JP2007148763A - Vibration damping unit - Google Patents

Vibration damping unit Download PDF

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JP2007148763A
JP2007148763A JP2005342080A JP2005342080A JP2007148763A JP 2007148763 A JP2007148763 A JP 2007148763A JP 2005342080 A JP2005342080 A JP 2005342080A JP 2005342080 A JP2005342080 A JP 2005342080A JP 2007148763 A JP2007148763 A JP 2007148763A
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rack
weight
vibration
support body
damping unit
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JP4327790B2 (en
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Yoji Hidaka
洋士 日高
Yasushi Uraki
靖司 浦木
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Fujitsu Ltd
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Fujitsu Ltd
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Priority to US11/357,122 priority patent/US20070119794A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
    • F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1485—Servers; Data center rooms, e.g. 19-inch computer racks
    • H05K7/1488—Cabinets therefor, e.g. chassis or racks or mechanical interfaces between blades and support structures
    • H05K7/1495—Cabinets therefor, e.g. chassis or racks or mechanical interfaces between blades and support structures providing data protection in case of earthquakes, floods, storms, nuclear explosions, intrusions, fire

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide countermeasures to vibration which can be easily adopted to an existing rack. <P>SOLUTION: A support body 21 in a vibration damping unit 14 is loaded on a rack 12 so as to be freely attachable and detachable. Therefore, the vibration damping unit 14 can be easily adopted to the existing rack 12 without making it necessary to perform any design change in the existing rack 12. When the support body 21 is loaded, it it not necessary to perform any largely scaled installation operation such as the movement of the rack 12. Also, a weight is supported so as to be movable along one virtual plane by the support body 21. The weight is moved back and forth along one virtual plane according to the operation of an elastic extensible member. For example, even when the shake of earthquake acts on the rack 12, the vibration of the rack 12 can be sufficiently suppressed according to the backward and forward movement of the weight. The deterioration of the rigidity of the rack 12 is permitted. The simplification of the assembly method of the rack 12 is achieved. The manufacturing costs of the rack 12 are reduced. At the same time, the deterioration of the rigidity of the rack 12 largely contributes to the weight reduction of the rack 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、例えばラックマウント型ディスクアレイ装置を収容するラックの振動対策に関する。   The present invention relates to measures against vibration of a rack that accommodates, for example, a rack mount disk array device.

ラックマウント型ディスクアレイ装置は広く知られる。ディスクアレイ装置はラックに搭載される。ラックは免震装置上に設置される。免震装置の働きでラックの揺れは低減される。ディスクアレイ装置は正常に動作し続ける。ラックの設置にあたってラックは免震装置上に持ち上げられる。
特開２００２−１６３７５号公報 特開平１１−８２６１７号公報 特開平０５−１４９０２８号公報 実公平０８−５２５２号公報 Rack mount disk array devices are widely known. The disk array device is mounted on a rack. The rack is installed on the seismic isolation device. Rack motion is reduced by the function of the seismic isolation device. The disk array device continues to operate normally. When installing the rack, the rack is lifted on the seismic isolation device.
JP 2002-16375 A JP-A-11-82617 JP 05-149028 A No. 08-5252

ラックの重量は少なくとも１５０ｋｇに達する。ラックにディスクアレイ装置が搭載されると、さらに重量は増加する。ラックは簡単に免震装置上に持ち上げられることはできない。しかも、こうした作業にあたってディスクアレイ装置の稼働は維持されることができない。ディスクアレイ装置の稼働が開始されると、ラックに振動対策は施されることができない。   The weight of the rack reaches at least 150 kg. When the disk array device is mounted on the rack, the weight further increases. The rack cannot be easily lifted onto the seismic isolation device. In addition, the operation of the disk array device cannot be maintained during such operations. When the operation of the disk array device is started, vibration countermeasures cannot be applied to the rack.

本発明は、上記実状に鑑みてなされたもので、既存のラックに簡単に採用されることができる振動対策を提供することを目的とする。   The present invention has been made in view of the above circumstances, and an object thereof is to provide a vibration countermeasure that can be easily adopted in an existing rack.

上記目的を達成するために、本発明によれば、ラックに着脱自在に搭載されるラックマウント型の支持体と、１仮想平面に沿って移動可能に支持体に支持される重りと、支持体および重りに連結される弾性伸縮部材とを備えることを特徴とする制振ユニットが提供される。   To achieve the above object, according to the present invention, a rack mount type support body that is detachably mounted on a rack, a weight that is supported by the support body so as to be movable along one virtual plane, and a support body And a elastic damping member connected to the weight.

