JPH0437376B2 - - Google Patents
Info
- Publication number
- JPH0437376B2 JPH0437376B2 JP57049357A JP4935782A JPH0437376B2 JP H0437376 B2 JPH0437376 B2 JP H0437376B2 JP 57049357 A JP57049357 A JP 57049357A JP 4935782 A JP4935782 A JP 4935782A JP H0437376 B2 JPH0437376 B2 JP H0437376B2
- Authority
- JP
- Japan
- Prior art keywords
- protrusion
- drum
- tire
- road surface
- density
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000012360 testing method Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 description 6
- 239000010426 asphalt Substances 0.000 description 5
- 239000002344 surface layer Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
- G01M17/022—Tyres the tyre co-operating with rotatable rolls
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tires In General (AREA)
- Testing Of Balance (AREA)
Description
【発明の詳細な説明】
この発明は、タイヤの動的特性を試験するため
に用いられる試験装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a testing device used for testing the dynamic properties of tires.
タイヤの振動特性、騒音特性等を調べるために
従来用いられてきた室内試験法は、大別して次の
３通りの方法である。 Indoor test methods conventionally used to examine the vibration characteristics, noise characteristics, etc. of tires can be broadly classified into the following three methods.
(1) 回転するドラムに１本の突起を取り付け、こ
の突起でタイヤに衝撃を与えることによりタイ
ヤをインパクト加振し、その応答性を調べる方
法。(1) A method in which a single protrusion is attached to a rotating drum, and this protrusion applies an impact to the tire, causing impact vibration to the tire and examining its response.
(2) 同じく回転ドラムに正弦波もしくは矩形波に
よつて構成される凹凸をそなえた擬似路面を取
り付け、タイヤに一定振巾、一定周波数の振動
を与えて、その応答を解析する方法。(2) Similarly, a method in which a simulated road surface with irregularities made up of sine waves or rectangular waves is attached to a rotating drum, vibrations of a constant amplitude and constant frequency are applied to the tires, and the response is analyzed.
(3) 実際の路面からレプリカを取り、これを回転
ドラムに取り付けることにより、実際の道路と
同等の振動をタイヤに与え、その応答を解析す
る方法。(3) A method of taking a replica of the actual road surface and attaching it to a rotating drum to apply vibrations to the tires equivalent to those on the actual road and analyze the response.
しかしながら、上記(1)，(2)の方法は、タイヤの
特性試験法としては有効であるが、タイヤの受け
る振動波形自体が実路走行時のものと異なるた
め、実路での特性を充分把握できないという問題
があつた。また、上記(3)の方法では、ドラムに特
定路面の部分的なレプリカのみが取り付けられる
ことになるので、試験条件が偏り、一般的な応答
が得られないと云う問題があつた。 However, although methods (1) and (2) above are effective as tire characteristic testing methods, the vibration waveforms experienced by the tire themselves are different from those when driving on the actual road, so they do not adequately test the characteristics on the actual road. I had a problem that I couldn't figure out. In addition, in the method (3) above, only a partial replica of a specific road surface is attached to the drum, so there is a problem that the test conditions are biased and a general response cannot be obtained.
この発明は、上記事情に鑑み、できるだけ実走
行状態に近い試験条件を現出することのできるよ
うな試験装置を提供すべくなされたもので、その
特徴とするところは、タイヤが押し付けられる回
転ドラムの外周部に突出量２〜10mmのボルト、小
ねじ等の着脱自在な突起物を1000cm2につき60〜
120個の密度で、密度、突出量ともランダムに分
散させた点にある。以下、図面にあらわされた実
施例にもとづいて具体的に説明する。 In view of the above circumstances, the present invention was made to provide a test device that can provide test conditions as close to actual driving conditions as possible.The present invention is characterized by a rotating drum against which tires are pressed. Attach removable protrusions such as bolts and machine screws with a protrusion of 2 to 10 mm on the outer periphery of 60 to 60 mm per 1000 cm2.
The density is 120, and the density and protrusion amount are both randomly distributed. Hereinafter, a detailed explanation will be given based on the embodiments shown in the drawings.
