JP2008524065A - 形状を変えるモジュール式エネルギ吸収体及びこれを構成する方法 - Google Patents
形状を変えるモジュール式エネルギ吸収体及びこれを構成する方法 Download PDFInfo
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Abstract
【選択図】図1c
Description
・所定の空間的な制約と所望のエネルギ吸収基準とに従って1又はそれ以上のエネルギ吸収ユニットを選択するステップ;
・予め規定された形状を有するエネルギ吸収ユニットを統合する手段を設けるステップ;
・1又はそれ以上のエネルギ吸収ユニットが、入射する物体とエネルギ吸収体との相対運動の前後及び相対運動時に互いに適切な位置に置かれるように、エネルギ吸収ユニットを統合する手段に関する1又はそれ以上のエネルギ吸収ユニットを設置するステップ;
・壁が上側周部、下側周部、及びそれらの間を延びる中間部を具えるように、いくつかの1又はそれ以上のエネルギ吸収ユニットの中に壁を設けるステップ;
・エネルギ吸収ユニットの少なくともいくつかに、縁部又は上側周部と第1のフロアとの間を延びて火山−又はクレータ状のドームを形成する第1及び第2の壁を設けるステップ;
・壁の中に所定数(m個、mは0,1,2,3,...,1000からなる1群から選択される整数)の切れ目を規定するステップ;
・エネルギ吸収ユニットを統合する手段の中に規定される所定数(n個、nは0,1,2,3,...,1000からなる1群から選択される整数)の開口を設けるステップ;である。
ある好適な(しかし唯一ではない)製造方法は、熱成形によるものである。熱成形が、熱したプラスチックのシート材を工具によって一定の厚さに延ばして所望の部品形状にする工程を含むことが知られている。延ばす工程により、シート材を薄型化して、最終的にはその部品の中が非均一な厚さ分布となる。
開示されたエネルギ吸収体を熱成形により比較的低コストで製造できて、費用の掛かる工程の改良をしないで、約50mm以下の高さにおける衝撃性能を最適化できる。しかしながら、このような高さを越えると、適切な衝突抵抗のためにエネルギ吸収を引き起こすのに要するベースの材料の厚さを、インライン熱成形機械を用いて容易にしかも安価に提供できなくなる。このような事情により、射出成形した吸収体を、おそらく低コストで製造できる。
試験は、所定の吸収体(例えば、ポリプロピレン製の:Basell Pro−fax SV 152)構成の抵抗特性を予測して、自動車の側面衝突の所定の対応策である既知の評価基準(80psi以上)に適合するよう、その形状を効果的に調整又は最適化するために実施される。
モデルのコーン材:Pro−fax SV 152 PP;Cycolac
EX75 ABS,Cycolac MC8800,Cycoloy IP
1000
歪み速度依存性は、準静的な動作を反映するようモデル化していない
剛体平面に接触させてコーンを支持する
コーンの形状−10°の抜き勾配、上部の直径は15mm;畝部は無し
衝撃速度=シミュレーションの実行時間を減らすため33 mph(FMV
SS214 合成スピード)
圧力計算を行う領域=衝突して1つのコーンのみに影響を及ぼすことのでき
る最大領域。−モデルの基部で仮定した領域(直径64mm)
生データは、(他のフィルタは、平滑化し過ぎるため)SAE1000でフ
ィルタリングされる
変数: 衝撃角 (0°,14°,27°)
部品の厚さ (1.25mm,1.6mm,2.
