巻号一覧
44 巻 (2006)
- 6 号 p. 322-
- 5 号 p. 248-
- 4 号 p. 174-
- 3 号 p. 124-
- 2 号 p. 68-
- 1 号 p. 3-
前身誌
44 巻, 6 号
選択された号の論文の7件中1～7を表示しています
- |<
- <
- 1
- >
- >|
論文
-
Shigenori AKAMATSU, Kazuyoshi SEKINE2006 年 44 巻 6 号 p. 322-330
発行日: 2006年
公開日: 2007/01/10
ジャーナル フリーIn this paper, we present experimental results of an investigation of the relation between ultrasonic waveforms excited by a Q-switched pulse laser at 1064, 532, and 355 nm. As a result the 355 nm wavelength source proved best because it provides stronger impact and is most suitable for generating P-waves. Using a 532 nm source did not provide proper impact for concrete. We inspected an artificial defect in a concrete specimen using 1064 and 355 nm wavelengths of the pulse laser. The peak in opposite phase with the transmitted P-wave is used to estimate the distance of the flaw. Using the 355 nm pulse laser the result was in good agreement with the true value of the distance of the artificial defect from the specimen surface.抄録全体を表示PDF形式でダウンロード (360K) -
第3報: 石油タンクのアニュラ板の局部減肉が地震時浮上り応力に与える影響山口 悟, 石田 和雄, 茨田 高志, 河野 和間, 関根 和喜, 丸山 裕章2006 年 44 巻 6 号 p. 331-340
発行日: 2006年
公開日: 2007/01/10
ジャーナル フリーIn 1978, Off-Miyagi Prefecture Earthquake in Japan caused damage to large oil storage tanks. Their annular plates had been greatly reduced in thickness due to local corrosion, and they were broken by uplifting due to the earthquake. In order to examine the stress tendency of annular plates with local metal loss during uplift by earthquakes, nonlinear static uplift analyses by three-dimensional shell FEM were carried out on a 110, 000kl oil tank. The sizes of locally reduced parts, such as the circumferential and radial dimensions, were taken as the analytical parameters.
Many useful results were obtained regarding the relationship between the range of local metal loss and the stress in annular plate. The “stress increase ratio” is defined in this study as the ratio of radial surface stress in an annular plate with metal loss to that without metal loss.
1) As the radial width of metal loss part decreases, the annular plate radial stress increases. The stress increase ratio is 1. 47 when the thickness of radial metal loss part of radial width 23mm is reduced to 16. 8mm from an original thickness of 21mm. 2) For a circumferential length of metal loss part of less than 2. 1m that is calculated by multiplying the radius of tank with the tank central angle of three degrees, the stress increases proportionally to the length of metal loss part. On the other hand, when the length is more than 2. 1m, the maximum stress has a tendency to saturate. 3) It is possible to estimate the radial stress occurred in metal loss part of annular plate by multiplying the stress value obtained in case without metal loss by the stress increase ratio.抄録全体を表示PDF形式でダウンロード (785K)
解説
-
宮内 昭浩2006 年 44 巻 6 号 p. 341-346
発行日: 2006年
公開日: 2007/01/10
ジャーナル フリーNano-scale patterns are easily fabricated by thermal nanoimprint technology. Thermoplastic materials are used for base materials so that wide application fields are expected. The nanoimprint equipment and formed fine structures are briefly reported. Bio application is also reported shortly.抄録全体を表示PDF形式でダウンロード (1493K) -
第3報 FEM解析例による減肉評価法の比較大野 敦史, 宇野 義明, 田原 隆康2006 年 44 巻 6 号 p. 347-356
発行日: 2006年
公開日: 2007/01/10
ジャーナル フリーThis is the third report (Part 3) in a series of interpretations of general and local metal loss assessment procedures specified in the Fitness-for-Service (FFS) assessment procedure developed by the PAJ⁄JPCA FFS task group based on API RP 579.
This report is aimed at understanding the safety margin for failure, as described in Section 5 (Local metal loss assessment in API RP 579, 2000) , by using a modeled pressure vessel. First, the cylindrical pressure vessel that has no corrosion allowance (nominal thickness=minimum required thickness) is modeled; further, the vessel is provided with a local metal loss that is equal to acceptable limits, as prescribed by the local metal loss assessment. Next, an FEM plastic analysis is performed for this modeled pressure vessel and the failure pressure is calculated.
It is found that the failure pressure of acceptable limits in Section 5 is 3. 4 times the designed pressure;further, approximately 90% of the pressure vessel exhibits no local metal loss.抄録全体を表示PDF形式でダウンロード (1243K)
講座
-
柴崎 敏和2006 年 44 巻 6 号 p. 357-361
発行日: 2006年
公開日: 2007/01/10
ジャーナル フリーGuide of RBI⁄RBM is open to the public by American Petroleum Institute (API) and Risk Based Inspection and Maintenance Procedures for European Industry (RIMAP) in the world. However, there is no guide of RBI⁄RBM for Japanese Industry. HPI established two working groups in 2002 to make Japanese version RBI⁄RBM guide and procedure guideline. One is WG1 for basic standard of RBI⁄RBM and the other is WG2 for actual procedure of RBI⁄RBM. As the beginning, WG1 reviewed the API RP 580, Draft of ASME Post-Construction Inspection Standard and General RIMAP Procedure. Then WG1 writes the draft of Japanese RBI⁄RBM Guide for Japanese Industry. Following that, WG1 continues working to develop RBI⁄RBM Guide by the end of March 2008.抄録全体を表示PDF形式でダウンロード (128K) -
政友 弘明2006 年 44 巻 6 号 p. 362-364
発行日: 2006年
公開日: 2007/01/10
ジャーナル フリーAmerican Petroleum Institute (API) proposed the first Risk Based Inspection (RBI) method for petroleum refinery industries in 1996. Since that time, the interest in RBI was growing also in Japan resulted that “RBM Specialty Study Committee” was built in High Pressure Institute of Japan (HPI) as the first Japanese study organization of Risk Based Maintenance (RBM) in 2001. HPI established two working groups in 2002to make Japanese version RBM guidelines. One is WG1 for basic standard of RBM and the other is WG2 for actual procedure of RBM. As the beginning, WG2 studied API Pub 581 mainly, especially Technical Module and made“Technical Module Handbook”in March 2004. Then WG2 studied the evaluation method of probability and consequence of failure and made “RBM Handbook” in March 2006. Following that, WG2 continues working to develop RBM Guideline by the end of March 2008.抄録全体を表示PDF形式でダウンロード (96K)
報告
-
原稿種別: 報告
2006 年 44 巻 6 号 p. 370-375
発行日: 2006/11/25
公開日: 2013/01/18
ジャーナル フリーPDF形式でダウンロード (35K)
- |<
- <
- 1
- >
- >|