ISO 10846-5:2008

Overview - ISO 10846-5:2008 (Acoustics and vibration)

ISO 10846-5:2008 defines the driving point method for laboratory determination of the low-frequency dynamic transfer stiffness of resilient supports used for translatory motion. The method measures vibrations and input forces with the output side blocked (the “driving point”), under a specified static preload, and is applicable to test elements with parallel flanges (or with an auxiliary fixture to create parallel flanges). Results are primarily intended for the low-frequency band where the dynamic driving-point stiffness equals the dynamic transfer stiffness.

Key topics and technical requirements

• Test principle: measure input force and input displacement (velocity or acceleration) while the output is blocked to obtain the dynamic driving-point stiffness k1,1.
• Low-frequency validity: driving-point results represent the transfer stiffness k2,1 only at low frequencies where inertial effects in the element are negligible.
• Frequency range: method covers from f = 1 Hz to an upper limiting frequency fUL (typically the upper limit is in the order of 50 Hz to 200 Hz, depending on test rig).
• Translations covered: normal and transverse translations relative to the flange plane.
• Test arrangement and equipment: static preload application, use of force transducers, accelerometers, vibration exciter, signal summation and analysers. Criteria for adequacy of the arrangement and suppression of unwanted vibrations are specified.
• Data treatment: calculation of dynamic driving-point stiffness, one‑third‑octave-band frequency-averaged values, narrow-band presentation, tests for linearity, and reporting of measurement uncertainty (informative annex).
• Documentation: required test record and test report contents are specified (see clauses on information to be recorded and test report).

Practical applications and users

Who uses ISO 10846-5:

• Acoustics and vibration engineers in automotive, shipbuilding, machinery, building isolation and appliance design.
• Test laboratories performing characterization of mounts, engine mounts, building resilient supports, strips and mats.
• Manufacturers and suppliers for product information, product development and quality control.
  What it’s used for:
• Supplying validated low-frequency stiffness data for design calculations of vibration transmission and structure-borne sound.
• Comparing isolator designs, verifying performance under preload, and supporting selection of resilient supports for low-frequency vibration mitigation.

Related standards

• ISO 10846-1 (Principles and guidelines)
• ISO 10846-2 (Direct method for dynamic transfer stiffness)
• ISO 10846-3 (Indirect method)
• ISO 10846-4 (Elements other than translatory supports)
• Normative references used: ISO 2041 (vibration vocabulary), ISO 7626-1 (mechanical mobility), ISO 16063‑21 (calibration), ISO 266 (preferred frequencies)

Keywords: ISO 10846-5, driving point method, dynamic driving-point stiffness, transfer stiffness, resilient supports, low-frequency, vibro-acoustic measurement, laboratory test, preload, accelerometers, force transducers.