Faculty Profiles - Naoto Nishiyama

写真a

Naoto Nishiyama

Degree

Master(Engineering) Coursework ( 2019.3 Fukui University of Technology )

Research Interests

Impact oscillation
Nonlinear vibration

Research Areas

Informatics / Mechanics and mechatronics

Education

Fukui University of Technology Department of Mechanical Engineering Graduated

2013.4 - 2017.3
Fukui University of Technology Department of Applied Science and Engineering Master's Course Completed

2017.4 - 2019.3
Fukui University of Technology Department of Applied Science and Engineering Master's Course Completed

2019.4 - 2021.3

Research History

Fukui University of Technology Lecturer

2019.4

Professional Memberships

The Japan Society of Mechanicai Engineering

2017.4

Qualification acquired

High School Teacher Specialization License
First Kind of High School Teacher License

Papers

Non-planar motions due to nonlinear interactions between unstable oscillatory modes in a cantilevered pipe conveying fluid Reviewed

K. Yamashita, K. Kitaura, N. Nishiyama, H. Yabuno

Mechanical Systems and Signal Processing 178 ( 109183 ) 2022

　More details

Cantilevered pipes conveying fluid with an end mass exhibit rich post-critical nonlinear　behaviors and have attracted the interest of many researchers. In the present paper, we　focus on non-planar motions due to nonlinear interactions between two unstable oscillatory　modes. By applying the orthogonality condition between the　eigenfunction and its adjoint function to governing equations, evolution equations governing mixed-mode non-planar motions are analytically derived. In a certain range of flow velocity, mixed-mode non-planar motion can be produced. In this region, second- and third-mode oscillations are in distinct planes, which intersect perpendicularly. In particular, three-dimensional non-contacting measurements were conducted to verify the theoretical predictions, and hidden nonlinear modal interactions were extracted from experimental data. We observed mixed-mode non-planar motion that qualitatively agrees with the theoretical predictions. Moreover, in further experiments with a long pipe for future study, a sequence of bifurcating non-planar motions was observed.
Hopf-Hopf interactions in a spring-supported pipe conveying fluid Reviewed International journal

K. Yamashita, N. Nishiyama, K. Katsura, H. Yabuno

Mechanical Systems and Signal Processing 151　 ( 107390 ) 2021
Suppression of impact oscillations in a railway current collection system with an additional ocsillatory system Reviewed

N. Nishiyama, K. Yamashita

Perspectives in Dynamical Systems III: Control and Stability 15 - 22 2021
Effect of the coupled oscillatory system on impact oscillations between a pantograph and a rigid conductor line Reviewed

Transactions of the JSME(in japanese) 86 ( 881 ) 2020.1
Experimental study on the impact oscillations between a two-degree-of-freedom system and a sinusoidally vibrating plate Reviewed

( 49 ) 33 - 40 2019.12
Nonlinear stability of a spring-supported pipe conveying fluid Reviewed

Kiyotaka Yamashita，Naoto Nishiyama，Kohsuke Katsura，Hiroshi Yabuno

Applicable Solutions in Non-Linear Dynamical Systems 539 - 546 2019.12

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Teaching Experience

Science Literacy

Institution：Fukui University of Technology
Introduction to PhysicsⅠ

Institution：Fukui University of Technology
Experiment of Mechanical Engineering

Institution：Fukui University of Technology
Career SeminarⅠ

Institution：Fukui University of Technology
Career SeminarⅡ

Institution：Fukui University of Technology
Creative ScienceⅠ

Institution：Fukui University of Technology
Mechanical Experiment and Drawing

Institution：Fukui University of Technology
Theme Study

Institution：Fukui University of Technology
Career SeminarⅢ

Institution：Fukui University of Technology
Career SeminarⅣ

Institution：Fukui University of Technology
DynamicsⅠ

Institution：Fukui University of Technology
Introduction to PhysicsⅡ

Institution：Fukui University of Technology
Creative ScienceⅡ

Institution：Fukui University of Technology

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