こうした制振ユニットでは支持体はラックに着脱自在に搭載されることができる。したがって、既存のラックで何ら設計変更が施されることなく、制振ユニットは既存のラックに簡単に採用されることができる。搭載にあたって、ラックの移動といった大掛かりな設置作業は必要とされない。例えば記録媒体駆動装置の稼働が開始した後でも、ラックに振動対策は施されることができる。   In such a vibration control unit, the support can be detachably mounted on the rack. Therefore, the vibration control unit can be easily adopted in the existing rack without any design change in the existing rack. When mounting, large installation work such as rack movement is not required. For example, even after the operation of the recording medium driving device is started, a countermeasure against vibration can be applied to the rack.

支持体には１仮想平面に沿って移動可能に重りが支持される。支持体および重りは弾性伸縮部材で連結される。弾性伸縮部材の働きで重りは１仮想平面に沿って往復運動することができる。例えば地震の揺れがラックに作用しても、重りの往復運動でラックの振動は十分に抑制されることができる。その結果、ラックの剛性の低下は許容される。ラックの組立方法の簡素化は実現される。ラックの製造コストは低減されることができる。同時に、ラックの剛性の低下はラックの軽量化に大いに寄与することができる。   A weight is supported by the support so as to be movable along one virtual plane. The support and the weight are connected by an elastic elastic member. The weight can reciprocate along one virtual plane by the action of the elastic elastic member. For example, even when an earthquake shake acts on the rack, the vibration of the rack can be sufficiently suppressed by the reciprocating motion of the weight. As a result, a reduction in rack rigidity is allowed. Simplification of the rack assembly method is realized. The manufacturing cost of the rack can be reduced. At the same time, the reduction in the rigidity of the rack can greatly contribute to the weight reduction of the rack.

以上のような制振ユニットでは、重りは、仮想平面に沿って移動可能に支持体に連結されるトレイと、着脱自在にトレイに装着される１以上の重量体とを備えればよい。トレイには１以上の重量体が装着されることができる。したがって、重量体の数が調整されれば、重りの重量は調整されることができる。例えばラックの共振周波数に応じて重りの重量は調整されることができる。   In the vibration damping unit as described above, the weight may include a tray that is connected to the support body so as to be movable along a virtual plane, and one or more weight bodies that are detachably attached to the tray. One or more weight bodies can be mounted on the tray. Therefore, if the number of weight bodies is adjusted, the weight of the weight can be adjusted. For example, the weight of the weight can be adjusted according to the resonance frequency of the rack.

以上のように本発明によれば、既存のラックに簡単に採用されることができる振動対策が提供されることができる。   As described above, according to the present invention, it is possible to provide a countermeasure against vibration that can be easily adopted in an existing rack.

以下、添付図面を参照しつつ本発明の一実施形態を説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

図１はディスクアレイ装置１１を収容するラック１２の外観を概略的に示す。ラック１２には複数台のディスクアレイ装置１１が搭載される。ディスクアレイ装置１１は、例えば同様にラック１２に搭載される上位ホストすなわちサーバコンピュータ装置１３に接続される。ディスクアレイ装置１１は、サーバコンピュータ装置１３から供給される指令に基づき動作する。   FIG. 1 schematically shows the appearance of a rack 12 that houses a disk array device 11. A plurality of disk array devices 11 are mounted on the rack 12. The disk array device 11 is connected to, for example, an upper host, that is, a server computer device 13 that is similarly mounted on the rack 12. The disk array device 11 operates based on a command supplied from the server computer device 13.

ディスクアレイ装置１１内には、周知の通り、複数台の記録ディスク駆動装置すなわちハードディスク駆動装置（ＨＤＤ）が収容される。ＨＤＤでは、記録ディスクすなわちハードディスク（ＨＤ）の回転軸は、例えば床面に直交する垂直方向に延びる。ここでは、各ディスクアレイ装置１１内には例えば１５台のＨＤＤが収容される。ただし、ＨＤの回転軸は水平方向でもよい。   As is well known, a plurality of recording disk drive devices, that is, hard disk drive devices (HDDs) are accommodated in the disk array device 11. In the HDD, the rotation axis of a recording disk, that is, a hard disk (HD) extends, for example, in a vertical direction orthogonal to the floor surface. Here, for example, 15 HDDs are accommodated in each disk array device 11. However, the rotation axis of HD may be in the horizontal direction.

ラック１２の最上段には制振ユニット１４が搭載される。制振ユニット１４は水平面に沿ってラック１２の前後方向にスライド移動することができる。こうして制振ユニット１４はラック１２の正面から引き出されることができる。制振ユニット１４はラック１２内で固定される。固定にあたって例えばねじ１５が用いられればよい。ねじ１５は例えばラック１２の支柱にねじ込まれればよい。   A vibration damping unit 14 is mounted on the uppermost stage of the rack 12. The damping unit 14 can slide in the front-rear direction of the rack 12 along the horizontal plane. In this way, the vibration control unit 14 can be pulled out from the front of the rack 12. The damping unit 14 is fixed in the rack 12. For example, a screw 15 may be used for fixing. For example, the screw 15 may be screwed into a column of the rack 12.

