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Journal Articles

Exact Algebraic Solution of an Optimal Double-Mass Dynamic Vibration Absorber Attached to a Damped Primary System

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Toshihiko Asami
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research-Article
J. Vib. Acoust. October 2019, 141(5): 051013.
Paper No: VIB-18-1480
https://doi.org/10.1115/1.4043815
Published Online: June 14, 2019
View Articletitled, Exact Algebraic Solution of an Optimal Double-Mass Dynamic Vibration Absorber Attached to a Damped Primary System
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Topics: Algebra, Damping, Excitation systems, Optimization, Stability, Transfer functions, Vibration absorbers, Mechanical admittance
Journal Articles

Optimal Design of Double-Mass Dynamic Vibration Absorbers Minimizing the Mobility Transfer Function

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Toshihiko Asami, Yoshito Mizukawa, Tomohiko Ise
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research-Article
J. Vib. Acoust. December 2018, 140(6): 061012.
Paper No: VIB-17-1198
https://doi.org/10.1115/1.4040229
Published Online: June 18, 2018
View Articletitled, Optimal Design of Double-Mass Dynamic Vibration Absorbers Minimizing the Mobility Transfer Function
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Topics: Mechanical admittance, Optimization, Stability, Transfer functions, Vibration absorbers, Algebra
Proceedings Papers

Vibration Suppression Performance of a Desktop Vibration Isolator Supported by Four Air Spring

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Yuichi Baba, Kento Onishi, Toshihiko Asami
Proc. ASME. PVP2017, Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); SPC Track for Senate, V005T11A002, July 16–20, 2017
Publisher: American Society of Mechanical Engineers
Paper No: PVP2017-65109
https://doi.org/10.1115/PVP2017-65109
View Paper titled, Vibration Suppression Performance of a Desktop Vibration Isolator Supported by Four Air Spring
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Topics: Springs, Vibration isolators, Vibration suppression, Reservoirs, Pipes, Damping, Measuring instruments, Resonance, Vibration isolation
Journal Articles

Erratum: “Optimal Design of Double-Mass Dynamic Vibration Absorbers Arranged in Series or in Parallel” [ASME J. Vib. Acoust., 2017, 139(1), p. 011015; DOI: 10.1115/1.4034776]

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Toshihiko Asami
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Errata
J. Vib. Acoust. April 2018, 140(2): 027001.
Paper No: VIB-16-1558
https://doi.org/10.1115/1.4038108
Published Online: October 20, 2017
View Articletitled, Erratum: “Optimal Design of Double-Mass Dynamic Vibration Absorbers Arranged in Series or in Parallel” [ASME J. Vib. Acoust., 2017, 139(1), p. 011015; DOI: 10.1115/1.4034776]
Open the PDF for Erratum: “Optimal Design of Double-Mass Dynamic Vibration Absorbers Arranged in Series or in Parallel” [ASME J. Vib. Acoust., 2017, 139(1), p. 011015; DOI: 10.1115/1.4034776] in another window
Topics: Damping, Design, Dynamics (Mechanics), Vibration absorbers, Vibration isolation
Journal Articles

Pressure Sensitive Paint Visualization of Pressure Distribution of Externally Pressurized Circular Thrust Gas Bearing With a Single Gas Supply Hole: Experimental Validation of Variation of Pressure Distribution by Supply Pressure

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Tomohiko Ise, Shuma Kobayashi, Kazuhiro Itoh, Toshihiko Asami
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Briefs
J. Tribol. September 2017, 139(5): 054501.
Paper No: TRIB-16-1167
https://doi.org/10.1115/1.4035156
Published Online: April 6, 2017
View Articletitled, Pressure Sensitive Paint Visualization of Pressure Distribution of Externally Pressurized Circular Thrust Gas Bearing With a Single Gas Supply Hole: Experimental Validation of Variation of Pressure Distribution by Supply Pressure
Open the PDF for Pressure Sensitive Paint Visualization of Pressure Distribution of Externally Pressurized Circular Thrust Gas Bearing With a Single Gas Supply Hole: Experimental Validation of Variation of Pressure Distribution by Supply Pressure in another window
Topics: Bearings, Gas bearings, Pressure, Thrust, Paints, Numerical analysis, Visualization
Proceedings Papers

Numerical Analysis of an Air Spring With Two Tanks Connected by a Long Pipe: Effect of Orifice Installed in the Pipe

