Douglas P. Taylor, President Taylor Devices, Inc. N. Tonawanda, New York

December 2012

Founded in 1955 by Paul H. Taylor

Traditional business is 40% military with commercial products based on proven military designs

Product Lines Dampers Shock Absorbers Vibration Isolators Gun Mounts Shock Transmission Devices Fluid Springs Air Springs Shock Isolation Systems Satellite Deployment Systems

Taylor Devices Incorporated

Naval Shock Isolators

End of Travel Damper

Atlas Launch Vehicle Dampers

Seismic Dampers

The Concepts

Fluid Dampers: Dissipate energy within a system by converting it to heat. Damping forces are out of phase with structural stress.

Isolators: Provide a low frequency bypass or connection between masses. Isolators usually include damping and spring elements.

Reduced Deflection and Stress Reduce Contents Damage Improved Biodynamics Architectural Enhancement Reduced Cost

Improvement Areas

This presentation will introduce two long-standing axioms in the aerospace/defense community:

1. All shock and vibration is the same . . . It’s only the mass that changes.

2. To mitigate shock and vibration effects on a structure you must:

Know the Input

Bound the Output

Mitigate the Difference

Comparisons

Northridge Earthquake .9 g .9 m/s

Kobe Earthquake .8 g 1.3 m/s

Ship, Moored Mine 25.0 g+ 2.3 m/s+

Missile Silo, Nuclear Air Burst 80.0 g+ 11.4 m/s+

Submarine, Nuclear Depth Charge 600.0 g+ 12.7 m/s+

Peak Acceleration

Peak Velocity

Damped or Isolated Response to Forced Resonance

Critical Damping Ratio,

Magnification Factor = ζ21

ζ=CRC

C

Damped Response to Impulsive Inputs

Isolated Response to Impulsive Inputs

Today’s large fluid dampers for seismic protection are Cold War era military and space technology which was commercialized, beginning in 1990, with approval. Major programs using high capacity dampers: Navy – Air Force –

Triple T Missiles, 1955 Atlas ICBM, 1959 F-8 Aircraft, 1955 KC10 Aircraft, 1975

Tomahawk Missile, 1979 MX ICBM, 1977 Seawolf Submarine, 1985 B-2 Stealth Bomber, 1986

Virginia Class Submarine, 1998 Army – NASA – CH54 Skycrane Helicopter, 1965 Apollo Program, 1962

M109A6 Paladin, 1986 Space Shuttle, 1977 THAAD Missile, 1990 Atlas V EELV, 2002

Seismic Dampers ~ Everything Old Is New Again

The concept of seismic dampers started as −

. . . A idea from 1989 . . .

The Cold War had ended, Taylor Devices’ damping technology was declassified, so . . .

“Let’s take fluid dampers out of ballistic missile silos and put them in buildings for seismic, wind, and vibration protection.”

Doug Taylor, U/B 1971 David Lee, Caltech 1952

Dampers ~ Private Sector Commercialization

Seismic Testing at UB Steel Moment Frame Building

1-Story, No Dampers, El Centro 33.33%

Total Damping = 2%

1-Story, 2 Dampers, El Centro 100%

Total Damping = 22%

Seismic Testing at UB Steel Moment Frame Building

Comparison Testing in Japan at E-Defense Lab

Two identical full-size, five-story buildings Input was 100% of 1995 Takatori (Kobe)

earthquake E-Defense shake table is the largest on earth

Watch the videos and then answer this question: “Do dampers work?”

Five-story Building Without Seismic Dampers

Identical Five-story Building With Taylor Devices’ Seismic Dampers

Project Overview

Including: 16 Airport Structures

19 Hospitals

15 Stadiums

Los Angeles and Hayward City Halls in California

San Francisco Civic Center

Tokyo-Rinkai Hospital

Jimbo-Cho Office Building, Tokyo

San Francisco-Oakland Bay Bridge

Millennium Bridge Retrofit in the U.K.

26 Tall Buildings, including the Petronas Twin Towers in Malaysia

~ 450 Buildings and Bridges to Date ~

Project Example

Arrowhead Regional Medical Center located in Colton, California

Base Isolation Dampers − New Build

Project Example

ASE-II Building located in Bucharest, Romania

Base Isolation Dampers − Retrofit

Project Example

Pacific Bell Emergency Center located in Sacramento, California

Dampers in Chevron Braces − Retrofit

Project Example

Bill Emerson Memorial Bridge located in Cape Girardeau, Missouri

Main Deck-to-Pier Dampers − New Build

Project Example

Richmond-San Rafael Bridge located in San Francisco, California

Main Deck-to-Pier Dampers − Retrofit

Project Example

111 Huntington located in Boston, Massachusetts

Dampers in Toggle Braces − New Build

Project Example

Park Tower Hyatt located in Chicago, Illinois

Dampers at top floor in Tuned Mass Damper System − New Build

Project Example

Torre Mayor located in Mexico City, Mexico

Mega-Brace Dampers − New Build

Project Example

Tokyo Rinkai Hospital located in Tokyo, Japan

Base Isolation Dampers − Design “borrowed” from Arrowhead Regional

Project Example

Baseball Stadium located in Seattle, Washington

Dampers in Roof Truss System − New Build

Project Example

Portland State University, or Smith Memorial Student Union Building located in Portland, Oregon

An “in-situ” retrofit of 118 Seismic Dampers without disrupting students

Fluid Dampers and Isolation for Seismic Protection:

New Structures will be better, and will cost less

Lifelines will be more survivable

Historic structures can be preserved

Existing structures can be simply upgraded

Conclusions

Damping & Isolation ~ Into the Future

www.shockandvibration.com

www.taylordevices.com

Phone: 716.694.0800 Fax: 716.695.6015

www.seismicdamper.com

90 Taylor Drive, P.O. Box 748 North Tonawanda, NY 14120-0748

The Leader in Innovative Shock Control