第１図は、本発明にかかる試験装置の１例をあ
らわす概略図であり、回転軸１ａをそなえたドラ
ム１が支持装置２により回転自在に支持されてい
る。このドラム１には、駆動装置２の回転動力が
ベルト３を介して伝達され、所定の回転速度でド
ラム１を回転させる。ドラムの外径は1.5ｍ程度
とするのがよいが、これに限定されるものではな
い。ドラム１の外周部には、擬似路面層４が取り
付けられている。擬似路面層４は、第２図に示す
ように、ドラム１に対し着脱自在なアルミニウム
板５にすべり音防止のためのセフテイウオーク６
を貼り付け、このセフテイウオーク６の表面に形
状および／または寸法の不揃いな突起物７を多数
ランダムに植え付けてなる。突起物７は路面の凹
凸を現出する石ころ等の働きをなすもので、この
突起物としては、ボルトまたは小ねじを利用し、
これを頭部を突出させた状態で螺着しておくのが
便利である。なかでは、JISB1101に規定されて
いるM4〜M6のトラス小ねじもしくは丸小ねじを
用いるのが好ましく、その植付け密度は、400mm
×250mmの面積すなわち1000cm2の面積の中に60〜
120個程度とするのが好ましい。これら多数の突
起物７を植え付けるに際しては、その形状、寸
法、配設位置等に関し、ドラム全周にわたつてで
きるだけランダムな分布状態となるよう、コンピ
ユータ等を用いてその配設条件を設定しておくの
がよい。また、上記小ねじを突起物として利用す
る場合は、必要なワツシヤを含め、頭部の突出量
を２〜10mmとしておくのが好ましい。種類の異な
る小ねじまたはボルトを一つの擬似路面層４に植
え付ける場合は、それぞれの小ねじまたはボルト
についてドラム全周にわたりランダムに分布する
ように植付け状態を設定する。植付け密度、突出
量等の範囲を限定したのは、次の理由による。す
なわち、日本国内の道路は、高速道、一般国道、
地方道を含めアスフアルト舗装が施されているの
が一般的である。このアスフアルト舗装路の骨材
としては、小石、砂利等が使用されており、その
小石の粒度（直径）はおおよそ４〜10数mm程度の
ものが多い。一方、特に荒れたアスフアルト路の
路面荒さの観点から見ると、骨材はバインダーで
あるアスフアルトに埋め込まれ、おおよそその粒
径の半分が突出していると考えられる。よつて、
上記突出量を２〜10mmとするのが好ましいと考え
られる。この突出量は、ねじそのものの高さと、
使用するワツシヤの形状、枚数により変更可能で
あり、突出量もランダムなものとすることができ
る。また、上記と同様に、アスフアルト舗装路を
観察したところでは、60〜120個／1000cm2程度に
小石がバラツイているので、この範囲を好ましい
範囲とした。この密度が小さ過ぎると連続したラ
ンダムな加振が得られない。逆に大き過ぎると、
連続ではあるが、平滑化されてしまい、加振入力
が小さくなると考えられる。本発明では、ある程
度ランダムで、かつ加振力も欲しいため上記の範
囲とした。 FIG. 1 is a schematic diagram showing an example of a test apparatus according to the present invention, in which a drum 1 having a rotating shaft 1a is rotatably supported by a support device 2. The rotational power of a drive device 2 is transmitted to this drum 1 via a belt 3, and the drum 1 is rotated at a predetermined rotational speed. The outer diameter of the drum is preferably about 1.5 m, but is not limited to this. A pseudo road surface layer 4 is attached to the outer periphery of the drum 1. As shown in FIG. 2, the pseudo road surface layer 4 includes a safety walk 6 for preventing sliding noise on an aluminum plate 5 that is detachable from the drum 1.
A large number of protrusions 7 of irregular shapes and/or dimensions are randomly planted on the surface of the safety walk 6. The protrusions 7 function as stones or the like that make the unevenness of the road surface appear, and bolts or small screws are used as the protrusions.
It is convenient to screw this on with the head protruding. Among these, it is preferable to use M4 to M6 truss machine screws or round machine screws specified in JISB1101, and the planting density is 400 mm.
x 60 to 250mm area or 1000cm2 area
It is preferable to set the number to about 120. When planting a large number of these protrusions 7, the placement conditions are set using a computer or the like so that the shapes, dimensions, placement positions, etc. of the protrusions 7 are distributed as randomly as possible over the entire circumference of the drum. It is better to leave it there. Further, when the machine screw is used as a protrusion, it is preferable that the protrusion amount of the head including the necessary washer be set to 2 to 10 mm. When different types of machine screws or bolts are planted in one pseudo road surface layer 4, the planting state is set so that each machine screw or bolt is randomly distributed over the entire circumference of the drum. The reason for limiting the range of planting density, amount of protrusion, etc. is as follows. In other words, roads in Japan include expressways, general national highways,
It is common for roads, including local roads, to be paved with asphalt. Pebbles, gravel, etc. are used as the aggregate for this asphalt pavement, and the particle size (diameter) of the pebbles is often about 4 to 10-odd mm. On the other hand, from the perspective of the roughness of the asphalt road, which is particularly rough, it is thought that the aggregate is embedded in the asphalt binder, with approximately half of its particle size protruding. Then,
It is considered preferable that the amount of protrusion is 2 to 10 mm. This protrusion amount is the height of the screw itself,
It can be changed depending on the shape and number of washers used, and the amount of protrusion can also be made random. Further, in the same manner as above, when observing the asphalt pavement, the number of pebbles varied to about 60 to 120 pieces/1000 cm 2 , so this range was set as the preferable range. If this density is too small, continuous random vibration cannot be obtained. On the other hand, if it is too large,
Although it is continuous, it is considered to be smoothed and the vibration input becomes smaller. In the present invention, since a certain degree of randomness and excitation force are desired, the above range is set.
