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BS ISO 20155:2017 Ships and marine technology. Test method of flow induced in-pipe noise source characteristics for a ship-used pump >
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BS ISO 20155:2017 Ships and marine technology. Test method of flow induced in-pipe noise source characteristics for a ship-used pump, 2017
- National foreword
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Two-port source model and test method of source characteristic of pump
- 4.1 Two-port source model of a pump
- 4.2 Test methods for source characteristic parameters of the pump
- 5 Test rig
- 5.1 Test loop
- 5.2 Installation of test pump
- 5.3 Ground foundation and supporting structure
- 5.4 Test-bed pipeline
- 5.5 Test section
- 5.6 Throttling valve
- 5.7 Secondary acoustic exciter
- 5.8 Water tank
- 6 Instrumentation
- 6.1 General
- 6.2 Static measurements
- 6.3 Dynamic measurements
- 7 Test preparation
- 8 Test procedure
- 9 Data processing
- 9.1 General
- 9.2 Passive characteristic of noise source
- 9.3 Active characteristic
- 10 Evaluation criteria for the test result
- 11 Test report
- 11.1 Overview
- 11.2 General information
- 11.3 Test record
- 11.4 Test result
- Annex A (informative) Theoretical models of a two-port source and transformation mutually between matrix Z, S, T
- Annex B (informative) Evaluation of quantities at inlet and outlet ports
- Annex C (informative) Judgment of effectiveness for the test
- Annex D (informative) Formulae for determining passive characteristics of noise source
- Annex E (informative) Formulae for determining active characteristics of source
- Annex F (informative) Verification of test method taking a T-shaped sound excitor as a two-port acoustic source
- Bibliography [Go to Page]