報告書番号

383053

タイトル（和文）

円形断面部材で構成された骨組構造物の波力に対する動的挙動の検討

タイトル（英文）

DYNAMIC INTERACTION FOR OFF-SHORE STRUCTURESCONSISTING OF CYLINDRICAL MEMBERS

概要 （図表や脚注は「報告書全文」に掲載しております）

種々の海洋構造物が構造されるようになって既に１５～２０年以上になり，近年特に海洋スペースの有効利用が考えられている。当所は海上立地方式の原子力発電所の検討を始め，４形式を選定し，それらの経済性比較等を行っている。本報告は，種々の海洋構造物に関連する円形断面部材で構成された骨組構造物について，動的挙動を検討したものである。即ち，波力の評価式（物体の動きを考慮したモリソン式，ストークス波とクノイド波の式）と骨組み構造の運動方程式を組み合わせた解析手法による値と実験値との対比を通して，波の理論式，支持条件，構造形状の違いによる応答特性の相違を考察しつつ解析法の妥当性を確認する。さらに，実規模の海洋構造物の波力に対する応答解析を行い，その動的特性を検討したものである。

概要 （英文）

MORE THAN 15 20 YEARS HAVE PASSED SINCE THE IMPORTANCE OF EXPLOITATION OF THE OCEAN WERE POINTED OUT AND VARIOUS TYPES OF OFF-SHORE STRUCTURES WERE CONSTRUCTED.AS AGAINST THE MAIN PURPOSE OF THE OCEAN EXPLOITATION WAS CONSIDERED AS THE EXPLORATION AND USE OF THE VAST NATURAL RESOURCES LOCATED BENEATH OCEAN WATER,PRACTICAL USE OF OCEAN SPACE HAVE GOT INTO THE SPOT LIGHT IN RECENT YEARS.AS LOCATIONOF THE CONSTRUCTION SITE OF NUCLEAR POWER PLANTS HAD MANY DIFFICULT PROBLEMS TO SLOVE,OCEAN LOCATED NUCLEAR POWER PLANTS HAVE BEEN CONSIDERED. IN THE PRESENT SITUATION,CRIEPI STARTED TO INVESTIGATE THE CEAN LOCATED PLANTS AND SELECTED FOUR LOCATION TYPES.FLOATING TYPE IS ONE OF THE FOUR,AND SEISMIC INVESTIGATION OF FLOATING STRUCTURES IS RECOGNIZED AS THE MOST IMPORTANT PROBLEM. THE PURPOSE OF THIS REPORT IS TO INVESTIGATE DYNAMIC INTERACTION FOR OFF-SHORE STRUCTURES CONSISTING OF CYLINDRICAL MEMBERS IN ADVANCE OF THE INVESTIGATION OF FLOATING STRUCTURES.THROUGH THE COMPARISON BETWEEN EXPERIMENTAL RESULTS AND NUMERICAL RESULTS BASED ON MORISON S FORMULA,STOKES AND CNOIDAL WAVE THEORIES AND EQUATIONS OF MOTION ON FRAME STRUCTURES,CHARACTERISTICS OF DYNAMIC INTERACTION ARE DISCUSSED AND AVAILABILITY OF THE NUMERICAL METHOD IS CONFIRMED.FURTHERMORE,EXECUTING DYNAMIC RESPONSE ANALYSES OF ACTUAL SIZE OFF-SHORE STRUCTURE IN TWO KINDS OF WAVES,THE CHARACTERISTICS OF THE STRUCTURE ARE DISCUSSED BRIEFLY.

報告者

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