ISO 7626-2:2015 PDF

Mechanical vibration and shock — Experimental determination of mechanical mobility — Part 2: Measurements using single-point translation excitation with an attached vibration exciter

Open preview (PDF)

Title (English):

ISO 7626-2:2015

Mechanical vibration and shock — Experimental determination of mechanical mobility — Part 2: Measurements using single-point translation excitation with an attached vibration exciter

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 26
Publication date:: April 13, 2015
Edition:: ISO IS 7626 edition 2 version 1
ICS:: 17.160

Delivery type:

Full version25 €Read online 24h10 €Read online 72h15 €

Document language:

enru

Delivery time:Immediate download

Price:25 €

Description (English):

ISO 7626-2:2015 specifies procedures for measuring linear mechanical mobility and other frequency-response functions of structures, such as buildings, machines and vehicles, using a single-point translational vibration exciter attached to the structure under test for the duration of the measurement. It is applicable to measurements of mobility, accelerance, or dynamic compliance, either as a driving-point measurement or as a transfer measurement. It also applies to the determination of the arithmetic reciprocals of those ratios, such as free effective mass. Although excitation is applied at a single point, there is no limit on the number of points at which simultaneous measurements of the motion response may be made. Multiple-response measurements are required, for example, for modal analyses.

Technical details

Technical committee: ISO/TC 108 - Mechanical vibration, shock and condition monitoring
SKU: ISO 7626-2:2015

Abstract

Overview

ISO 7626-2:2015 - part of the ISO 7626 series on mechanical vibration and shock - defines standardized procedures for experimental determination of mechanical mobility using a single-point translational vibration exciter attached to the test structure. The standard covers measurement of related frequency‑response functions (mobility, accelerance, dynamic compliance) as driving‑point or transfer measurements. Although excitation is applied at one location, simultaneous motion measurements at multiple points are supported, making the method suitable for modal analysis and multi-point dynamic characterization.

Key topics and technical requirements

Measurement configuration: overall test-system layout, support of the structure (grounded vs ungrounded), and exciter attachment.
Excitation methods: permitted waveforms (discretely dwelled sinusoidal, slowly swept sine, stationary random, and others) and control of excitation levels and duration.
Vibration exciters: selection, attachment, and requirements to minimize spurious forces and moments (including transducer mass and rotational inertia effects).
Transducer and force measurement: placement and attachment of accelerometers/velocity sensors and force transducers; procedures for mass loading and cancellation.
Signal acquisition and processing: determination of frequency‑response functions, filtering, frequency resolution and avoidance of saturation for both sinusoidal and random excitation.
Calibration and validation: operational calibration of sensors and amplifiers, tests for valid data (normative annex), and criteria for reliable measurements.
Modal parameter identification: guidance (informative annex) on extracting modal properties (natural frequencies, damping ratios, mode shapes) from multiple-response mobility data.
Supporting annexes: normative tests for validity and requirements for excitation frequency increments/durations.

Applications and users

ISO 7626-2:2015 is intended for engineers and laboratories involved in:

Vibration testing and structural dynamics of buildings, machines, vehicles and other assemblies.
Modal analysis, model validation and updating of finite-element models using measured mobility or accelerance data.
Predicting dynamic interaction between interconnected components and assessing vibration transmission.
Material dynamic property estimation and troubleshooting vibration problems in design and manufacturing.

Typical users: vibration test engineers, NVH (noise‑vibration‑harshness) specialists, structural dynamics researchers, test-house personnel and consultants.

Related standards

ISO 7626-1 - Basic terms, definitions and transducer specifications (refer to for definitions and limitations).
ISO 7626-5 - Measurements using impact excitation (alternative excitation method).
ISO/TC 108 - Technical committee on mechanical vibration, shock and condition monitoring.

Keywords: ISO 7626-2:2015, mechanical mobility, vibration testing, single-point translation excitation, vibration exciter, frequency-response functions, accelerance, dynamic compliance, modal analysis.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Measurement configuration: overall test-system layout, support of the structure (grounded vs ungrounded), and exciter attachment.
Excitation methods: permitted waveforms (discretely dwelled sinusoidal, slowly swept sine, stationary random, and others) and control of excitation levels and duration.
Vibration exciters: selection, attachment, and requirements to minimize spurious forces and moments (including transducer mass and rotational inertia effects).
Transducer and force measurement: placement and attachment of accelerometers/velocity sensors and force transducers; procedures for mass loading and cancellation.
Signal acquisition and processing: determination of frequency‑response functions, filtering, frequency resolution and avoidance of saturation for both sinusoidal and random excitation.
Calibration and validation: operational calibration of sensors and amplifiers, tests for valid data (normative annex), and criteria for reliable measurements.
Modal parameter identification: guidance (informative annex) on extracting modal properties (natural frequencies, damping ratios, mode shapes) from multiple-response mobility data.
Supporting annexes: normative tests for validity and requirements for excitation frequency increments/durations.

Applications and users

ISO 7626-2:2015 is intended for engineers and laboratories involved in:

Vibration testing and structural dynamics of buildings, machines, vehicles and other assemblies.
Modal analysis, model validation and updating of finite-element models using measured mobility or accelerance data.
Predicting dynamic interaction between interconnected components and assessing vibration transmission.
Material dynamic property estimation and troubleshooting vibration problems in design and manufacturing.

Typical users: vibration test engineers, NVH (noise‑vibration‑harshness) specialists, structural dynamics researchers, test-house personnel and consultants.

Related standards

ISO 7626-1 - Basic terms, definitions and transducer specifications (refer to for definitions and limitations).
ISO 7626-5 - Measurements using impact excitation (alternative excitation method).
ISO/TC 108 - Technical committee on mechanical vibration, shock and condition monitoring.

ISO 7626-2:2015 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Applications and users

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Applications and users

Related standards

Related standards

Vibration and shock — Experimental determination of mechanical mobility — Part 2: Measurements using single-p…

Vibration and shock — Experimental determination of mechanical mobility — Part 1: Basic definitions and trans…

Vibration and shock — Experimental determination of mechanical mobility — Part 5: Measurements using impact e…