図２に示されるように、制振ユニット１４はラックマウント型の支持体２１を備える。支持体２１は、底板２１ａと、底板２１ａの周縁から立ち上がる周壁２１ｂとから構成される。底板２１ａおよび周壁２１ｂに基づき支持体２１は例えば平たい直方体の収容空間を区画する。   As shown in FIG. 2, the vibration control unit 14 includes a rack mount type support body 21. The support 21 includes a bottom plate 21a and a peripheral wall 21b that rises from the periphery of the bottom plate 21a. Based on the bottom plate 21a and the peripheral wall 21b, the support 21 defines, for example, a flat rectangular parallelepiped housing space.

支持体２１の収容空間には第１方向ＦＤに延びる１対の第１レール２２、２２が配置される。第１方向ＦＤは水平面に沿って制振ユニット１４の左右方向で規定される。第１レール２２、２２同士は相互に平行に延びる。第１レール２２は支持体２１の底板２１ａに固定されればよい。固定にあたって例えばねじが用いられればよい。   A pair of first rails 22 and 22 extending in the first direction FD are disposed in the accommodation space of the support 21. The first direction FD is defined by the left-right direction of the vibration control unit 14 along the horizontal plane. The first rails 22 and 22 extend in parallel to each other. The first rail 22 may be fixed to the bottom plate 21 a of the support 21. For example, a screw may be used for fixing.

第１レール２２にはスライダ２３が装着される。スライダ２３は第１レール２２に沿って第１方向ＦＤに移動することができる。スライダ２３、２３には第２レール２４が連結される。第２レール２４はスライダ２３に固定されればよい。第２レール２４は、第１方向ＦＤに直交する第２方向ＳＤに延びる。第２方向ＳＤは水平面に沿って制振ユニット１４の前後方向で規定される。第２レール２４に基づきスライダ２３、２３同士は連結される。   A slider 23 is attached to the first rail 22. The slider 23 can move in the first direction FD along the first rail 22. A second rail 24 is connected to the sliders 23, 23. The second rail 24 may be fixed to the slider 23. The second rail 24 extends in the second direction SD orthogonal to the first direction FD. The second direction SD is defined by the front-rear direction of the damping unit 14 along the horizontal plane. The sliders 23 are connected to each other based on the second rail 24.

第２レール２４にはトレイ２５が装着される。トレイ２５は第２レール２４に沿って第２方向ＳＤに移動することができる。トレイ２５には例えば１以上の重量体２６が装着される。重量体２６は、例えば底板２１ａの表面で規定される１仮想平面に沿って移動可能に支持体２１に連結される。重量体２６はトレイ２５に着脱自在に取り付けられればよい。取り付けにあたって例えばねじが用いられればよい。１つの重量体２６の重量は例えば１ｋｇに設定されればよい。なお、トレイ２５および重量体２６は本発明の重りを構成する。   A tray 25 is attached to the second rail 24. The tray 25 can move in the second direction SD along the second rail 24. For example, one or more weight bodies 26 are attached to the tray 25. For example, the weight body 26 is connected to the support body 21 so as to be movable along one virtual plane defined by the surface of the bottom plate 21a. The weight body 26 may be detachably attached to the tray 25. For example, screws may be used for attachment. The weight of one weight body 26 may be set to 1 kg, for example. The tray 25 and the weight body 26 constitute a weight of the present invention.

支持体２１の収容空間には個々の第１レール２２に並列に延びる第１コイルばね２７および第１ダンパ２８が組み込まれる。底板２１ａには、第１方向ＦＤに相互に離れる１対の突片２９、２９が形成される。第１コイルばね２７および第１ダンパ２８は突片２９、２９同士の間に直列に配置される。   A first coil spring 27 and a first damper 28 extending in parallel to the individual first rails 22 are incorporated in the accommodation space of the support body 21. The bottom plate 21a is formed with a pair of projecting pieces 29 and 29 that are separated from each other in the first direction FD. The first coil spring 27 and the first damper 28 are arranged in series between the projecting pieces 29 and 29.

第１コイルばね２７および第１ダンパ２８の間には前述のスライダ２３が配置される。第１コイルばね２７は、一端でスライダ２３に連結され、他端で一方の突片２９に連結される。スライダ２３は、第１コイルばね２７の働きに基づき設定された周期で第１レール２２上を往復運動する。同様に、第１ダンパ２８は、一端でスライダ２３に連結され、他端で他方の突片２９に連結される。第１ダンパ２８の働きでスライダ２３の往復運動は減衰する。   The slider 23 is disposed between the first coil spring 27 and the first damper 28. The first coil spring 27 is connected to the slider 23 at one end, and is connected to one projecting piece 29 at the other end. The slider 23 reciprocates on the first rail 22 with a period set based on the action of the first coil spring 27. Similarly, the first damper 28 is connected to the slider 23 at one end and to the other protruding piece 29 at the other end. The reciprocating motion of the slider 23 is attenuated by the action of the first damper 28.

