necks, bulges and cracks) are built in. Existing and newly developed detecting methods have been tested. They show interpretable signals and also some challenges to improve the results. The final phase e.g. excavation of a representative number of piles will lead to final conclusions...conference paper 2015
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Li, Z. (author), Jiang, X. (author), Hopman, J.J. (author)Fatigue is one of the major challenges of offshore rigid pipes. The surface crack is the main manifestation. Fatigue cracks are evolved from surface cracks which are frequently appear in the external surface of rigid pipes. Under fatigue loads, the surface cracks may continue to propagate and finally develop into penetrated cracks, which may...conference paper 2018
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- Li, X. (author), Jiang, X. (author), Hopman, J.J. (author) conference paper 2018
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Charisi, N.D. (author), Hopman, J.J. (author), Kana, A.A. (author), Papapanagiotou, Nikos (author), Muller, Thijs (author)This paper proposes a parametric modelling method based on Knowledge Based Engineering (KBE) for an LNG bunkering vessel (LNGBV). Parametric models aim to define the geometry and main systems configuration of the vessel starting from the principle that the vessel should be able to perform its mission successfully. The adoption of KBE in...conference paper 2020
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van Veldhuizen, B.N. (author), van Biert, L. (author), Visser, K. (author), Hopman, J.J. (author)To continue its operations, the marine industry needs to comply with emission regulations. Solid Oxide Fuel Cells (SOFCs) are considered a promising solution, since it can generate energy athigh efficiency and low NOX, SOX and particulate matter emissions. Another advantage of SOFCsis fuel flexibility, meaning several fuels can be applied in...conference paper 2022
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Charisi, N.D. (author), Kana, A.A. (author), Hopman, J.J. (author)The aim of this paper is to discuss the challenges associated with the early-stage design of novel and reliable vessels, and discuss some of the expected benefits of the application of multi-fidelity models in addressing some of their early-stage design problems. Traditionally, early-stage design tools are computationally cheap, but lack in...conference paper 2022
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Huijgens, L.J.G. (author), Vrijdag, A. (author), Hopman, J.J. (author)Regulatory demands on ship designs, such as emission and manoeuvrability requirements, are becoming increasingly stringent, raising the need for advanced methods to predict and assess dynamic propulsion plant behaviour of a new design. At present, model scale experiments and numerical simulations are not able to predict this behaviour in full...conference paper 2018
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van der Beek, T. (author), van Essen, J.T. (author), Pruyn, J.F.J. (author), Aardal, K.I. (author), Hopman, J.J. (author)The primary drivers for buying a ship from a certain yard are price, delivery time and quality. In order to decrease construction time and costs, shipbuilding companies are exploring the development of product-families to include family wide modularity and cross family standardization. Standardization is the use of identical components across...conference paper 2019
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Li, X. (author), Jiang, X. (author), Hopman, J.J. (author)A flexible riser is a flexible pipe that transports materials between seafloor and topside structures. As oil and gas production heads to water depths greater than 3000 meters, huge hydrostatic pressure may cause the collapse failure of flexible risers. Generally, the collapse strength of a flexible riser is designed by considering the effects...conference paper 2019
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- Hopman, J.J. (author) journal article 2008
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Jacobs, M.M.J. (author), Hopman, P.C. (author), Molenaar, A.A.A. (author)The crack growth mechanism in asphalt concrete (Ac) mixes is studied. In cyclic tests on several asphaltic mixes crack growth is measured, both with crack foils and with cOD-gauges. It is found that crack growth in asphaltic mixes is described by three processes which are parallel in time: cohesive crack growth in the mortar, adhesive crack...journal article 1995