Results 31 to 40 of about 15,934 (132)

A New Mathematical Modeling Method for Four‐Stage Helicopter Main Gearbox and Dynamic Response Optimization

open access: yesComplexity, Volume 2019, Issue 1, 2019., 2019
A new mathematical modeling method, namely, the finite element method and the lumped mass method (LMM‐FEM) mixed modeling, is applied to establish the overall multinode dynamic model of a four‐stage helicopter main gearbox. The design of structural parameters of the shaft is the critical link in the four‐stage gearbox; it affects the response of ...
Yuan Chen   +6 more
wiley   +1 more source

A Coupling Dynamics Analysis Method for Two‐Stage Spur Gear under Multisource Time‐Varying Excitation

open access: yesShock and Vibration, Volume 2019, Issue 1, 2019., 2019
A new modeling method is proposed to simulate the dynamic response of a two‐stage gear transmission system using the finite element method (FEM). The continuous system is divided into four modules: shaft‐shaft element, shaft‐gear element, shaft‐bearing element, and gear‐gear element. According to the FEM, the model is built with each element assembled.
Zizhen Qiao   +4 more
wiley   +1 more source

Dynamic Analysis of Helical Planetary Gear Sets under Combined Force and Moment Loading

open access: yesShock and Vibration, Volume 2017, Issue 1, 2017., 2017
The dynamic behavior of a single‐stage planetary gear set with helical gears of multishaft automotive automatic transmissions has been studied, in which one component of the planetary gear set is imposed by additional external vertical and axial loading from countershaft gear pair in addition to the moment.
Yanfang Liu   +4 more
wiley   +1 more source

Dynamic Analysis of Integrally Geared Compressors with Varying Workloads

open access: yesShock and Vibration, Volume 2016, Issue 1, 2016., 2016
Integrally geared compressors are characterized by compact and high efficiency machines, which are widely used in modern processing industries. As an important part of integrally geared compressors, a geared rotor‐bearing system exhibits complicated dynamic behaviors.
Ming Zhang   +3 more
wiley   +1 more source

Bentuk-Bentuk Gerabah Kubur Peti Batu Sokoliman: Hubungannya Dengan Tahap Penguburan

open access: yesBerkala Arkeologi, 1989
Kompleks kubur peti batu di Gunung Kidul tersebut telah diteliti oleh J.L. Moens pada tahun 1934, kemudian dilanjutkan oleh van der Hoop pada tahun berikutnya. Kompleks kubur peti batu tersebut antara lain terdapat di Kajar, Sokoliman, dan Bleberan. Pada
Goenadi Nitihaminoto
doaj   +1 more source

Fault Feature Analysis of a Cracked Gear Coupled Rotor System

open access: yesMathematical Problems in Engineering, Volume 2014, Issue 1, 2014., 2014
Considering the misalignment of gear root circle and base circle and accurate transition curve, an improved mesh stiffness model for healthy gear is proposed, and it is validated by comparison with the finite element method. On the basis of the improved method, a mesh stiffness model for a cracked gear pair is built.
Hui Ma   +4 more
wiley   +1 more source

Hubungan Indonesia Dengan Brunei Darussalam Melalui Kajian Inskripsi Pada Batu Nisan

open access: yesBerkala Arkeologi, 1994
Batu-batu nisan/kubur dapat dikatakan sebagai sebuah prasasti masa Islam karena mengandung informasi siapa dan waktu seseorang meninggal dunia. Selain itu ditemui silsilah keturunan dan dari mana asalnya.
Achmad Cholid Shodrie
doaj   +5 more sources

A New Species of Tarantula Spider in the Genus Lyrognathus Pocock 1895 (Araneae, Theraphosidae) from Sumatra

open access: yesInternational Scholarly Research Notices, Volume 2013, Issue 1, 2013., 2013
A new species is described in the tarantula genus Lyrognathus Pocock 1895, being the first record of this taxon from Sumatra, Indonesia. Lyrognathus giannisposatoi sp. nov. is also unique in its habitat selection, being the first confirmed lowland species from this genus.
Steven C. Nunn   +5 more
wiley   +1 more source

KUBUR TEMPAYAN DI KABUPATEN ALOR NUSA TENGGARA TIMUR

open access: yesForum Arkeologi, 2016
Jar Burial found in Southeast Asia especially in the islands of Indonesia, one of which was found in AlorRegency, East Nusa Tenggara. Jar burial in Alor is a new data to add the variety of burial culture in Indonesia and to complete the data about burial
Ati Rati Hidayah
doaj   +1 more source

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