document

Pin-pin resonance as a reference in determining ballasted railway track vibration behaviour

De Man, A.P. (author)

Pin-pin resonance is one of the most significant preferred vibration modes of beams, which are supported at equal distances, such as rails at sleepers in railway track structures do. Pin-pin resonance is a vibration that appears in one basic (first) mode and several higher modes, however the basic mode will have the highest amplitudes. In...

journal article 2000

document

Optimization of an embedded rail structure using a numerical technique

Markine, V.L. (author), De Man, A.P. (author), Esveld, C. (author)

This paper presents several steps of a procedure for design of a railway track aiming at the development of optimal track structures under various predefined service and environmental conditions. The structural behavior of the track is analyzed using a finite element model in which the track and a moving train are incorporated. Parameters of the...

journal article 2000

document

Agent-oriented modeling of the dynamics of biological organisms

Jonker, C.M. (author), Treur, J. (author)

journal article 2007

document

Platform competition processes: A future research outlook

Papachristos, G. (author), van de Kaa, G. (author)

Platform competition for market share can have broad ranging implications within or across industry sectors. It is subject to the complex and changing socioeconomic context in which it unfolds. Three trends provide evidence for this: (i) the number of relevant factors for platform market dominance is steadily increasing, (ii) industries...

conference paper 2016

document

Reducing the energy consumption of robots using the bidirectional clutched parallel elastic actuator

Plooij, M.C. (author), Wisse, M. (author), Vallery, H. (author)

Parallel elastic actuators (PEAs) have shown the ability to reduce the energy consumption of robots. However, regular PEAs do not allow us to freely choose at which instant or configuration to store or release energy. This paper introduces the concept and design of the bidirectional clutched parallel elastic actuator (BIC-PEA), which reduces...

journal article 2016

document

Coordination of industrial symbiosis through anchoring

Sun, Li (author), Spekkink, Wouter (author), Cuppen, E.H.W.J. (author), Korevaar, G. (author)

This paper aims to contribute to understanding the dynamics of industrial symbiosis. More specifically, we focus on the dynamics of anchoring as they can be observed in the Chinese context of eco-industrial development. We define anchoring as those activities that (typically local) actors perform to create local physical and institutional...

journal article 2017

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Isolating the location of scour-induced stiffness loss in bridges using local modal behaviour

Prendergast, L.J. (author), Gavin, Kenneth (author), Hester, David (author)

Detecting scour by analysing bridge vibrations is receiving an increasing amount of attention in the literature. Others have considered changes in natural frequency to indicate the presence of scour damage; however, little work has been reported on identifying the location of a scour hole based on vibration measurements. In this paper, a...

journal article 2017

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Time Evolution of Estuarine Turbidity Maxima in Well-Mixed, Tidally Dominated Estuaries: The Role of Availability- and Erosion-Limited Conditions

Brouwer, R.L. (author), Schramkowski, G.P. (author), Dijkstra, Y.M. (author), Schuttelaars, H.M. (author)

Using an idealized width-averaged process-based model, the role of a mud pool on the bed and time-varying river discharge on the trapping of fine sediment is systematically investigated. For this purpose, a dynamically and physically motivated description of erodibility is presented, which relates the amount of sediment on the bed to the...

journal article 2018

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An iterative method to infer distributed mass and stiffness profiles for use in reference dynamic beam-Winkler models of foundation piles from frequency response functions

Wu, W. H. (author), Prendergast, L.J. (author), Gavin, Kenneth (author)

Accurate characterisation of soil behaviour in Dynamic-Soil-Structure Interaction (DSSI) applications remains a significant challenge. Knowledge of the operational soil-structure interaction stiffness is important for applications ranging from earthquake engineering to offshore structures subjected to wind and wave loading. A number of...

journal article 2018

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Multivariate simulation modelling for adaptive long-term infrastructure planning

Havelaar, M. (author), Jaspers, W. (author), van Nederveen, G.A. (author), Auping, Willem L. (author), Wolfert, A.R.M. (author)

Infrastructure asset managers are challenged by rapid changes around the world such as urbanisation and climate change. They have to deal with multiple complex and dynamic infrastructure systems that can influence each other and that can be influenced by various uncertain factors. Traditional planning methods are not well suited to complex and...

journal article 2019

document

Experimental application of FRF-based model updating approach to estimate soil mass and stiffness mobilised under pile impact tests

Prendergast, L. J. (author), Wu, W. H. (author), Gavin, Kenneth (author)

