1、CEN EN*E!052-1 EUROPEAN STANDARD NORMEEUROPENNE EUROPISCHE NORM 92 3404589 0035482 O99 EN 29052-1 June 1992 UDC 699.844-405.8:534.833:62O, 1:533.6.O11.2 Descriptors: Acoustics, acoustics insulation, residential buildings, slabs, insulation materials: acoustics, determination, dynamic stiffness, vibr
2、ation tests English version Acoustics - Determination of dynamic stiffness - Part 1: Materials used under floating floors in dwellings Acoustique - Dtermination de la raideur dynamique - Steifigkeit - Partie 1: Matriaux utiliss sous les dalles flottantes dans les btiments d?habitation Akustik - Best
3、immung der dynamischen Teil 1 : Materialien, die unter schwimmenden Estrichen in Wohngebuden verwendet werden This European Standard was approved by CEN on 1992-06-24. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European St
4、andard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, Frenc
5、h, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, Fr
6、ance, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels
7、O 1992 Copyright reserved to CEN members Ref. No. EN 29052-1 : 1992 E CEN EN*29052-1 92 3404589 0035483 T25 Page 2 EN 29052-1 : 1992 Foreword Following the positive result of the Unique Acceptance Procedure, CEN adopted the International Standard IS0 9052-1 : 1989 Acoustics - Determination of dynami
8、c stiffness - Part 1 : Materiais used under floating floors in dwellings. This European Standard has been drawn up in order to comply with the request of the Standing Committee for construction following Council Directive 89/ 1 06EEC on construction products and the provisional mandate Protection ag
9、ainst noise (BC/CEN/08/1991) related to it and issued by EEC and ERA. National standards identical to this European Standard shall be published at the latest by 1992-12-31 and conflicting national standards shall be withdrawn at the latest by 1992-12-31. In accordance with the Common CENKENELEC Rule
10、s the following countries are bound to implement this European Standard : Austria, Belgium, Denmark, Finland, France, Greece, Germany, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN EN*29052-L 92 3404589 0035Y84 961 m Page 3 EN
11、29052-1 : 1992 Acoustics - Determination of dynamic stiffness - Part 1: Materials used under floating floors in dwellings 1 Scope This part of IS0 9052 specifies the test method for determining the dynamic stiffness of resilient materials used under floating floors. Dynamic stiffness is one of the p
12、arameters that deter- mine the sound insulation of such floors in dwellings. of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 7626-2 : -2), Vibration and shock - Experimental deter- mination of mechanical mobility - Part 2: M
13、easurements using single-point translation excitation with an attached vibra- tion exciter. This part of IS0 9052 applies to the determination of dynamic stiffness per unit area of resilient materials with smooth sur- faces (see clause 6) used in a continuous layer under floating floors in dwellings
14、. It does not apply to loadings lower than 0,4 kPal), for example materials in wall linings, or greater than 4 kPal), for example materials under machinew foundations (see note 2). This part of IS0 9052 is mainly intended to be used for compar- ing production samples of similar materials of known sp
15、ecified quality. For restrictions concerning the airflow resistivity of the resilient material to be tested, see 8.2. NOTES 1 The dependence of dynamic stiffness on prestatic load is of minor importance in the case of materials usually applied in wall linings, for example polystyrene or mineral fibr
16、e. The differences between dynamic stiffness values measured with a static load of 2 kPa in ac- cordance with this part of IS0 9052 and those measured with a very low preload are of the order of 10 % to 20 %. 2 A further part of IS0 9052 will deal with the determination of dynamic stiffness of mater
17、ials used in technical floating floors (high static load). 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 9052. At the time of publication, the editions indicated were valid. All standards are subject
18、 to revision, and parties to agreements based on this part of IS0 9052 are encouraged to investigate the possibility of applying the most recent editions IS0 9053 : -21, Acoustics - Materials for acoustical appli- cations - Determination of aidlow resistance. 3 Definitions 3.1 dynamic stiffness: The
19、 ratio of dynamic force to dynamic displacement. For the purposes of this part of IS0 9052, dynamic stiffness per unit area, s, is used and is given by the following equation : . . . (1) FIS s = - Ad where S is the area of the test specimen; F is the dynamic force acting perpendicularly on the test
20、specimen ; Ad is the resulting dynamic change in thickness of the resilient material. In this part of IS0 9052, the following quantities are used: - dynamic stiffness per unit area of the materials struc- ture, si; - dynamic stiffness per unit area of enclosed gas (e.g. air), si; - apparent dynamic
