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Posted in 2014

Published a new course: Advanced Design and Optimization of Composite Structures I

today a new course has been published: Advanced Design and Optimization of Composite Structures I, a master course of Aerospace Engineering

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This course introduces the basic components of an airframe structure and discusses their use and limitations. The realities of composite design such as the effect of material scatter, environmental knockdowns, and damage knockdowns are discussed and guidelines accounting for these effects and leading to robust designs are presented. The resulting design constraints and predictive tools are applied to real-life design problems in composite structures. A brief revision of lamination theory and failure criteria leads into the development of analytical solutions for typical failure modes for monolithic skins (layup strength, buckling under combined loads and for a variety of boundary conditions) and stiffeners (strength, column buckling under a variety of loads and boundary conditions, local buckling or crippling for one-edge and no-edge-free conditions). These are then combined into stiffened composite structures where additional failure modes such as skin-stiffener separation are considered. Analogous treatment of sandwich skins examines buckling, wrinkling, crimping, intra-cellular buckling failure modes. Once the basic analysis and design techniques have been presented, typical designs (e.g. flange layup, stiffness, taper requirements) are presented and a series of design guidelines (stiffness mismatch minimization, symmetric and balanced layups, 10% rule, etc.) addressing layup and geometry are discussed. On the metal side, the corresponding design practices and analysis methods are presented for the more important failure modes (buckling, crippling) and comparisons to composite designs are made. A design problem is given in the end as an application of the material in this part of the course.

een nieuwe bachelor cursus: Lineaire Algebra 1 gepubliceerd

Deze week een nieuwe cursus: Lineaire Algebra 1 gepubliceerd, een bachelor cursus Technisch Wiskunde: http://bit.ly/1runBJ9

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Vakinhoud

Leren rekenen met vectoren en matrices.
De methode van rijreductie voor het oplossen van lineaire systemen.
De begrippen lineair onafhankelijk, span en basis
Elementaire lineaire transformaties, de begrippen surjectief en injectief.
De begrippen deelruimte, basis en dimensie en voorbeelden hiervan.
Eigenwaardes en eigenvectoren van een matrix.
Dit vak is een combinatie van de vakken Lineaire Algebra 1 en Lineaire Algebra 2 die bij andere TU-opleidingen aangeboden worden.

Leerdoelen

Het kennen van basisbegrippen, het gebruik van basismethodes.
Het maken van logische afleidingen met behulp van deze begrippen en methodes

Een nieuw module toegevoegd aan de Delftse Leerlijn voor Scheikunde: Evenwichten en het methanolproces

Er is een nieuw module toegevoegd aan de Delftse Leerlijn voor Scheikunde, Evenwichten en het methanolproces: http://bit.ly/1sbeTyd. Dit is module 7 van de Delftse Leerlijn voor Scheikunde voor vwo leerlingen.

evenwichten

 

Uitgangspunten van de Leerlijn:
Leerlingen zullen aan de hand van maatschappelijke-, chemische- en technologische vraagstukken concepten leren om een antwoord op deze vraagstukken te geven op grond van chemische argumenten. Er wordt ingestoken op nieuwe materialen, duurzaamheid, innovatieve technologie en de chemische industrie.
Deze module behandelt:

Evenwichten bij de productie van methanol
Onderzoek naar: De meest groene en duurzame methode om methanol te produceren.

Concepten
Reactiesnelheid, reactie-energie, activeringsenergie, energiediagrammen, botsende-deeltjes model, snelheidsbepalende stap, evenwichten, evenwichtsvoorwaarde, evenwichtsconstante, beïnvloeden van een evenwicht.

Activiteiten
Rekenen aan evenwichtsreacties
Beïnvloeden van evenwichtsreacties met Excelprogramma
Rekenen aan een methanolproductieproces
Betoog schrijven over een groene en duurzame methanolproductie

a new course published: New Generation Infrastructures part 1

A new course Next Generation Infrastructures part 1 has been published, the course is a former MOOC from the faculty Technology, Policy and Management:  http://bit.ly/Z4ad2i

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Infrastructures for energy, water, transport, information and communications services create the conditions for livability and economic development. They are the backbone of our society. Similar to our arteries and neural systems that sustain our human bodies, most people however take infrastructures for granted. That is, until they break down or service levels go down.

In many countries around the globe infrastructures are ageing. They require substantial investments to meet the challenges of increasing population, urbanization, resource scarcity, congestion, pollution, and so on. Infrastructures are vulnerable to extreme weather events, and therewith to climate change.
Technological innovations, such as new technologies to harvest renewable energy, are one part of the solution. The other part comes from infrastructure restructuring. Market design and regulation, for example, have a high impact on the functioning and performance of infrastructures.

