foundations for wind turbines - Iowa State University [PDF]

Design requirements,. Foundation types. 1. Overview of geotechnical engineering. • Soil mechanics. • Site investigat

129 downloads 25 Views 2MB Size

Recommend Stories


fans for wind turbines
The wound is the place where the Light enters you. Rumi

Wind turbines
Raise your words, not voice. It is rain that grows flowers, not thunder. Rumi

Airfoil Characteristics for Wind Turbines
Do not seek to follow in the footsteps of the wise. Seek what they sought. Matsuo Basho

retrofit winglets for wind turbines
The best time to plant a tree was 20 years ago. The second best time is now. Chinese Proverb

retrofit winglets for wind turbines
Be grateful for whoever comes, because each has been sent as a guide from beyond. Rumi

Wind Turbines and Health
Make yourself a priority once in a while. It's not selfish. It's necessary. Anonymous

Wind Turbines and Health
You have to expect things of yourself before you can do them. Michael Jordan

in wind turbines
If your life's work can be accomplished in your lifetime, you're not thinking big enough. Wes Jacks

Protection of wind turbines
Happiness doesn't result from what we get, but from what we give. Ben Carson

Small Scale Wind Turbines Optimized for Low Wind Speeds
Where there is ruin, there is hope for a treasure. Rumi

Idea Transcript


FOUNDATIONS FOR WIND TURBINES ENGR 340 – Fall 2011

Jeramy C. Ashlock

Vern Schaefer

Assistant Professor, CCEE

Professor, CCEE

OUTLINE Topics Design requirements, Foundation types Overview of geotechnical engineering • Soil mechanics • Site investigations • In-situ tests • Laboratory tests

Foundations for wind turbines, Design example

Lecture #

1

1&2

2 2

TURBINE FOUNDATION LOADS 

   



Vertical, shear forces and significant overturning moments are transmitted to foundation by tower Must be resisted within tolerances for foundation settlement and tilt Manufacturers typically specify horizontal and rotational foundation stiffness criteria Loading direction changes with wind direction and nacelle orientation Circular foundation shape is therefore optimal, but straight-sided (e.g. octagonal, hexagonal) is easier to construct Anchors can be used to add rotational strength 3

FOUNDATION CONTACT STRESS UNDER ECCENTRIC/MOMENT LOADS To prevent loss of contact and uplift, the foundation is typically designed such that the eccentricity e of the resultant is e < B/6. In other words, M

Smile Life

When life gives you a hundred reasons to cry, show life that you have a thousand reasons to smile

Get in touch

© Copyright 2015 - 2024 PDFFOX.COM - All rights reserved.