21、stiffness per unit area of the test specimen, s; - the dynamic stiffness per unit area of the installed resilient material, s. 1) 1 Pa = 1 N/m* 21 To be published. CEN EN*29052-1 92 3404589 0035485 8T8 Page 4 EN 29052-1 : 1992 3.2 system. natural frequency, fo: Frequency of free oscillation of a The
22、 natural frequency of a resiliently supported floor is given by the following equation : For the test set-up shown in figure 1, the inertia of the base shall be such that in vibration its velocity is negligible compared with that of the load plate. For the test arrangements shown in figures 2 and 3,
23、 the mass of the baseplate shall be at least 100 kg. f0=2R1/$ 1 where . . . (2) 6 Test specimen s is the dynamic stiffness per unit area of the installed resilient material; m is the mass per unit area of the supported floor. 3.3 occurs in the test arrangement. resonant frequency, f,: Frequency at w
24、hich resonance The resonant frequency is given by the following equation (3) where s; is the apparent dynamic stiffness per unit area of the test specimen; m, is the total mass per unit area used during the test. 4 Principle Determination of the apparent dynamic stiffness per unit area of the test s
25、pecimen, by a resonance method in which the resonant frequency, f, of the fundamental vertical vibration of a spring-and-mass system is measured, the spring being the test specimen of the resilient material under test and the mass being a load plate. 5 Test arrangement The specimen shall be placed b
26、etween two horizontal surfaces, .e. the base (or baseplate) and the load plate. The load plate shall be square, with dimensions (200 f 3) mm x (200 f 3) mm, and made of steel. The base (or baseplate) and the load plate shall have profile irregularities of less than 0,5 mm and be sufficiently rigid t
27、o avoid bending waves in the frequency range of interest. The excitation is applied by one of the methods shown in figures 1. 2 or 3. The total load on the test specimen including all measuring and/or excitation equipment shall be 8 kg f 0,5 kg. Excitation and measuring devices shall be applied in s
28、uch a way that only vertical oscillations Le. without rotational com- ponents) occur. At least three square specimens of dimensions 200 mm x 200 mm shall be taken. The surfaces of the test specimens shall be considered to be smooth if the surface irregularities are less than 3 mm. The test specimen
29、shall be covered with a waterproof plastic foil, approximately 0,02 mm thick, on which a thin paste of plaster of Paris and water is applied to a depth of at least 5 mm so that any unevenness is covered. Before the plaster begins to set, the load plate shall be bedded onto it as shown in figures la)
30、, 2a) and 3a). In the case of closed cell materials, the joint between the specimen and the base (or baseplate) shall be sealed around the perimeter with a fillet of petroleum jelly. See figures Ib), 2b) and 3b). 7 Procedure 7.1 General The resonant frequency, A, of the fundamental vertical vibra- t
31、ion of the test specimen and the load plate can be determined by using either sinusoidal, white noise or pulse signals. All these methods are equivalent. In case of dispute, the method using sinusoidal signals (7.2) shall be the reference method. 7.2 Sinusoidal signals Obtain the resonant frequency
32、by varying the frequency of excitation, while keeping the excitation force constant. If the resonant frequency depends on the amplitude of the excitation force, this dependence shall be determined down to as low a value as possible and the resonant frequency shall be found by extrapolation to zero f
33、orce amplitude. Depending on the expected stiffness value, the measurement interval used as the basis for extrapolation shall be as follows: 0.2 N 50 MN/m3 0,l N 100 kPa.s/m2 s = s . . . (5) t b) For intermediate airflow resistivity, where 100 kPa.s/m2 r 10 kPa.s/mZ s = s; 3- s; . . . (6) The dynami
34、c stiffness per unit area of the enclosed gas, si, is calculated in accordance with equation (7) which is based on the assumption that sound propagation in resilient material is isothermal : where po is the atmospheric pressure; (7) d) the date of the test, environmental conditions (for ex- ample te
35、mperature, relative humidity) ; e) the extrapolated frequency, A, in hertz, the apparent dynamic stiffness per unit area of the test specimen, si, the dynamic stiffness per unit area of the enclosed air, sa, and, if possible, dynamic stiffness per unit area, s, of the resilient material. All values
36、for the dynamic stiffness per unit area shall be stated in meganewtons per cubic metre to the nearest meganewton per cubic metre. If, in the case of materials with airflow resistivity less than 10 kPa.s/m2, the dynamic stiffness of the enclosed gas, da, is not considered separately, the reason and the estimated error should be given (see 8.2). 1) Impact excitation will be dealt with in IS0 76265 (in preparation).