この試験装置を用いてタイヤの動的特性を調べ
るには、第１図に示す如く、供試タイヤ８をドラ
ム１の外周部に設けられている擬似路面層４に押
し当てた状態で、支持具９により回転自在に支持
し、駆動装置２によりドラム１を回転させる。こ
れにより、タイヤ８がドラム１と反対方向に回転
しつつ突起物７の働きによりランダムに加振され
る。 In order to examine the dynamic characteristics of a tire using this testing device, as shown in FIG. The drum 1 is rotatably supported by a tool 9 and rotated by a drive device 2. As a result, the tire 8 rotates in the opposite direction to the drum 1 and is vibrated randomly by the action of the protrusion 7.
本発明にかかる試験装置は、タイヤが押しつけ
られる回転ドラムの外周部に、ボルト、小ねじ等
の着脱自在な突起物を、その突出量が２〜10mm、
密度が1000cm2につき60〜120個となるように、突
出量、密度ともランダムに分散させて設け、この
回転ドラムでタイヤを加振するものであるから、
走行中におけるタイヤの加振状態をより忠実に再
現することができるようになつた。これにより、
ランダムな入力を受けた場合のタイヤの応答特性
の調査が可能となり、例えば走行中において路面
からのランダムな加振により発生するロードノイ
ズの解析等に用いてきわめて効果的なものとなつ
た。この突起物として、着脱自在なボルトまたは
小ねじを使用することとすれば、入手性、経済
性、取扱い易さ等の面で有利である。この場合、
ボルトまたは小ねじの種類、突出高さ、配置等を
変化させることにより、どのような路面をも再現
できるので便利である。この試験装置をタイヤ以
外のランダムな接触加振を受けるものの耐久試験
等に用いることができることは明らかである。 The test device according to the present invention has a removable protrusion such as a bolt or machine screw on the outer periphery of the rotating drum against which the tire is pressed.
Since the protrusion amount and density are randomly distributed so that the density is 60 to 120 pieces per 1000 cm 2 , and the tire is excited by this rotating drum,
It is now possible to more faithfully reproduce the vibration state of the tire while driving. This results in
It has become possible to investigate the response characteristics of tires when receiving random inputs, and it has become extremely effective for use in, for example, analyzing road noise generated by random vibrations from the road surface while driving. If a removable bolt or small screw is used as the protrusion, it is advantageous in terms of availability, economy, ease of handling, etc. in this case,
It is convenient because any road surface can be reproduced by changing the type, protrusion height, arrangement, etc. of the bolts or machine screws. It is clear that this testing device can be used for durability tests of other objects than tires that are subjected to random contact vibrations.
第３図から第７図までは、横軸に周波数（Hz）
をとり、縦軸に振動レベルをとつた振動特性（上
下振動）図であり、第３図と第４図はそれぞれ六
甲トンネル（兵庫県）および西宮市内における実
際の路面の振動特性をあらわす。一方、第５図は
従来の擬似ランダム路面（レプリカ）の、また、
第６図は従来のサイン波ドラム（144ピツチ／周）
の振動特性をあらわす。第３図および第４図に示
されている実際の路面の振動特性と、第５図およ
び第６図に示されている従来の擬似路面の振動特
性との間にはかなりの差があることがわかる。第
７図は本発明にかかる試験装置のドラム（M4，
M5丸小ねじ）の振動特性をあらわすもので、従
来のものに較べて実際の路面の振動特性に近いも
のとなつている。本実施例における小ねじの突出
量は3.6〜4.7mmであり、植付け密度は約80個／
1000cm2であつた。なお、供試タイヤはいずれもサ
イズ185／70SR14，パターンSP4☆、空気圧1.8
Kg／cm2であり、走行速度は第３図の場合が50Km／
Ｈ、第４図が45Km／Ｈ、第５図が40Km／Ｈ、第６
図が60Km／Ｈから10Km／Ｈへの惰行（Peak
Hold）、第７図が40Km／Ｈであつた。
From Figures 3 to 7, the horizontal axis shows frequency (Hz).