0mm)
コーンの壁の中の75mm長のスリットの数(0,1,2,4)
コーンの中の畝部の高さ (0,1.25mm,2.5mm)
列数: 108(フル・ファクトリアル、Full Factorial)
測定: 衝突体に加えられるピーク圧力
事象全体における衝突体に加えられる平均圧力
事象全体における圧力の標準偏差
コーンの重量
温度: 室温(温度の影響は考慮しない)
結果の解析: Altair Hyperworks(登録商標)製パッケージ・ソフト ウェアを用いたDOE前後のプロセス
LS−DYNA3D(登録商標)の非線形有限要素法で実行するシミュレ ーション
JMP統計ソフトウェアを使用した結果の解析−主要な効果及び相互作用
のスクリーニング効果
伝達関数の段階的な逆回帰
Claims (23)
- 1又はそれ以上のエネルギ吸収モジュールを具えるモジュール式エネルギ吸収体であって、
前記1又はそれ以上のエネルギ吸収モジュールが、
前記1又はそれ以上のエネルギ吸収モジュールに規定された所定数(n個、nは0以上の整数)の開口を含む構成を有する前記1又はそれ以上のモジュールのエネルギ吸収ユニットを統合する手段と、
前記統合する手段と関連した1又はそれ以上のエネルギ吸収ユニットとを有し、
前記統合する手段が、入射する物体と前記エネルギ吸収体とが相対運動する際及びその前後に、前記1またはそれ以上のユニットを互いに適切な位置に位置決めすることで、生じた衝撃力が前記エネルギ吸収ユニットによって少なくとも部分的に吸収され、
少なくとのいくつかの前記ユニットが、上側周部(upper perimeter)と、下側周部(lower perimeter)と、これらの間に延在する中間壁と、衝撃前に前記中間壁に規定されている所定数(m個、nは0以上の整数)の切れ目とを有し、
前記壁が、吸収時に少なくとも一部が潰れるよう構成され、
上壁が前記上側周部から延びており、前記中間壁及び前記上壁の一方又は双方が各壁に関する変形特性に従って少なくとも一部が潰れ、
少なくともいくつかの前記エネルギ吸収ユニットが、それらの中間壁及び上壁が衝撃力の主要な入射成分に対して各々α及びβの角度で傾斜するよう向いており、
少なくともいくつかの前記エネルギ吸収ユニットが結合して、衝撃力を与える物体が減速するよう相互に支持することを特徴とするモジュール式エネルギ吸収体。 - さらに、可動部を有するヒンジ部を具え、
各可動部が、前記吸収体を設置する環境によって強いられる空間的な制約の中に前記吸収体を構成するように、1又はそれ以上の前記統合する手段の1から延びており、
前記環境が、車両の天井部、バンパーアッセンブリ、ニー・ボルスター(knee bolster)、車両のピラーを含む側面衝突部位、肘掛け、及びドアからなる群の中から選択されることを特徴とする請求項1に記載のモジュール式エネルギ吸収体。 - 前記開口の数(n)がゼロに等しいことを特徴とする請求項1に記載のモジュール式エネルギ吸収体。
- 前記統合する手段が、膜、ロープ(tether)、ヒンジ、平面、畝部、溝部、非平面、及びこれらの組み合わせからなる群から選択される構造を具えることを特徴とする請求項1に記載のモジュール式エネルギ吸収体。
- 少なくとも1の前記1又はそれ以上のエネルギ吸収ユニットが、上壁の対向面の間を少なくとも部分的に延びるフロアを有することを特徴とする請求項1に記載のモジュール式エネルギ吸収体。
- 前記フロアが環状であることを特徴とする請求項5に記載のモジュール式エネルギ吸収体。
- 前記フロアが前記上側周部の中を延びていることを特徴とする請求項5に記載のモジュール式エネルギ吸収体。
- 前記フロアが非平面の形状を有することを特徴とする請求項5に記載のモジュール式エネルギ吸収体。
- 前記フロアが、1又はそれ以上の層を具えるウエディングケーキ形状に構成されていることを特徴とする請求項5に記載のモジュール式エネルギ吸収体。
- 前記フロアが、そこに規定された1又はそれ以上のクレータを有する火山形状に構成されていることを特徴とする請求項5に記載のモジュール式エネルギ吸収体。
- 前記1又はそれ以上のエネルギ吸収ユニットのいくつかが、仮想の対称軸を有し、
前記フロアの少なくとも1区間が前記対称軸に対して傾いていることを特徴とする請求項5に記載のモジュール式エネルギ吸収体。 - 反発した後の解放構成が衝突前の非変形構成と実質的に同じ位置に設けられていることを特徴とする請求項1に記載のモジュール式エネルギ吸収体。
- 前記中間壁が、前記上側周部と下側周部との間に非均一の厚さを有することを特徴とする請求項1に記載のモジュール式エネルギ吸収体。
- 前記上壁が、前記上側周部と前記フロアとの間に非均一の厚さを有することを特徴とする請求項5に記載のモジュール式エネルギ吸収体。
- 所定のエネルギ吸収ユニットの前記中間壁が、別のエネルギ吸収ユニットに関する壁の平均厚さ(t2)とは異なる平均厚さ(t1)を有することを特徴とする請求項13に記載のモジュール式エネルギ吸収体。
- 所定のエネルギ吸収ユニットの前記上壁が、別のエネルギ吸収ユニットに関する上壁の平均厚さとは異なる平均厚さを有することを特徴とする請求項14に記載のモジュール式エネルギ吸収体。
- 各対称軸が、所定の面に交差する軌跡の位置を規定しており、
この平面において隣接する軌跡に繋がる線が、線分、円形、卵形、長円形、楕円形、正方形、菱形、四辺形、及び多角形からなる群の中から選択される幾何学的図形を描くことを特徴とする請求項11に記載のモジュール式エネルギ吸収体。 - エネルギ吸収ユニットの下側周部が、円形、卵形、長円形、扁平長円形、多角形、及び楕円形からなる群の中から選択される幾何学的図形を規定することを特徴とする請求項1に記載のモジュール式エネルギ吸収体。
- エネルギ吸収ユニットの上側周部が、円形、卵形、長円形、扁平長円形、多角形、及び楕円形からなる群の中から選択される幾何学的図形を規定することを特徴とする請求項1に記載のモジュール式エネルギ吸収体。
- 中間部が、円形、卵形、長円形、扁平長円形、多角形、及び楕円形からなる1群の中から選択される幾何学的図形を規定することを特徴とする請求項1に記載のモジュール式エネルギ吸収体。
- 前記エネルギ吸収モジュールの2又はそれ以上が、積層構成で配置されており、
前記吸収体が、さらに、前記2又はそれ以上のエネルギ吸収モジュールの衝撃抵抗特性を結合する手段を有することを特徴とする請求項1に記載のモジュール式エネルギ吸収体。 - 空間的な制約及び所望のエネルギ吸収基準に従ってエネルギ吸収モジュールの中から1又はそれ以上のエネルギ吸収ユニットを選択するステップと、