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Masatoshi Toji, Toshihiko Asami, Tomohiko Ise
Proc. ASME. PVP2016, Volume 5: High-Pressure Technology; Rudy Scavuzzo Student Paper Symposium and 24th Annual Student Paper Competition; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Electric Power Research Institute (EPRI) Creep Fatigue Workshop, V005T09A021, July 17–21, 2016
Publisher: American Society of Mechanical Engineers
Paper No: PVP2016-63448
https://doi.org/10.1115/PVP2016-63448
View Paper titled, Numerical Analysis of an Air Spring With Two Tanks Connected by a Long Pipe: Effect of Orifice Installed in the Pipe
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Topics: Numerical analysis, Pipes, Springs, Resonance, Finite difference methods, Frequency response, Inertia (Mechanics), Partial differential equations, Pressure, Vortices
Journal Articles

Optimal Design of Double-Mass Dynamic Vibration Absorbers Arranged in Series or in Parallel

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Toshihiko Asami
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research-Article
J. Vib. Acoust. February 2017, 139(1): 011015.
Paper No: VIB-16-1352
https://doi.org/10.1115/1.4034776
Published Online: November 23, 2016
View Articletitled, Optimal Design of Double-Mass Dynamic Vibration Absorbers Arranged in Series or in Parallel
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Topics: Optimization, Stability, Vibration absorbers, Design, Damping
Proceedings Papers

Validation of the Accuracy of Approximation in a Design Formula for an Air Spring by Using Numerical Analysis

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Toshihiko Asami, Yasutaka Yokota, Masahito Okura, Tomohiko Ise, Itsuro Honda, Hiroya Sakamoto
Proc. ASME. PVP2013, Volume 8: Seismic Engineering, V008T08A008, July 14–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: PVP2013-97724
https://doi.org/10.1115/PVP2013-97724
View Paper titled, Validation of the Accuracy of Approximation in a Design Formula for an Air Spring by Using Numerical Analysis
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Topics: Approximation, Design, Numerical analysis, Springs, Pipes, Finite difference methods, Flow (Dynamics), Frequency response, Pressure, Turbulence
Proceedings Papers

Analysis of Wave Propagation in Overhead Contact Wire of Trains Using the Transfer Matrix Method

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Takahiro Fukui, Toshihiko Asami, Tomohiko Ise
Proc. ASME. PVP2013, Volume 8: Seismic Engineering, V008T08A047, July 14–18, 2013
Publisher: American Society of Mechanical Engineers
Paper No: PVP2013-97850
https://doi.org/10.1115/PVP2013-97850
View Paper titled, Analysis of Wave Propagation in Overhead Contact Wire of Trains Using the Transfer Matrix Method
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Topics: Trains, Wave propagation, Wire, Vibration, Excitation, Vibration analysis, Elasticity, Periodic structures, Wear
Journal Articles

Numerical Analysis of the Internal Flow in an Annular Flow Channel Type Oil Damper

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Toshihiko Asami, Itsuro Honda, Atsushi Ueyama
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. March 2014, 136(3): 031101.
Paper No: FE-13-1404
https://doi.org/10.1115/1.4026057
Published Online: December 24, 2013
View Articletitled, Numerical Analysis of the Internal Flow in an Annular Flow Channel Type Oil Damper
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Topics: Dampers, Damping, Flow (Dynamics), Numerical analysis, Pistons, Pressure, Cylinders, Fluids
Proceedings Papers

An Approximate Formula to Calculate the Restoring and Damping Forces of an Air Spring With a Small Tube

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Toshihiko Asami, Yasutaka Yokota, Tomohiko Ise, Itsuro Honda, Hiroya Sakamoto
Proc. ASME. PVP2012, Volume 8: Seismic Engineering, 127-137, July 15–19, 2012
Publisher: American Society of Mechanical Engineers
Paper No: PVP2012-78481
https://doi.org/10.1115/PVP2012-78481
View Paper titled, An Approximate Formula to Calculate the Restoring and Damping Forces of an Air Spring With a Small Tube
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Topics: Damping, Springs, Frequency response, Resonance, Automobiles, Elastic constants, Flow (Dynamics), Harmonic motion, Railway vehicles, Vibration
Journal Articles

An Approximate Formula to Calculate the Restoring and Damping Forces of an Air Spring With a Small Pipe

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Toshihiko Asami, Yasutaka Yokota, Tomohiko Ise, Itsuro Honda, Hiroya Sakamoto
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research-Article
J. Vib. Acoust. October 2013, 135(5): 051029.
Paper No: VIB-12-1117
https://doi.org/10.1115/1.4023820
Published Online: July 1, 2013
View Articletitled, An Approximate Formula to Calculate the Restoring and Damping Forces of an Air Spring With a Small Pipe
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Topics: Damping, Pipes, Springs, Flow (Dynamics), Pressure, Elastic constants
Journal Articles

Theoretical and Experimental Analysis of the Nonlinear Characteristics of an Air Spring With an Orifice

