Estimation of the frequency response functions for operational assemblies using independent source characterization

Ocepek, Domen (avtor), Vrtač, Tim (avtor), Čepon, Gregor (avtor), Boltežar, Miha (avtor)

In noise and vibration engineering, a structure’s passive dynamic properties are often evaluated in terms of its frequency response functions (FRFs). The typical FRF measurement campaign consists of controlled structure excitation and the capturing of its response. However, exploiting operational excitation for FRF acquisition is not feasible, with many sources simply too complex to model or measure directly. In the present paper, an alternative approach is proposed for an indirect FRF estimation of a system in operation, in which the source is characterized independently of the final assembly. To overcome the issue of the unmeasurable excitation force, transfer path analysis (TPA) methods are proposed. TPA replicates the source excitations using the set of equivalent or pseudo forces that are an inherent property of the source. The assembly’s FRFs are then evaluated on the basis of receiver responses and pre-determined pseudo forces for independent operational load cases at the source. Thus, a single source description can be applied to estimate the FRFs of any assembly with an identical source and arbitrary passive side.

• Jezik: Angleški jezik
• Ključne besede: frequency response function, source characterization, transfer path analysis, operational excitation, force transferability
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Recenzirani rokopis
• Datum objave: 15.07.2022
• Leto izida: 2023
• Št. strani: 14 str.
• Številčenje: Vol. 182, art. 109542
• PID: 20.500.12556/RUL-138802
• UDK: 534.141
• ISSN pri članku: 0888-3270
• DOI: 10.1016/j.ymssp.2022.109542
• COBISS.SI-ID: 118438147
• Datum objave v RUL: 18.08.2022

Gradivo je del revije

• Naslov: Mechanical systems and signal processing
• Skrajšan naslov: Mech. syst. signal process.
• Založnik: Elsevier
• ISSN: 0888-3270
• COBISS.SI-ID: 169243

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: frekvenčna prenosna funkcija, karakterizacija vira vzbujanja, analiza prenosnih poti, obratovalno vzbujanje, prenosljivost obratovalne sile

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0263
• Naslov: Mehanika v tehniki

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: N2-0144
• Naslov: Optična metoda za obratovalno identifikacijo reduciranega nelinearnega modela