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Design of drum centrifuge with two-directional shaking

双向振荡转鼓离心机的设计

基本信息

批准号：
08555124
负责人：
KUSAKABE Osamu
金额：
$ 9.66万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

Physical modeling is an area of rapid development in geotechnical engineering field, in which drum centrifuge has unique advantages over beam type centrifuge and various possibilities have been explored. Head investigator has experiences of designing two drum centrifuges at the University of Utsunomiya and has been working on the development of drum centrifuge for geotechnical teaching, collaboration with Cambridge University since 1991 and the first version has been operating at Hiroshima University since 1994. This research project aims to design and install a 1.2 m diameter drum centrifuge at the Tokyo Institute of Technology and to develop a two -directional shaking capability.The main outcomes of the research project are the development of model ground construction methods and various actuators working at the drum centrifuge. The methods of model ground construction included, sand ground, undisturbed ground, clay ground, clay ground improved by sand compaction piles, and alternate layers ground of bentonite and sand. The actuators developed in this project include push-in and pull-out loading systems and wave generators. For the possible design strategies for two-directional shaking were proposed. Based on the past experiences of horizontal shaker developed at the Utsunomiya University and the concept of bumpy road system developed for arm type centrifuge, the device for creating a series of impact on the rotating drum was designed and manufactured. It was clear that due to large energy of rotating drum, distinguishable vertical component did not occur.

物理建模是岩土工程领域快速发展的一个领域，其中鼓式离心机相对于梁式离心机具有独特的优势，并探索了多种可能性。首席研究员有在宇都宫大学设计两台鼓式离心机的经验，自1991年以来一直致力于开发用于岩土工程教学的鼓式离心机，自1991年以来与剑桥大学合作，第一版离心机自1994年以来一直在广岛大学运行。本研究项目旨在设计和安装东京工业大学直径1.2米的鼓式离心机，并开发双向振动能力。研究项目的主要成果是开发了模型地面施工方法和各种筒式离心机的执行机构。模型地基的施工方法包括：砂土地基、原状地基、粘土地基、压砂桩加固粘土地基、膨润土与砂土交替层地基。在这个项目中开发的执行器包括推入和拉出加载系统和波浪发生器。针对双向振动问题，提出了可能的设计策略。根据宇都宫大学以往研制卧式振动筛的经验，结合臂式离心机研制的颠簸路面系统的概念，设计制造了对旋转滚筒产生一系列冲击的装置。很明显，由于旋转滚筒的能量大，没有出现可区分的垂直分量。