��

KKEKKE Structural Engineering SolutionStructural Engineering Solution��

��

����

��

��

�������� �� ��

Engineering Consulting Services for Wind Turbine Towers��

��

������

������

Consulting Services for Wind Turbine Towers

As “Ministerial Ordinance for Establishing Technical Standards for Wind Power Generation Equipment” was revised in April

2014, it is mandatory for new wind turbine towers in Japan to be inspected under the construction project review set forth in

Electricity Business Act. Kozo Keikaku Engineering Inc. provides comprehensive engineering services concerning the

regulation, from applying to obtaining the approval from the authority.

�Services Unique to KKE • Attend the meetings at Regional Industrial Safety and Inspection Department and handle Q&As. • Support Ministry evaluation procedure when the turbine is regarded as "specialized equipment". • The work can be ordered partially as you like. (i.e. time-history analysis only, tower design only, foundation design only,

etc.) • We can handle all issues/tasks concerning the wind turbine towers. Analysis software is also available. (i.e. creating

simulation seismic waves, time-history response analysis, response displacement of piles, coupled analysis of soil-foundation-tower, etc)

• English and Spanish available. • Participating in the committee for writing "The Guidelines for Design of Wind Turbine Support Structures and Foundations".

�Our Specialties As an independent engineering firm, we are the only design firm in Japan that provides engineering support services for inspection/approval procedure of wind turbine towers established by METI. Having participated in compiling of the inspection procedure manual and provided its trainings to examination officers of wind turbine towers, we know the bureaucratic procedure in every detail, not to mention evaluation and assessment of tower structures.

● Project Overview Under the Electricity Business Act

Wind Load Evaluation (Extra Coefficient) Time-history

Response Analysis������SR �����

Input Seismic Waves (Historical & Site-specific)

For Special Cases

Wind Loads Seismic Loads

����

Tower & Foundation Design

Submitting Construction Plan to Regional Industrial Safety and

Inspection Department

Electric Power Safety Division,

Commerce, Distribution and

Industrial Safety Policy Group, METI� ��������

������ Construction Launch

On Site Survey (Boring/Topography)

Additional Study

Tower & Foundation Design: 1-3 mon.

Inspection: 3mon. (Special cases)

Inspection: 1mon. (Typical cases)

Additional Study

���

���

��

3 Spectra of Seismic Wave

Site-specific Wind Speed Multiplier

����

������

����

�����

����

�����

����

�����

����

����

����

����

����

����

����

����

����

����

�����

����

�#�

��$�

�

��

���

���

���

���

���

���

����

����

����

�����

�����

�����

������

� !�#�

��

����

�����

�����

�������

����

������

������

�������

�������

�������

��������

��������

��������

���� !�#��

��������

��������

����

����

����

����

����

�����

�����

�����

������

��� !�

���"������"������"�������"���%�����

FEM Analysis of Tower

Engineering Assessment Services ●Wind Load Evaluation The wind load to the turbines and support towers are variant, much dependent on the turbulence caused by geographical factors, like hills, mountains, and capes. Considering such impacts, we calculate and obtain appropriate wind loads to a wind turbine tower. ●Input Seismic Wave Studying the historical records of earthquakes and active faults around the wind farm, we create a site-specific seismic wave to conduct time-history response analysis of turbine towers. ●Time-history Response Analysis In order to evaluate if the wind turbine support tower can withstand earthquakes, we run time-history response analysis of the lumped mass model that represents the wind turbine, using the regulated input seismic waves. The model also reflects the profiles of the soil by using sway and rocking springs. ●Other Services Other engineering assessment services such as evaluating the influence of soil deformation to piles or performing coupled analysis of soil-foundation-tower are available.

Soil-Structure Analysis by “K-SHAKE” Software

Tower�

Pile�

Symmetric-axis

Foundation�

Soil�

Coupled Analysis of Soil-Foundation-Tower (offshore)

Multi-mass-point SR Model

FEM Analysis of Tower

(

50 )

4-

7

3 50

26

1

)

)(

(

((

)

)

)

(

)

)

( )

(

(

057463-,

821

9

Tower: Symmetric Bending Shear Element Foundation: Symmetric Solid Element Pile: Ring Pile Element Soil: Symmetric Solid Element

Pile Evaluation by Response Displacement Method

Multi-mass-point-embedded SR Model

Tower

Foundation

Nacelle

as of Dec. 2015�

WORK SEGMENTATION

Wind Farm Owner

Wind Turbine Manufacturer EPC

Construction

Company KKE

Japanese Foreign Site-specific Wind Load

Evaluation × ○ � ○ × ○ Specifying Input Seismic

Waves × × × × ○ ○ Time-history Response

Analysis × × × × � �

Tower Design × � � × � ○ Foundation Design × × × � ○ ○ Documentation � � � � � �

Inspection Process � � � × � �

� ACHIEVEMENTS �

As of Dec. 2015

Number of Projects for Wind Turbine Towers

�MLIT Approval x 18 sites Documentation and Committee and subcommittee [Until Mar. 2014] meeting attendance �Construction Plan x� 13 sites Submission of construction plan and correspondences [Effective from April 2014] w/regional industrial safety and inspection department �Time-history Response Analysis x 38 sites Specifying historical and site-specific input seismic

(approx. 297 towers) waves and conduct high-end analysis �Foundation Design x 28 sites Design and pile-foundation study with displacement (approx. 181 towers) analysis �Structural Evaluation of Wind Turbine Tower x 15 sites �Wind Load Evaluation x 6 sites Site-specific wind speed evaluation by MASCOT �Consultation for Japanese Market Specifications x 7 sites And �Commissioned Business by METI

Safety Inspection Survey and Training Services for Wind Turbine Generating Equipment [Since April 2013]

<CONTACT US> Engineering Consulting Sales Dept. KOZO KEIKAKU ENGINEERING INC. E-mail:eng-kozo@kke.co.jp TEL:+81-(0)3-5342-1136