担当区分：最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

The virtual element method is an approximate solution method for partial differential equations that does not require the explicit definition of interpolation functions for test and trial functions in the elements. Accordingly, it can easily handle polygonal and polyhedral elements, including nonconvex shapes, and it has begun to attract attention as a generalization of the finite element method. As one of the two terms that constitute the internal virtual work, the stabilization term has received little attention, and methods for determining the stabilization parameter have not been proposed to date. Thus, in this study, we focus on the stabilization parameter of the stabilization term. Through a series of eigenvalue analyses of the stiffness matrices, we show that the stabilization parameter corresponds to the energy of the mode not included in the consistency term. From this consideration, we propose a method for setting the stabilization parameter appropriately.

DOI： 10.1016/j.cma.2024.117106

Kyutacar

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85195198904&origin=inward

記述言語：英語   掲載種別：記事・総説・解説・論説等（学術雑誌）

In July 2020, the Kyushu region experienced record-breaking heavy rains from July 4 to7, causing extreme floods in the Kuma and Chikugo Rivers. This was followed by atmospheric instability over a wide area from western Japan to the Tohoku region, resulting in heavy rainfall on July 13-14 in the Chugoku region, and on July 27-28 in the Tohoku region. There was also flooding of large rivers including the Go River and the Mogami River. In recent years, record-breaking torrential rainfall disasters have been occurring every year. The heavy precipitation scale has been increasing in space and time as well as in rainfall intensity, resulting in spatio-temporal expansion of the damage. Furthermore, in 2020, the disaster occurred amidst the restriction of social activities due to the COVID-19 pandemic. The compilation and dissemination of disaster survey data and lessons are essential for the sustainable development of society. Therefore, JSCE has planned a special issue on the July 2020 torrential rain disaster to share and disseminate disaster information and to contribute to the advancement of technology and science related to disaster prevention and mitigation.

DOI： 10.2208/JOURNALOFJSCE.10.1_545

Kyutacar

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85148295769&origin=inward