This course will help you to understand the complexity of infrastructure systems. Complexity is one of key words of this course and we will describe the tremendous implications for the design and governance of infrastructure systems. Part II of the MOOC NGI (September/Otober 2014) will have a more applied nature: the focus will be on smart, secure and sustainable infrastructures ( smart grids, eco cities, ICT/big data &performance of infrastructures and asset management).

The MOOC: Next Generation Infrastructures – Part 2 will start 21 September 2014

Een bachelor cursus TBM gepubliceerd: introductie in energie- en industriesystemen

Deze week een nieuwe bachelor cursus van TBM gepubliceerd: introductie in energie- en industriesystemen.

Electric power lines

Vakinhoud
Introductie van de structuur en het gedrag van de massa- en energienetwerken die de ruggengraat vormen van de economie. De belangrijkste energie- en industriesystemen worden vanuit verschillende perspectieven besproken.

• Kaartkennis van energie- & industriesystemen, met name in Nederland
• Voorraden en stromen, elektriciteitsinfrastructuur, elektriciteitstransport, aardgasinfrastructuur, drink- en afvalwater, industrie, warmte- en CO2-netwerken, toekomstige energie- & industriesystemen
• Vraag- en aanbodfluctuaties, balanshandhaving
Leerdoelen
• De behoudswetten van massa en energie te reproduceren en een stationaire massa- of energiebalans op te stellen
• Energie- & industriesystemen te beschrijven en ontleden in functionele eenheden, hiërarchische niveaus en netwerken
• Eenvoudige analyses van energie- & industriesystemen op te zetten en uit te voeren
• Interacties en afhankelijkheden tussen energie- & industriesystemen met verschillende tijdconstanten te beschrijven
• De kritische functies in energie- & industriesystemen voor de economie en de natuurlijke omgeving te beschrijven

 

Published a new master course: Mechatronic System Design

Last week a new master course of Mechanical Engineering has been published: Mechatronic System Design.

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Course Contents

Mechatronic system design deals with the design of controlled motion systems by the integration of functional elements from a multitude of disciplines. It starts with thinking how the required function can be realised by the combination of different subsystems according to a Systems Engineering approach (V-model).

Some supporting disciplines, like power-electronics and electromechanics, are not part of the BSc program of mechanical engineers. For this reason this course introduces these disciplines in connection with PID-motion control principles to realise an optimally designed motion system.
The target application for the lectures are motion systems that combine high speed movements with extreme precision.
The course covers the following four main subjects:

Dynamics of motion systems in the time and frequency domain, including analytical frequency transfer functions that are represented in Bode and Nyquist plots.
Motion control with PID-feedback and model-based feedforward control-principles that effectively deal with the mechanical dynamic anomalies of the plant.
Electromechanical actuators, mainly based on the electromagnetic Lorentz principle. Reluctance force and piezoelectric actuators will be shortly presented to complete the overview.
Power electronics that are used for driving electromagnetic actuators.
The fifth relevant discipline, position measurement systems is dealt with in another course: WB2303, Electronics and measurement.
The most important educational element that will be addressed is the necessary knowledge of the physical phenomena that act on motion systems, to be able to critically judge results obtained with simulation software.
The lectures challenge the capability of students to match simulation models with reality, to translate a real system into a sufficiently simplified dynamic model and use the derived dynamic properties to design a suitable, practically realiseable controller.
This course increases the understanding what a position control system does in reality in terms of virtual mechanical properties like stiffness and damping that are added to the mechanical plant by a closed loop feedback controller.

It is shown how a motion system can be analysed and modelled top-down with approximating (scalar) calculations by hand, giving a sufficient feel of the problem to make valuable concept design decisions in an early stage.
With this method students learn to work more efficiently by starting their design with a quick and dirty global analysis to prove feasibility or direct further detailed modelling in specific problem areas.

