GB/T 11349.1-2018Mechanical vibration and shock -- Experimental determination of mechanical mobility -- Part 1: Basic terms and definitions, and transducer specifications (English PDF)

Foreword

GB/T 11349 "Mechanical vibration and shock - Experimental determination of

mechanical mobility" consists of the following three parts:

- Part 1: Basic terms and definitions, and transducer specifications;

- Part 2: Measurements using single-point translation excitation with an attached

vibration exciter;

- Part 3: Measurement using impact excitation.

This Part is Part 1 of GB/T 11349.

This Part was drafted in accordance with the rules given in GB/T 1.1-2009.

This Part replaces GB/T 11349.1-2006 "Vibration and shock - Experimental

determination of mechanical mobility - Part 1: Basic definitions and transducers".

Compared with GB/T 11349.1-2006, the main technical differences besides editorial

modifications are as follows:

- MODIFY the standard name;

- MERGE "Symbols and units" and "Terms and definitions" INTO Clause 3 "Terms,

definitions, and symbols"; DELETE the term "other frequency-response function

related to mobility"; RETAIN Table 1 (see Clause 3 of this Part, Clauses 3 and 4

of the 2009 edition);

- INCLUDE part of the content in the introduction of GB/T 11349.1-2006 as the

main text in the "Fundamentals and general relationships" clause (see Clause 4 of

this Part, the introduction of the 2009 edition);

- ADJUST the dimensions, mass, polarity, frequency response, and transverse

sensitivity of the accelerometer in the supplementary calibration item TO the basic

calibration item; ADD the threshold in reference to the bandwidth of the transducer

TO the supplementary calibration item; ADJUST the order of clauses and

subclauses accordingly. (see 6.3 of this Part, 6.2 of the 2009 edition).

- CHANGE the recommended time interval for repeating basic calibrations and tests

from 1 year to 2 years (see 7.1 of this Part, 7.1 of the 2009 edition).

This Part is identical to ISO 7626-1:2011 "Mechanical vibration and shock -

Experimental determination of mechanical mobility - Part 1: Basic terms and

definitions, and transducer specifications" (2nd edition, English version), using the

translation method.

Mechanical vibration and shock - Experimental

determination of mechanical mobility - Part 1: Basic terms

and definitions, and transducer specifications

1 Scope

This Part of GB/T 11349 defines basic terms and specifies the calibration tests,

environmental tests and physical measurements necessary to determine the suitability

of impedance heads, force transducers and motion response transducers for use in

measuring mechanical mobility. Primarily, this Part provides guidelines for the

selection, calibration and evaluation of the transducers and instruments for their

suitability in making mobility measurements. Procedures for carrying out mobility

measurements in various circumstances are dealt with in subsequent parts of GB/T

11349.

This Part is limited to information which is basic to various types of driving-point and

transfer mobility, accelerance and dynamic compliance measurements. Measurements

of the blocked impedance are not dealt with.

2 Normative references

The following referenced documents are indispensable for the application of this

document. For dated references, only the edition cited applies. For undated references,

the latest edition of the referenced document (including any amendments) applies.

GB/T 2298-2010 Mechanical vibration, shock and condition monitoring -

Vocabulary (ISO 2041:2009, IDT)

ISO 5347 (all parts) Methods for the calibration of vibration and shock pick-ups

ISO 16063 (all parts) Methods for the calibration of vibration and shock transducers

IEC 60263 Scales and sizes for plotting frequency characteristics and polar diagrams

3 Terms, definitions, and symbols