The dynamic response of structures in contact with soil is receiving increasing interest and there is a growing need for more accurate models capable of simulating the behaviour of these systems. This is particularly important in the field of offshore wind turbines, where accurate estimates of system frequency are needed to avoid resonance, and...

journal article 2019

document

Capturing dynamics in business model frameworks

Khodaei, H. (author), Ortt, J.R. (author)

Business model dynamics is important, because high-tech companies, the technology that they commercialize, and the market in which they operate all change over time. We build on the dynamic capability view of the firm to explain business model evolution and innovation, looking particularly at the dynamics that are created by interactions...

journal article 2019

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Experimental setup for dynamic analysis of microand nano-mechanical systems in vacuum, gas, and liquid

van den Brink, Bram (author), Alijani, F. (author), Ghatkesar, M.K. (author)

An experimental setup to perform dynamic analysis of a micro- and nano-mechanical system in vacuum, gas, and liquid is presented. The setup mainly consists of a piezoelectric excitation part and the chamber that can be either evacuated for vacuum, or filled with gas or water. The design of the piezoelectric actuator was based on a Langevin...

journal article 2019

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Input of advanced geotechnical modelling to the design of offshore wind turbine foundations (Apport de la modélisation géotechnique avancée au dimensionnement de fondations d’éoliennes offshore)

Pisano, F. (author)

The offshore wind sector is skyrocketing worldwide, with a clear trend towards wind farms installed in increasingly deep waters and harsh marine environments. This is posing significant engineering challenges, including those regarding the design of support structures and foundations for offshore wind turbines (OWTs). Substantial research...

conference paper 2019

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Institutional lens upon industrial symbiosis dynamics: The case of Persian gulf mining and metal industries special economic zone

Noori, S. (author), Korevaar, G. (author), Ramirez, Andrea (author)

Industrial Symbiosis (IS) is a collaboration between nearby industrial plants to exchange waste material and energy and achieve economic and environmental benefits that cannot be obtained individually. IS emergence in a cluster requires both technical potentials for material and energy exchange and social readiness for collaboration. In this...

journal article 2020

document

Dynamic behaviour of adobe bricks in compression: The role of fibres and water content at various loading rates

li Piani, T. (author), Weerheijm, J. (author), Peroni, M. (author), Koene, L. (author), Krabbenborg, D. (author), Solomos, G. (author), Sluys, Lambertus J. (author)

This paper presents the results of an experimental research aimed at assessing the material performance of adobe bricks in compression for a wide range of induced strain rates, from statics to high velocity impact. Adobe connotes a traditional masonry whose bricks are made of sundried soil mixtures possibly reinforced with natural fibres and...

journal article 2020

document

Crafted vs. Learned Representations in Predictive Models - A Case Study on Cyclist Path Prediction

Pool, E.A.I. (author), Kooij, J.F.P. (author), Gavrila, D. (author)

This paper compares two models for context-based path prediction of objects with switching dynamics: a Dynamic Bayesian Network (DBN) and a Recurrent Neural Network (RNN). These models are instances of two larger model categories, distinguished by whether expert knowledge is explicitly crafted into the state representation (and thus is...

journal article 2021

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The Dynamic Business Model Framework—Illustrated with Renewable Energy Company Cases from Indonesia

Kamp, L.M. (author), Meslin, T.A.J. (author), Khodaei, H. (author), Ortt, J.R. (author)

It is important for companies to be able to make their business models dynamic. This enables them to adapt to changing circumstances and remain viable. The aim of this paper is to combine insights from the literature on business models and business model dynamics into a comprehensive dynamic business model framework. The framework that is...

journal article 2021

document

Robustifying dynamic positioning of crane vessels for heavy lifting operation

Ye, J. (author), Roy, Spandan (author), Godjevac, Milinko (author), Reppa, V. (author), Baldi, S. (author)

Construction crane vessels make use of dynamic positioning (DP) systems during the installation and removal of offshore structures to maintain the vessel's position. Studies have reported cases of instability of DP systems during offshore operation caused by uncertainties, such as mooring forces. DP “robustification” for heavy lift operations...

journal article 2021

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Learning Interaction-Aware Trajectory Predictions for Decentralized Multi-Robot Motion Planning in Dynamic Environments

Zhu, H. (author), Martinez Claramunt, Francisco (author), Ferreira de Brito, B.F. (author), Alonso-Mora, J. (author)

This paper presents a data-driven decentralized trajectory optimization approach for multi-robot motion planning in dynamic environments. When navigating in a shared space, each robot needs accurate motion predictions of neighboring robots to achieve predictive collision avoidance. These motion predictions can be obtained among robots by...

journal article 2021