Zobrazeno 1 - 10
of 175
pro vyhledávání: '"Takahiro, Tomioka"'
Autor:
Yuta KONNO, Takahiro TOMIOKA
Publikováno v:
Mechanical Engineering Journal, Vol 11, Iss 5, Pp 24-00222-24-00222 (2024)
Periodic structures are known to have specific frequency ranges called band gaps, where the transmission of elastic waves is suppressed. Research on band gap formation in mechanical structures has recently gained considerable attention, and there is
Externí odkaz:
https://doaj.org/article/b68a8b8555b14f128148be6cb8579339
Autor:
Takato Murai, Takahiro Tomioka, Marin Takaso, Arisa Takeda, Mami Nakamura, Shinya Koshinuma, Yumiko Tateoka, Masahito Hitosugi
Publikováno v:
Forensic Sciences, Vol 4, Iss 2, Pp 211-220 (2024)
Practically, when only parts of an unidentified human body are found, age estimation with limited materials is required. The purpose of this study was to investigate methods for estimating age using the uterus and ovaries. Among forensic autopsies pe
Externí odkaz:
https://doaj.org/article/f2042ff8ba034a39853db1dc2415a3cb
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 90, Iss 936, Pp 24-00023-24-00023 (2024)
Vibration reduction strategies based on wave propagation phenomena, such as generating band gaps in periodic structures, are attracting attention in the field of mechanical engineering. This paper investigates how the structural and material composit
Externí odkaz:
https://doaj.org/article/adb6668bf15b42f7836d5daacc0ef962
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 90, Iss 936, Pp 24-00018-24-00018 (2024)
This paper describes the construction of the numerical model of a passive damping device called eMDVA (embedded Mass Dynamic Vibration Absorber) and experimental investigation of the eMDVA's multi-modal damping effect for elastic vibrations of a plat
Externí odkaz:
https://doaj.org/article/4f1595f6b2fd4d8bb4cc4e00ad2eebb9
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 90, Iss 929, Pp 23-00030-23-00030 (2024)
The interior noise characteristics of railway vehicles vary depending on the position of the cabin. In general, interior noises are louder in the area directly above bogies (ends of the cabin) than in the center of the cabin. It has been known that s
Externí odkaz:
https://doaj.org/article/6f488d5ef8594b6a9c0f7adc0a69da1d
Autor:
Takahiro TOMIOKA
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 89, Iss 924, Pp 23-pre01-23-pre01 (2023)
Externí odkaz:
https://doaj.org/article/29a4a3477d8f43459abc65945baa6df7
Autor:
Ken-ichiro AIDA, Yuki AKIYAMA, Tadao TAKIGAMI, Takahiro TOMIOKA, Takefumi MIYAMOTO, Daichi NAKAJIMA
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 89, Iss 924, Pp 23-00129-23-00129 (2023)
Vertical vibrations in railway vehicles are not only induced by track irregularity but also affected by the rotation of wheelsets with small mass imbalance. It is known that the excitation force generated by the rotation of wheelsets is transmitted f
Externí odkaz:
https://doaj.org/article/cd1d6cba0378499295be5db0a4d703b0
Autor:
Shizuya YAMAGUCHI, Takahiro TOMIOKA
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 89, Iss 926, Pp 23-00081-23-00081 (2023)
Three-dimensional (3D) elastic vibrations in railway vehicle carbodies sometimes negatively impact ride comfort, and efficient numerical analysis methods are required to study effective countermeasures. The authors proposed in their former work a new
Externí odkaz:
https://doaj.org/article/f9be21a544e74fd5b180c14fd1cc5e97
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 88, Iss 910, Pp 22-00017-22-00017 (2022)
Several standards or manuals are available for the test methods of damping capacity of damping materials such as composites or laminated damping steel sheets; however, few documents focus on lightly damped materials like metallic alloys. This study i
Externí odkaz:
https://doaj.org/article/81d519403ec848938e7966abbe6e2741
Autor:
Hikaru ISHIZAWA, Takahiro TOMIOKA
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 88, Iss 910, Pp 22-00018-22-00018 (2022)
Recently, one of the authors proposed a multi-modal and multi-axis vibration reduction device against elastic vibrations of structures. The device is called eMDVA (embedded Mass Dynamic Vibration Absorber). The eMDVA consists of a ball-like mass embe
Externí odkaz:
https://doaj.org/article/0c1af5fc0d3840cd893478ad8fa2023e