同様に、支持体２１の収容空間には第２レール２４に並列に延びる１対の第２コイルばね３１、３１が組み込まれる。第２コイルばね３１、３１は１対のスライダ２３、２３同士の間に直列に配置される。支持体２１の収容空間には第２レール２４に並列に延びる１対の第２ダンパ３２、３２が組み込まれる。第２ダンパ３２、３２は１対のスライダ２３、２３同士の間に直列に配置される。   Similarly, a pair of second coil springs 31 and 31 extending in parallel with the second rail 24 are incorporated in the accommodation space of the support body 21. The second coil springs 31, 31 are arranged in series between the pair of sliders 23, 23. A pair of second dampers 32, 32 extending in parallel with the second rail 24 are incorporated in the accommodation space of the support 21. The second dampers 32 and 32 are arranged in series between the pair of sliders 23 and 23.

第２コイルばね３１、３１同士の間、および、第２ダンパ３２、３２同士の間には前述のトレイ２５が配置される。第２コイルばね３１は、一端でスライダ２３に連結され、他端でトレイ２５に連結される。第２コイルばね３１の働きに基づきトレイ２５は、設定された周期で第２レール２４上を往復運動する。同様に、第２ダンパ３２は、一端でスライダ２３に連結され、他端でトレイ２５に連結される。第２ダンパ３２の働きでトレイ２５の往復運動は減衰する。   The aforementioned tray 25 is disposed between the second coil springs 31 and 31 and between the second dampers 32 and 32. The second coil spring 31 is connected to the slider 23 at one end and to the tray 25 at the other end. Based on the action of the second coil spring 31, the tray 25 reciprocates on the second rail 24 at a set cycle. Similarly, the second damper 32 is connected to the slider 23 at one end and connected to the tray 25 at the other end. The reciprocating motion of the tray 25 is damped by the action of the second damper 32.

図３に示されるように、第１コイルばね２７や第１ダンパ２８はスライダ２３や突片２９から取り外されることができる。同様に、第２コイルばね３１や第２ダンパ３２はスライダ２３やトレイ２５から取り外されることができる。重量体２６はトレイ２５から取り外されることができる。こうして第１および第２コイルばね２７、３１や第１および第２ダンパ２８、３２、重量体２６は簡単に交換されることができる。   As shown in FIG. 3, the first coil spring 27 and the first damper 28 can be detached from the slider 23 and the protruding piece 29. Similarly, the second coil spring 31 and the second damper 32 can be removed from the slider 23 and the tray 25. The weight body 26 can be removed from the tray 25. Thus, the first and second coil springs 27 and 31, the first and second dampers 28 and 32, and the weight body 26 can be easily replaced.

ラック１２の静止時、図２に示されるように、重量体２６は基準位置に位置決めされる。基準位置では、トレイ２５は第１レール２２、２２同士の間の中間位置に位置決めされる。同時に、スライダ２３は第１レール２２の両端同士の間の中間位置に位置決めされる。第１および第２コイルばね２７、３１や第１および第２ダンパ２８、３２には負荷は作用しない。第１および第２コイルばね２７、３１や第１および第２ダンパ２８、３２は原形の長さで保持される。   When the rack 12 is stationary, the weight body 26 is positioned at the reference position as shown in FIG. At the reference position, the tray 25 is positioned at an intermediate position between the first rails 22 and 22. At the same time, the slider 23 is positioned at an intermediate position between both ends of the first rail 22. No load acts on the first and second coil springs 27 and 31 and the first and second dampers 28 and 32. The first and second coil springs 27 and 31 and the first and second dampers 28 and 32 are held at the original length.

いま、例えば地震に基づきラック１２に第２方向ＳＤに横揺れが作用すると、図４および図５に示されるように、制振ユニット１４では水平面に沿って支持体２１とトレイ２５との間で相対移動が生じる。トレイ２５はその場に留まろうとする。支持体２１は第２方向ＳＤに往復移動する。その結果、第２コイルばね３１、３１は伸縮する。ラック１２および支持体２１の振動の振幅は抑制される。抑制された振幅のエネルギーは第２コイルばね３１に蓄積される。蓄積された振幅のエネルギーは第２ダンパ３２、３２の働きで開放される。こうしてラック１２の振動は抑制される。   Now, for example, when a roll is applied to the rack 12 in the second direction SD due to an earthquake, as shown in FIGS. 4 and 5, the vibration control unit 14 moves between the support 21 and the tray 25 along the horizontal plane. Relative movement occurs. The tray 25 tries to stay in place. The support 21 reciprocates in the second direction SD. As a result, the second coil springs 31, 31 expand and contract. The amplitude of vibration of the rack 12 and the support 21 is suppressed. The suppressed amplitude energy is stored in the second coil spring 31. The stored amplitude energy is released by the action of the second dampers 32 and 32. Thus, vibration of the rack 12 is suppressed.

