Nonlinear dynamic response of a multi-degree of freedom gear system dynamic model coupled with tooth surface characters: a case study on coal cutters

A kind of constitutive model of SMA is proposed in this paper, and the nonlinear dynamic response of a SMA gripper under bounded noise is studied. The harmonic driving signals and the random disturbance made up of bounded noise. The dynamic model of the system is established by Hamilton principle. The numerical and experimental results show that there is stochastic resonance in the system; the system’s vibration amplitude reaches the most when the outside excitation is moderate.

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Nonlinear Dynamic Response of Cylindrical Roller Bearing–Rotor System with 9 Degree of Freedom Model Having a Combined Localized Defect at Inner–Outer Races of Bearing

Tribology Transactions ◽

10.1080/10402004.2016.1163759 ◽

2016 ◽

Vol 60 (2) ◽

pp. 284-299 ◽

Cited By ~ 9

Author(s):

Utkarsh Kumar A. Patel ◽

S. H. Upadhyay

Keyword(s):

Dynamic Response ◽

Nonlinear Dynamic ◽

Roller Bearing ◽

Rotor System ◽

Degree Of Freedom ◽

Nonlinear Dynamic Response ◽

Cylindrical Roller Bearing ◽

Cylindrical Roller

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System Dynamic Model for the Accumulation of Renewable Electricity using Power-to-Gas and Power-to-Liquid Concepts

Environmental and Climate Technologies ◽

10.1515/rtuect-2015-0012 ◽

2015 ◽

Vol 16 (1) ◽

pp. 54-68 ◽

Cited By ~ 9

Author(s):

Andra Blumberga ◽

Lelde Timma ◽

Dagnija Blumberga

Keyword(s):

Renewable Energy ◽

System Dynamics ◽

Dynamic Model ◽

System Dynamic ◽

System Dynamic Model ◽

Conceptual System ◽

Renewable Energy Resources ◽

Power To Gas ◽

Internal And External Factors

Abstract When the renewable energy is used, the challenge is match the supply of intermittent energy with the demand for energy therefore the energy storage solutions should be used. This paper is dedicated to hydrogen accumulation from wind sources. The case study investigates the conceptual system that uses intermitted renewable energy resources to produce hydrogen (power-to-gas concept) and fuel (power-to-liquid concept). For this specific case study hydrogen is produced from surplus electricity generated by wind power plant trough electrolysis process and fuel is obtained by upgrading biogas to biomethane using hydrogen. System dynamic model is created for this conceptual system. The developed system dynamics model has been used to simulate 2 different scenarios. The results show that in both scenarios the point at which the all electricity needs of Latvia are covered is obtained. Moreover, the methodology of system dynamics used in this paper is white-box model that allows to apply the developed model to other case studies and/or to modify model based on the newest data. The developed model can be used for both scientific research and policy makers to better understand the dynamic relation within the system and the response of system to changes in both internal and external factors.

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SIM4NEXUS – Coupling a System Dynamic Model with Serious Gaming for Policy Analysis

10.29007/w5vl ◽

2018 ◽

Author(s):

Barry Evans ◽

Lydia Vamvakeridou-Lyroudia ◽

Janez Susnik ◽

Antonio Trabucco ◽

Simone Mereu ◽

...

Keyword(s):

Climate Change ◽

Dynamic Model ◽

System Dynamic ◽

Coherent System ◽

System Dynamic Model ◽

Proof Of Concept ◽

Local Stakeholders ◽

Long Term Impact

Water, land, food, energy, and climate are all interconnected, comprising a coherent system (the ‘Nexus’), dominated by complexity and feedback. The interactions between these different nexus components and their responses to climate change conditions are complicated as each feedback into the other. Consequently future policies should take into account the whole Nexus, when it comes to ascertain their long term impact on the system. This paper presents the conception of a System Dynamic Model (SDM) representing the Nexus, populating it with data from various sources (including output from specific thematic models covering different Nexus components), under different climate change and socioeconomic pathway scenarios. The SDM is then converted into R scripting to be included in the Knowledge Elicitation Engine (KEE) communicating with a Serious Game (SG). Models and games are built specifically for ten Case Studies, at regional, national, continental and global level. The SG is being developed for decision making for local stakeholders to study and get acquainted to long term impacts of different policies on the Nexus. In this paper the regional Case Study of Sardinia is presented as proof of concept.

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