It is a diagram of vibration characteristics (vertical vibration) with vibration level taken on the vertical axis, and Figures 3 and 4 show the vibration characteristics of actual road surfaces in Rokko Tunnel (Hyogo Prefecture) and Nishinomiya City, respectively. On the other hand, Fig. 5 shows the conventional pseudo-random road surface (replica) and
Figure 6 shows a conventional sine wave drum (144 pitches/round)
represents the vibration characteristics of There is a considerable difference between the vibration characteristics of the actual road surface shown in FIGS. 3 and 4 and the vibration characteristics of the conventional simulated road surface shown in FIGS. 5 and 6. I understand. Figure 7 shows the drum (M4,
This represents the vibration characteristics of an M5 round machine screw, which is closer to the vibration characteristics of an actual road surface than conventional ones. In this example, the protrusion amount of the machine screws is 3.6 to 4.7 mm, and the planting density is approximately 80 pieces/
It was 1000cm2 . All test tires are size 185/70SR14, pattern SP4☆, and air pressure 1.8.
Kg/ cm2 , and the running speed is 50Km/cm in the case of Figure 3.
H, Figure 4 is 45Km/H, Figure 5 is 40Km/H, Figure 6 is
The figure shows coasting from 60Km/H to 10Km/H (Peak
Hold), Figure 7 was 40Km/H.
第１図は本発明にかかる試験装置の１例をあら
わす概略図、第２図はその要部の拡大図、第３図
から第７図までは振動特性をあらわすグラフであ
る。
１…ドラム、２…駆動装置、３…ベルト、４…
擬似路面層、５…アルミニウム板、６…セフテイ
ウオーク、７…突起物、８…タイヤ。
FIG. 1 is a schematic diagram showing an example of a test device according to the present invention, FIG. 2 is an enlarged view of its main parts, and FIGS. 3 to 7 are graphs showing vibration characteristics. 1...Drum, 2...Drive device, 3...Belt, 4...
Pseudo road surface layer, 5... Aluminum plate, 6... Safety walk, 7... Protrusion, 8... Tire.
Claims (1)
に、ボルト、小ねじ等の着脱自在な突起物を、そ
の突出量が２〜10mm、密度が1000cm2につき60〜
120個となるように、突出量、密度ともランダム
に分散させて設けたことを特徴とするタイヤの動
的特性試験装置。1 Install removable protrusions such as bolts and machine screws on the outer periphery of the rotating drum against which the tire is pressed, with a protrusion of 2 to 10 mm and a density of 60 to 1000 cm2 .
A tire dynamic characteristic testing device characterized by having 120 tires randomly distributed in protrusion amount and density.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57049357A JPS58166240A (en) | 1982-03-27 | 1982-03-27 | Tester for dynamic characteristic of tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57049357A JPS58166240A (en) | 1982-03-27 | 1982-03-27 | Tester for dynamic characteristic of tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58166240A JPS58166240A (en) | 1983-10-01 |
| JPH0437376B2 true JPH0437376B2 (en) | 1992-06-19 |
Family
ID=12828762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57049357A Granted JPS58166240A (en) | 1982-03-27 | 1982-03-27 | Tester for dynamic characteristic of tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58166240A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06103244B2 (en) * | 1989-06-19 | 1994-12-14 | 本田技研工業株式会社 | Drum device |
| JP4343791B2 (en) * | 2004-07-26 | 2009-10-14 | 株式会社ブリヂストン | Vulcanized rubber wear test method |
| JP4915139B2 (en) * | 2006-05-16 | 2012-04-11 | 横浜ゴム株式会社 | Tire noise test method |
| JP2009287946A (en) * | 2008-05-27 | 2009-12-10 | Toyota Motor Corp | Excitation device and vehicle abnormal noise inspection method using the same |
| JP5525422B2 (en) * | 2010-11-24 | 2014-06-18 | 住友ゴム工業株式会社 | Tire vibration characteristic test apparatus and test method using the same |
| US8347703B2 (en) * | 2011-02-11 | 2013-01-08 | Bridgestone Americas Tire Operations, Llc | Tire chip and tear test apparatus and method |
| KR101641069B1 (en) * | 2011-12-29 | 2016-07-29 | 미쉐린 러쉐르슈 에 떼크니크 에스.에이. | Tire operating surface for tire testing road wheel |
| EP2713153A3 (en) | 2012-09-30 | 2016-08-17 | Michelin Recherche et Technique S.A. | Method of applying particulate material along a tire footprint during tire testing on a tire testing surface |
-
1982
- 1982-03-27 JP JP57049357A patent/JPS58166240A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58166240A (en) | 1983-10-01 |
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