以上のような制振ユニット１４は、ディスクアレイ装置１１と同様に、着脱自在にラック１２に搭載されることができる。したがって、既存のラック１２で何ら設計変更が施されることなく、制振ユニット１４は既存のラック１２に簡単に採用されることができる。搭載にあたって、ラック１２の移動といった大掛かりな設置作業は必要とされない。しかも、ラック１２のディスクアレイ装置１１の稼働が開始した後でも、振動対策は施されることができる。   The vibration control unit 14 as described above can be detachably mounted on the rack 12 in the same manner as the disk array device 11. Therefore, the vibration damping unit 14 can be easily adopted in the existing rack 12 without any design change in the existing rack 12. In mounting, large installation work such as movement of the rack 12 is not required. In addition, even after the operation of the disk array device 11 in the rack 12 has started, vibration countermeasures can be taken.

また、制振ユニット１４の働きでラック１２の振動は十分に抑制されることから、ラック１２の剛性の低下は許容される。溶接からリベットへの変更といったラック１２の組立方法の簡素化が実現されることができる。ラック１２の製造コストは低減されることができる。同時に、ラック１２の剛性の低下はラック１２の軽量化に大いに寄与することができる。   Further, since the vibration of the rack 12 is sufficiently suppressed by the action of the vibration control unit 14, a reduction in the rigidity of the rack 12 is allowed. Simplification of the method of assembling the rack 12 such as changing from welding to rivet can be realized. The manufacturing cost of the rack 12 can be reduced. At the same time, the reduction in the rigidity of the rack 12 can greatly contribute to the weight reduction of the rack 12.

さらにまた、第１および第２コイルばね２７、３１や第１および第２ダンパ２８、３２、重量体２６は簡単に取り外されることができる。したがって、ラック１２や制振ユニット１４の共振周波数に応じて第１および第２コイルばね２７、３１のばね定数は調整されることができる。同様に、第１および第２ダンパ２８、３２のダンパ定数は調整されることができる。重りの重量は調整されることができる。   Furthermore, the first and second coil springs 27 and 31, the first and second dampers 28 and 32, and the weight body 26 can be easily removed. Therefore, the spring constants of the first and second coil springs 27 and 31 can be adjusted according to the resonance frequency of the rack 12 and the vibration damping unit 14. Similarly, the damper constants of the first and second dampers 28, 32 can be adjusted. The weight of the weight can be adjusted.

本発明者らはソフトウェア解析に基づき制振ユニット１４の効果を検証した。検証にあたって、図６に示されるように、ラック１２の解析モデル４１が定義された。解析モデル４１では、ラック４２は、４本の支柱４３と、支柱４３を連結する上段および下段枠体４４とから構成された。上段枠体４４は支柱４３の上端に配置された。下段枠体４４は支柱の下端に近接して配置された。   The inventors verified the effect of the vibration control unit 14 based on software analysis. In the verification, an analysis model 41 of the rack 12 was defined as shown in FIG. In the analysis model 41, the rack 42 includes four support columns 43 and upper and lower frame bodies 44 that connect the support columns 43. The upper frame body 44 was disposed at the upper end of the column 43. The lower frame 44 was disposed close to the lower end of the column.

ここでは、支柱４３のｚ軸方向の高さは１８００［ｍｍ］に設定された。上段および下段枠体４４のｘ軸方向の長さは６００［ｍｍ］に設定された。上段および下段枠体４４のｙ軸方向の長さは９５０［ｍｍ］に設定された。下段枠体４４の下端は支柱４３の下端から５０［ｍｍ］の高さに配置された。支柱４３の下端の移動は拘束された。なお、ラック４２の重量は１５０ｋｇに設定された。ラック４２のヤング率は１９３１９８［ＭＰａ］に設定された。ラック４２のポアソン比は０．３に設定された。   Here, the height of the column 43 in the z-axis direction was set to 1800 [mm]. The length of the upper and lower frame bodies 44 in the x-axis direction was set to 600 [mm]. The length of the upper and lower frame bodies 44 in the y-axis direction was set to 950 [mm]. The lower end of the lower frame 44 was arranged at a height of 50 [mm] from the lower end of the column 43. The movement of the lower end of the column 43 was restrained. The weight of the rack 42 was set to 150 kg. The Young's modulus of the rack 42 was set to 193198 [MPa]. The Poisson's ratio of the rack 42 was set to 0.3.