 

a new course in OpenCourseWare: Advanced Structural Analysis

Last week a new course of the Master Aerospace Engineering has been published: Advanced Structural Analysis

strucanal

Course Description

  • Computation of structural deflections for thin-walled structures – continuation. (Applying the Dummy Unit Load Method, computation of relative displacements).
  • Analysis of Statically Indeterminate Structures. (External vs internal redundancies, multiple redundancies, applications to wing and fuselage structures).
  • Engineering theory of bending for open and closed tubes’ an overview. (General stress, strain and displacement relationships for open and closed tubes).
  • Shear flow in open and closed tubes.
  • Twist and warping of shear loaded closed tubes.
  • Displacements associated with the Bredt-Batho shear flow.
  • Warping distribution of a doubly symmetrical rectangular closed tube subjected to a torque.
  • Warping of open tubes.
  • Axial constraint stresses in open tubes. (The Wagner torsion-bending theory, calculation of the torsion bending constant, the wire analogy for flat sided sections).
  • Axial constraint stresses in closed tubes. (Doubly symmetrical single cell, 4-boom tube under torsion).
  • Shear diffusion. (Axial constraint stresses in a doubly symmetrical single cell 6 stringer tube subjected to a transverse shear force).
  • Elements of plate bending theory. (Kirchhoff’s assumptions, equilibrium equations via the stationary value of the potential energy, Kirchhoff”s derivation of the boundary conditions, simply supported rectangular plate under sinusoidal loading, Navier’s solution for simply supported rectangular plates, the Green’s function of the rectangular plate).

Study Goals
This course is designed to introduce students who wish to specialize in stress analysis of thin-walled structures to more
advanced topics such as the analysis of statically indeterminate structures, warping, constraint stresses, shear diffusion, and
elements of plate bending.

 

a new course in OpenCourseWare: Urban Drainage and Watermanagement

Last week a new course Urban Drainage and Watermanagement has been published. A course from the master Watermanagement.

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In a series of lectures urban planners and other experts will explain on urban tasks and (recently)
built urban plans for inner city interventions, for restructure and transformation locations of
former harbour and industrial sites and for new locations. The focus will be on urban design
methods, instruments and guidelines and on sustainable urbanism in general in order to gather
knowledge on how to create future proof plans.

Study goals:

  • Has knowledge of urban design methods, instruments and guidelines.
  • Has knowledge of sustainable urbanism in general.
  • Has the ability to apply the knowledge of urban design methods, instruments and guidelines.
  • Has the ability to apply the knowledge of sustainable urbanism in general.
  • Has the ability to read and draw an urban map and associate profiles.

Context
This course will focus on methods and skills for urban design, for which plan analysis of existing
urban structures is an indispensable part. For sustainable urban design the accent in the lectures
lie on the qualities of the urban design, being an important aspect with a view to sustainability.
The second series, BK7250 Sustainable Urbanism, will focus on specific sustainable aspects as
water, energy, urban agriculture and green, reuse of waste and sustainable mobility

New course: Elementary Ergonomics

a new bachelor course Industrial Design Engineering: Elementary Ergonomics

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The course is an introduction to basic physical ergonomics theory and practice and consists of the following topics: anthropometry (1D, 2D, 3D including digital human modeling), biomechanics, comfort and use cues. Furthermore, the role of user involvement in the design process (evaluation of existing products and environments and of created concepts, models and prototypes) will be explained.
Gaining knowledge of basic physical ergonomics theory and related skills to apply this knowledge.
Become acquainted with user evaluation techniques.

Study Goals
Gaining knowledge of basic physical ergonomics theory and related skills to apply this knowledge.
Become acquainted with user evaluation techniques. Setting up and performing observational research with an existing product and deliberately selected users.

Educational Methods
Each topic will be introduced in a lecture. With each lecture goes an assignment in which the theory of the lecture will be applied.

Race Car Aerodynamics added to DUT Racing OpenCourseWare

Every year a multi-discplinary team of 90 students from Delft University of Technology design a new race car to compete in the Formula Student Competition.
The main goal of the team is education: giving prospective engineers the hands-on experience of developing and building an actual race car. Besides that they of course compete with their electronic 4WD car to win the Formula student competition, like they did in 2012 and 2013.

OpenCourseWare partnered with the DUT Racing team to publish a series of courses that show how the basic engineering education in Delft connects to the concrete DUT Racing engineering project.
This year special attention is paid to the aerodynamics of the DUT 14 race car. Dr. ir. Gerrit Elsinga from the Fluid Mechanics department explains the basics of Race Car Aerodynamics in two short video lectures.
Race Car Aerodynamics Part 1
YouTube Preview Image

Click here for Race Car Aerodynamics Part 2

Additionally, a number of courses that apply to the design of the DUT ’14 can be found under the following categories: Chassis, Vehicle Dynamics, Control Systems, Aerodynamics, Powertrain and Electronics.
The related OpenCourseWare, together with a short introduction on the category to which they are related, can be found under ocw.tudelft.nl/dutracing or http://dutracing.nl/explore-the-car/.

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