Test & measurement Building silent vessels


To help ship builders meet increasing demands to reduce the impact of noise on marine life, Técnicas y Servicios de Ingeniería (TSI) has obtained technology especially for the construction of ‘silent vessels’. In addition to environmental effects, the health of staff and the vessels themselves can also be affected by a loud ship. Noise is often an indicator of onboard vibration problems that can lead to equipment and system damage. In response to these issues, TSI has invested in state-of-the-art technology from noise specialist, Hottinger Brüel & Kjær (HBK) which enables measurement of the exterior noise generated by all types of ships; in particular, underwater radiated noise (URN) and its impact on marine fauna and ecosystems.


competitive top-level services adapted to the needs of its customers, TSI has been certified as a Service Supplier by different classification societies to carry out vibration and noise measurements worldwide. After more than 35 years offering solutions


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and services in the field of machine and structural dynamics and acoustics, TSI has become an international benchmark in the measurement and analysis of noise and vibration, as well as in the domain of dynamic and shock testing. TSI’s work can be critical for its customers since the correct interpretation and analysis of measurements made on rotating machinery and structures allows incipient faults to be detected early, reducing the costs of maintenance and repair. TSI relies on Hottinger Brüel & Kjær (HBK) products to carry out vibration, noise, thermographic, ultrasound and endoscopic analysis. The company can also assess the condition of machinery, optimising preventive maintenance and reducing corrective maintenance. TSI is also very active within Factory


Acceptance Testing (FAT), using HBK products for this validation process. FATs are sets of tests that are carried out in the manufacturers’ facilities, where the noise and vibration of machines are assessed before being integrated into larger systems such as ships or industrial plants. Similarly, Site Acceptance Tests (SAT) are performed at customer sites – the final location of the equipment. Even though FAT and SAT tests are not always mandatory, they are included in the many contractual specifications outlined by the buyers of the equipment. Furthermore, these tests are considered as good practice providing quality


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ince 1983, TSI (Técnicas y Servicios de Ingeniería) has been providing noise and vibration specialist services for the engineering industry. With the aim of providing effective and


control and verification points of the activities completed during the engineering design stages. Other services offered by TSI include


acceleration measurements for applications such as the design of anti-shock supports for electronic equipment consoles, for example, located in structures that are subject to high levels of vibration, as well as some specific dynamic tests based on the identification of modal parameters obtained from acceleration records in certain degrees of freedom of the structure, which must be independent and in sufficient number to characterise its movements. TSI services also include measurements of


torsional, axial and lateral vibrations of lines of shafting, dynamic balancing of rotating machinery, and alignment corrective tasks. Acoustic analysis studies, sound pressure measurements, sound insulation measurements, impact noise measurements, sound intensity measurements, acoustic audits, reverberation time measurements, etc., are also part of TSI’s offering, and aimed at verifying whether the measured levels comply with the noise thresholds stipulated by legislation, and the specifications and requirements set out in the technical specification sheets that may govern a contract. In addition to all this, TSI uses state-of-the-


art HBK technology to measure the exterior noise generated by all types of ships, in particular, underwater radiated noise (URN) and its impact on marine fauna and ecosystems. In fact, URN has become one of the current major technological challenges of civil shipbuilding, since noise is considered a pollutant, and the industry must comply with the increasingly demanding requirements of the European Union Directives, maritime institutions, and the scientific community. Thanks to TSI and HBK technology, Spanish civil shipbuilding is now more aware of this issue. This has led to an advance in the reduction of the underwater acoustic impact in new ship


March 2022 Instrumentation Monthly


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