図６から明らかなように、上段枠体４４には前述の制振ユニット１４が仮想的に組み込まれた。上段枠体４４では上段枠体４４から内向きに延びる４つのコイルばね４５と、同様に上段枠体４４から内向きに延びる４つのダンパ４６とが定義された。コイルばね４５およびダンパ４６の連結点に制振ユニット１４の重り４７（ｍａｓｓ）が定義された。制振ユニット１４ではｚ軸方向に重り４７の移動は拘束された。すなわち、ｘｙ平面に平行な移動のみが許容された。   As apparent from FIG. 6, the above-described vibration damping unit 14 is virtually incorporated in the upper frame body 44. In the upper frame body 44, four coil springs 45 extending inward from the upper frame body 44 and four dampers 46 extending inward from the upper frame body 44 are defined. A weight 47 (mass) of the damping unit 14 is defined at a connection point between the coil spring 45 and the damper 46. In the vibration control unit 14, the movement of the weight 47 is restricted in the z-axis direction. That is, only movement parallel to the xy plane was allowed.

検証にあたって第１〜第９具体例が設定された。図７に示されるように、第１〜第９具体例では、重り４７の重量［ｋｇ］、コイルばね４５のばね定数［Ｎ／ｍｍ］およびダンパ４６のダンパ定数［Ｎ・ｍｍ／ｓ］が設定された。こうしたパラメータは三段階に設定された。同時に、比較例が設定された。比較例では制振ユニット１４の組み込みは省略された。ラック４２には１［Ｇ］（９８００ｍｍ／ｓ２）の加速度でｘ軸方向に横揺れが加えられた。横揺れの減衰率は１％に設定された。上段枠体４４の一角に設定される測定点４８で応答加速度が計測された。 In the verification, first to ninth specific examples were set. As shown in FIG. 7, in the first to ninth specific examples, the weight [kg] of the weight 47, the spring constant [N / mm] of the coil spring 45, and the damper constant [N · mm / s] of the damper 46 are as follows. Was set. These parameters were set in three stages. At the same time, a comparative example was set. In the comparative example, the incorporation of the vibration control unit 14 was omitted. The rack 42 was subjected to a roll in the x-axis direction at an acceleration of 1 [G] (9800 mm / s 2 ). The roll decay rate was set to 1%. Response acceleration was measured at a measurement point 48 set at one corner of the upper frame 44.

その結果、図８に示されるように、比較例では、ラック４２の共振周波数［Ｈｚ］で応答加速度［Ｇ］の最大値すなわちピークが現れた。その一方で、例えば第７具体例では、図９に示されるように、ラック４２の共振周波数［Ｈｚ］と、制振ユニット１４の共振周波数［Ｈｚ］とで応答加速度［Ｇ］の極大値すなわちピークが現れた。第１〜第６具体例、第８および第９具体例でも第７具体例と同様に２つのピークが現れた。   As a result, as shown in FIG. 8, in the comparative example, the maximum value, that is, the peak of the response acceleration [G] appeared at the resonance frequency [Hz] of the rack 42. On the other hand, in the seventh specific example, for example, as shown in FIG. 9, the maximum value of the response acceleration [G] between the resonance frequency [Hz] of the rack 42 and the resonance frequency [Hz] of the vibration suppression unit 14, A peak appeared. In the first to sixth specific examples, the eighth and ninth specific examples, two peaks appeared as in the seventh specific example.

図１０に示されるように、比較例の測定点４８ではピークで５８．８［Ｇ］の応答加速度が計測された。その一方で、第１〜第９具体例の測定点４８ではラック４２の共振周波数すなわち第１ピークで２７．６〜３８．８［Ｇ］の応答加速度が計測された。同様に、制振ユニット１４の共振周波数すなわち第２ピークで２７．１〜３８．８［Ｇ］の応答加速度が計測された。第１〜第９具体例では応答加速度は比較例の応答加速度に比べて大幅に弱められることが確認された。制振ユニット１４の働きで横揺れに基づくラック４２の振動は大幅に抑制されることが確認された。   As shown in FIG. 10, the response acceleration of 58.8 [G] was measured at the peak at the measurement point 48 of the comparative example. On the other hand, at the measurement point 48 of the first to ninth specific examples, the response acceleration of 27.6 to 38.8 [G] was measured at the resonance frequency of the rack 42, that is, the first peak. Similarly, the response acceleration of 27.1-38.8 [G] was measured at the resonance frequency of the vibration suppression unit 14, that is, the second peak. In the first to ninth specific examples, it was confirmed that the response acceleration was significantly weakened compared to the response acceleration of the comparative example. It has been confirmed that the vibration of the rack 42 due to roll is greatly suppressed by the action of the vibration control unit 14.

