Construction and maintenance of JIANT, a quality engineering tool for Safety&MissionAssurance platform

JAXA Supercomputer System Annual Report February 2025-January 2026

Report Number: R25EH2900

Subject Category: Common Business

Responsible Representative: Yuji Kado, Manager, Safety and Mission Assurance Department
Contact Information: Kado, Yuji, JAXA Safety and Mission Assurance Department(kado.yuji@jaxa.jp)
Members: Takumi Doi, Ryo Inoue, Youichi Iiyama, Yuji Kado, Tokikatsu Namba, Chihiro Terai, Hirotaka Yoshikura, Hitoshi Yoshihara

Abstract

JAXA and Kyoto University are researching with quality engineering tools (JIANT) and wallstat, a seismic simulator for wooden buildings.

Our theme is research on the combination of testing and simulation (data assimilation).This study is a joint research of JAXA-Kyoto University-Osaka Institute of Techinology-Nara　Womans University-HiroshimaUniv.-OitaUniv-KumamotoUniv.-Architectural Research Institute.

Reference URL

N/A

Reasons and benefits of using JAXA Supercomputer System

The purpose of using a supercomputer is to speed up calculations.

The calculation of wallstat takes 40 minutes per case on a general PC.

That means that if we perform 6000 calculations in one case study, it takes a total of 160 days, but if we use JSS3, we can complete them in a few hours.

Achievements of the Year

We conducted joint research with Kyoto University's Research Center for Sustainable Humanosphere, Kumamoto University, and the Building Research Institute. This year, we performed seismic response analysis of wooden houses assuming progressively progressing biological degradation. Using a multi-level orthogonal array with JIANT, we generated parameters for wooden buildings considering various forms of biological degradation, and performed calculations using wallstat with JSS3. The results, calculated using a reduction coefficient for wall strength, suggested that an approximate response could be estimated. The results were reported in the Research Report of the Kyushu Branch of the Architectural Institute of Japan, No. 65, March 2026.

Fig.1: Floor plan of the first floor (Red: plywood shear wall, Blue: wall where deterioration begins)

Fig.2: Relationship between story shear force coefficient and maximum response deformation of the lowest floor (BSL wave input)

Publications

N/A

Usage of JSS

Computational Information

Process Parallelization Methods: N/A
Thread Parallelization Methods: N/A
Number of Processes: 1
Elapsed Time per Case: 7200 Second(s)

JSS3 Resources Used

Fraction of Usage in Total Resources*1(%): 0.10

Details

Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.

Computational Resources
System Name	CPU Resources Used (Core x Hours)	Fraction of Usage*2(%)
TOKI-SORA	98.97	0.00
TOKI-ST	129600.25	0.13
TOKI-GP	0.00	0.00
TOKI-XM	10626.99	3.65
TOKI-LM	0.00	0.00
TOKI-TST	137476.86	2.25
TOKI-TGP	0.00	0.00
TOKI-TLM	0.00	0.00

File System Resources
File System Name	Storage Assigned (GiB)	Fraction of Usage*2(%)
/home	1024.00	1.64
/data and /data2	102400.00	0.67
/ssd	0.00	0.00

Archiver Resources
Archiver Name	Storage Used (TiB)	Fraction of Usage*2(%)
J-SPACE	0.00	0.00

*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).

*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.

ISV Software Licenses Used

ISV Software Licenses Resources
	ISV Software Licenses Used (Hours)	Fraction of Usage*2(%)
ISV Software Licenses (Total)	3805.84	2.67

*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.