予め規定された形状を有するエネルギ吸収ユニットを統合する手段を設けるステップと、
前記1又はそれ以上のエネルギ吸収ユニットが、入射する物体と前記エネルギ吸収体との相対運動の前後及び相対運動時に互いに適切な位置に置かれるように、前記エネルギ吸収ユニットを統合する手段に関する1又はそれ以上のエネルギ吸収ユニットを設置するステップと、
前記壁の中に所定数(m個、mは0,1,2,3,...,1000からなる群から選択される整数)の切れ目を規定するステップと、
肉厚の分布を決定するステップと、
前記エネルギ吸収ユニットを統合する手段の中に規定される所定数(n個、nは0,1,2,3,...,1000からなる群から選択される整数)の開口を設けるステップと、
前記モジュール式エネルギ吸収構造の理論的なエネルギ吸収特性を推測するステップと、
前記理論的な特性を所望の特性と比較するステップと、
必要に応じて反復するステップと、
を具えることを特徴とする請求項1に記載のモジュール式エネルギ吸収体の構成方法。 - さらに、前記上側周部から延びる上壁によって支持されたフロアを設けるステップを具えており、
前記上壁が、前記中間壁に関するエネルギ吸収特性を統合するエネルギ吸収特性を与えるよう選択された寸法を有することを特徴とする請求項22に記載の方法。
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US11/014,418 US7404593B2 (en) | 2000-02-07 | 2004-12-16 | Modular energy absorber of varying topography and method for configuring same |
PCT/US2005/044896 WO2006065731A2 (en) | 2004-12-16 | 2005-12-12 | Modular energy absorber and configuring method |
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2004
- 2004-12-16 US US11/014,418 patent/US7404593B2/en not_active Expired - Lifetime
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2005
- 2005-12-12 KR KR1020077015551A patent/KR100948458B1/ko not_active IP Right Cessation
- 2005-12-12 WO PCT/US2005/044896 patent/WO2006065731A2/en active Application Filing
- 2005-12-12 JP JP2007546805A patent/JP2008524065A/ja active Pending
- 2005-12-12 CA CA2590695A patent/CA2590695C/en active Active
- 2005-12-12 EP EP05853742A patent/EP1716019A4/en not_active Ceased
- 2005-12-12 AU AU2005316696A patent/AU2005316696A1/en not_active Abandoned
Cited By (8)
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JP2010235002A (ja) * | 2009-03-31 | 2010-10-21 | Kyoraku Co Ltd | 車両用空調ダクト |
JP4448938B1 (ja) * | 2009-05-22 | 2010-04-14 | 株式会社ホワイトインパクト | 樹脂シートの成形品 |
JP2010270863A (ja) * | 2009-05-22 | 2010-12-02 | White Impact Co Ltd | 樹脂シートの成形品 |
US8118347B2 (en) | 2009-06-05 | 2012-02-21 | Toyota Boshoku Kabushiki Kaisha | Structure of mounting impact absorption material for use with vehicle |
WO2019167807A1 (ja) * | 2018-03-01 | 2019-09-06 | マツダ株式会社 | 車両用内装構造 |
JP2019151162A (ja) * | 2018-03-01 | 2019-09-12 | マツダ株式会社 | 車両用内装構造 |
CN111788091A (zh) * | 2018-03-01 | 2020-10-16 | 马自达汽车株式会社 | 车辆用内装构造 |
JP7169529B2 (ja) | 2018-03-01 | 2022-11-11 | マツダ株式会社 | 車両用内装構造 |
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US20050161982A1 (en) | 2005-07-28 |
WO2006065731A2 (en) | 2006-06-22 |
EP1716019A2 (en) | 2006-11-02 |
CA2590695C (en) | 2011-07-12 |
US7404593B2 (en) | 2008-07-29 |
KR20070104887A (ko) | 2007-10-29 |
EP1716019A4 (en) | 2008-08-20 |
WO2006065731B1 (en) | 2007-09-27 |
CA2590695A1 (en) | 2006-06-22 |
KR100948458B1 (ko) | 2010-03-17 |
WO2006065731A3 (en) | 2007-04-19 |
AU2005316696A1 (en) | 2006-06-22 |
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