しかも、図７を併せて参照すると、重り４７の重量が大きく設定されればされるほど、ラック４２の振動は抑制されることが確認された。同様に、コイルばね４５のばね定数が小さく設定されればされるほど、ラック４２の振動は抑制されることが確認された。その一方で、ダンパ定数の大きさはラック４２の振動の抑制にほとんど影響しないことが確認された。したがって、重り４７の重量およびコイルばね４５のばね定数が振動の減衰に大きく影響することが確認された。   Moreover, referring also to FIG. 7, it was confirmed that the greater the weight of the weight 47 is set, the more the vibration of the rack 42 is suppressed. Similarly, it was confirmed that the smaller the spring constant of the coil spring 45 is set, the more the vibration of the rack 42 is suppressed. On the other hand, it was confirmed that the magnitude of the damper constant hardly affects the vibration suppression of the rack 42. Therefore, it was confirmed that the weight of the weight 47 and the spring constant of the coil spring 45 greatly affect the damping of vibration.

続いて、本発明者らは制振ユニット１４の位置ごとに効果を検証した。前述と同様にソフトウェア解析が実施された。図１１に示されるように、解析モデル４１ａのラック４２では、前述の上段および下段枠体４４の間に第１および第２中段枠体４４ａ、４４ｂが配置される。第１および第２中段枠体４４ａ、４４ｂは、上段および下段枠体４４の距離を三等分する位置にそれぞれ配置されればよい。第１中段枠体４４ａは上段枠体４４に隣接して配置される。第２中段枠体４４ｂは下段枠体４４に隣接して配置される。   Subsequently, the inventors verified the effect for each position of the damping unit 14. Software analysis was performed as before. As shown in FIG. 11, in the rack 42 of the analysis model 41a, the first and second middle frame bodies 44a and 44b are disposed between the upper and lower frame bodies 44 described above. The first and second middle frame bodies 44a and 44b may be arranged at positions that divide the distance between the upper and lower frame bodies into three equal parts, respectively. The first middle frame 44 a is disposed adjacent to the upper frame 44. The second middle frame body 44 b is disposed adjacent to the lower frame body 44.

ラック４２のヤング率やポアソン比、重量は前述と同様の条件に設定された。重り４７の重量は前述と同様の条件に設定された。ただし、制振ユニット１４では、コイルばね４５のばね定数は４９３［Ｎ／ｍｍ］に設置された。ダンパ４６のダンパ定数は３００［Ｎ・ｍｍ／ｓ］に設定された。支柱４３の下端の移動は拘束された。制振ユニット１４ではｘｙ平面に平行な移動のみが許容された。   The Young's modulus, Poisson's ratio, and weight of the rack 42 were set to the same conditions as described above. The weight of the weight 47 was set to the same conditions as described above. However, in the damping unit 14, the spring constant of the coil spring 45 was set to 493 [N / mm]. The damper constant of the damper 46 was set to 300 [N · mm / s]. The movement of the lower end of the column 43 was restrained. In the damping unit 14, only movement parallel to the xy plane was allowed.

検証にあたって具体例Ａ〜Ｃが設定された。具体例Ａでは、制振ユニット１４は上段枠体４４内に仮想的に組み込まれた。具体例Ｂでは、制振ユニット１４は第１中段枠体４４ａ内に仮想的に組み込まれた。具体例Ｃでは、制振ユニット１４は第２中段枠体４４ｂ内に仮想的に組み込まれた。前述と同様に、比較例が設定された。比較例では制振ユニット１４の組み込みは省略された。   Specific examples A to C were set for the verification. In the specific example A, the vibration control unit 14 is virtually incorporated in the upper frame body 44. In the specific example B, the vibration control unit 14 is virtually incorporated in the first middle frame 44a. In the specific example C, the vibration control unit 14 is virtually incorporated in the second middle frame 44b. As before, a comparative example was set. In the comparative example, the incorporation of the vibration control unit 14 was omitted.

具体例Ａ〜Ｃおよび比較例のラック４２には１［Ｇ］（９８００ｍｍ／ｓ２）の加速度でｘ軸方向に横揺れが加えられた。横揺れの減衰率は１％に設定された。このとき、上段枠体４４の一角に設定される測定点４８で応答加速度が計測された。具体例Ａ〜Ｃおよび比較例では応答加速度の最大値すなわちピークが計測された。 In the racks 42 of the specific examples A to C and the comparative example, rolls were applied in the x-axis direction at an acceleration of 1 [G] (9800 mm / s 2 ). The roll decay rate was set to 1%. At this time, the response acceleration was measured at a measurement point 48 set at one corner of the upper frame 44. In the specific examples A to C and the comparative example, the maximum value of the response acceleration, that is, the peak was measured.