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Toshihiko Asami, Yasutaka Yokota, Tomohiko Ise, Itsuro Honda, Hiroya Sakamoto
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research-Article
J. Vib. Acoust. February 2013, 135(1): 011012.
Paper No: VIB-11-1244
https://doi.org/10.1115/1.4007677
Published Online: February 4, 2013
View Articletitled, Theoretical and Experimental Analysis of the Nonlinear Characteristics of an Air Spring With an Orifice
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Topics: Damping, Elastic constants, Springs, Pressure
Proceedings Papers

Theoretical and Experimental Analysis of the Non-Linear Characteristics of an Air Spring With an Orifice

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Yasutaka Yokota, Toshihiko Asami, Tomohiko Ise, Itsuro Honda, Hiroya Sakamoto
Proc. ASME. PVP2011, Volume 4: Fluid-Structure Interaction, 487-495, July 17–21, 2011
Publisher: American Society of Mechanical Engineers
Paper No: PVP2011-57295
https://doi.org/10.1115/PVP2011-57295
View Paper titled, Theoretical and Experimental Analysis of the Non-Linear Characteristics of an Air Spring With an Orifice
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Topics: Experimental analysis, Springs, Damping, Dampers, Design, Elastic constants, Flow (Dynamics), Rails, Vibration isolation
Journal Articles

Closed-Form Exact Solution to H ∞ Optimization of Dynamic Vibration Absorbers (Application to Different Transfer Functions and Damping Systems)

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Toshihiko Asami, Professor, Mem. ASME, Osamu Nishihara, Associate Professor, Mem. ASME
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Technical Briefs
J. Vib. Acoust. July 2003, 125(3): 398–405.
https://doi.org/10.1115/1.1569514
Published Online: June 18, 2003
View Articletitled, Closed-Form Exact Solution to H ∞ Optimization of Dynamic Vibration Absorbers (Application to Different Transfer Functions and Damping Systems)
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Topics: Damping, Optimization, Transfer functions, Vibration absorbers, Design
Journal Articles

H 2 Optimization of the Three-Element Type Dynamic Vibration Absorbers

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Toshihiko Asami, Osamu Nishihara
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Technical Papers
J. Vib. Acoust. October 2002, 124(4): 583–592.
https://doi.org/10.1115/1.1501286
Published Online: September 20, 2002
View Articletitled, H 2 Optimization of the Three-Element Type Dynamic Vibration Absorbers
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Topics: Optimization, Vibration absorbers, Design, Damping
Journal Articles

Closed-Form Solutions to the Exact Optimizations of Dynamic Vibration Absorbers (Minimizations of the Maximum Amplitude Magnification Factors)

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Osamu Nishihara, Associate Professor, Toshihiko Asami, Associate Professor
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Technical Papers
J. Vib. Acoust. October 2002, 124(4): 576–582.
https://doi.org/10.1115/1.1500335
Published Online: September 20, 2002
View Articletitled, Closed-Form Solutions to the Exact Optimizations of Dynamic Vibration Absorbers (Minimizations of the Maximum Amplitude Magnification Factors)
Open the PDF for Closed-Form Solutions to the Exact Optimizations of Dynamic Vibration Absorbers (Minimizations of the Maximum Amplitude Magnification Factors) in another window
Topics: Damping, Magnification, Resonance, Vibration absorbers, Algebra, Antiresonance
Journal Articles

Analytical Solutions to H ∞ and H 2 Optimization of Dynamic Vibration Absorbers Attached to Damped Linear Systems

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Toshihiko Asami, Osamu Nishihara, Amr M. Baz
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Technical Papers
J. Vib. Acoust. April 2002, 124(2): 284–295.
https://doi.org/10.1115/1.1456458
Published Online: March 26, 2002
View Articletitled, Analytical Solutions to H ∞ and H 2 Optimization of Dynamic Vibration Absorbers Attached to Damped Linear Systems
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Topics: Damping, Optimization, Approximation, Vibration absorbers, Excitation systems
Journal Articles

Analytical and Experimental Evaluation of an Air Damped Dynamic Vibration Absorber: Design Optimizations of the Three-Element Type Model

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Toshihiko Asami, Osamu Nishihara
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research Papers
J. Vib. Acoust. July 1999, 121(3): 334–342.
https://doi.org/10.1115/1.2893985
Published Online: July 1, 1999
View Articletitled, Analytical and Experimental Evaluation of an Air Damped Dynamic Vibration Absorber: Design Optimizations of the Three-Element Type Model
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Topics: Design, Vibration absorbers, Dampers, Pistons, Springs, Cylinders, Damping, Shock absorbers