その結果、図１２に示されるように、比較例の測定点４８では６４．０［Ｇ］の最大応答加速度が計測された。その一方で、具体例Ａの測定点４８では３３．０［Ｇ］の最大応答加速度が計測された。具体例Ｂの測定点４８では３３．６［Ｇ］の最大応答加速度が計測された。具体例Ｃの測定点４８では３６．７［Ｇ］の最大応答加速度が計測された。比較例に対する比率から明らかなように、制振ユニット１４の働きで横揺れに基づくラック４２の振動は大幅に抑制されることが確認された。   As a result, as shown in FIG. 12, the maximum response acceleration of 64.0 [G] was measured at the measurement point 48 of the comparative example. On the other hand, the maximum response acceleration of 33.0 [G] was measured at the measurement point 48 of the specific example A. In the measurement point 48 of the specific example B, the maximum response acceleration of 33.6 [G] was measured. The maximum response acceleration of 36.7 [G] was measured at the measurement point 48 in Example C. As is clear from the ratio with respect to the comparative example, it was confirmed that the vibration of the rack 42 due to the roll was significantly suppressed by the action of the vibration control unit 14.

その一方で、具体例Ａに対する比率から明らかなように、具体例Ｃから具体例Ａに向かうにつれて最大応答加速度は弱められることが確認された。すなわち、制振ユニット１４がラック４２の上段に配置されるにつれて最大応答加速度は弱められることが確認された。制振ユニット１４はラック４２の最上段に配置されることが望ましいことが確認された。   On the other hand, as is clear from the ratio to the specific example A, it was confirmed that the maximum response acceleration was weakened from the specific example C to the specific example A. That is, it was confirmed that the maximum response acceleration is weakened as the vibration control unit 14 is arranged on the upper stage of the rack 42. It was confirmed that the damping unit 14 is preferably arranged at the uppermost stage of the rack 42.

以上のような制振ユニット１４は、ディスクアレイ装置１１のみならず、例えば複数台のサーバコンピュータ装置１３や磁気テープカートリッジ、その他の電子機器や記録媒体駆動装置を収容するラックにも用いられることができる。   The vibration damping unit 14 as described above can be used not only in the disk array device 11 but also in a rack that houses a plurality of server computer devices 13, magnetic tape cartridges, other electronic devices, and recording medium driving devices, for example. it can.

ラックの構造を概略的に示す斜視図である。It is a perspective view which shows the structure of a rack roughly. 本発明の一実施形態に係る制振ユニットの構造を概略的に示す斜視図である。It is a perspective view showing roughly the structure of the vibration control unit concerning one embodiment of the present invention. 本発明の一実施形態に係る制振ユニットの構造を概略的に示す分解斜視図である。It is a disassembled perspective view which shows roughly the structure of the damping unit which concerns on one Embodiment of this invention. 制振ユニットのモデルを概念的に示す図である。It is a figure which shows notionally the model of a damping unit. 制振ユニットのモデルを概念的に示す図である。It is a figure which shows notionally the model of a damping unit. ラックの解析モデルを概略的に示す概念図である。It is a conceptual diagram which shows schematically the analysis model of a rack. 重り、コイルばねおよびダンパといったパラメータの数値を示す表である。It is a table | surface which shows the numerical value of parameters, such as a weight, a coil spring, and a damper. 比較例で周波数および加速度の関係を示すグラフである。It is a graph which shows the relationship between a frequency and acceleration in a comparative example. 具体例で周波数および加速度の関係を示すグラフである。It is a graph which shows the relationship between a frequency and acceleration in a specific example. 比較例および具体例の応答加速度の数値を示す表である。It is a table | surface which shows the numerical value of the response acceleration of a comparative example and a specific example. ラックの解析モデルを概略的に示す概念図である。It is a conceptual diagram which shows schematically the analysis model of a rack. 比較例および具体例の応答加速度の数値を示す表である。It is a table | surface which shows the numerical value of the response acceleration of a comparative example and a specific example.

符号の説明Explanation of symbols

１２ ラック、１４ 制振ユニット、２１ 支持体、２５ 重りとしてのトレイ、２６ 重りとしての重量体、２７ 弾性伸縮部材、３１ 弾性伸縮部材。   12 racks, 14 vibration control units, 21 supports, 25 trays as weights, 26 weights as weights, 27 elastic elastic members, 31 elastic elastic members.

Claims (2)

ラックに着脱自在に搭載されるラックマウント型の支持体と、１仮想平面に沿って移動可能に支持体に支持される重りと、支持体および重りに連結される弾性伸縮部材とを備えることを特徴とする制振ユニット。   A rack mount type support body detachably mounted on the rack, a weight supported by the support body so as to be movable along one virtual plane, and an elastic elastic member connected to the support body and the weight. A characteristic damping unit. 請求項１に記載の制振ユニットにおいて、前記重りは、前記仮想平面に沿って移動可能に前記支持体に連結されるトレイと、着脱自在にトレイに装着される１以上の重量体とを備えることを特徴とする制振ユニット。   2. The vibration control unit according to claim 1, wherein the weight includes a tray coupled to the support body so as to be movable along the virtual plane, and one or more weight bodies detachably attached to the tray. A vibration control unit characterized by that.
JP2005342080A 2005-11-28 2005-11-28 Vibration control unit Active JP4327790B2 (en)

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