Design and structural analysis of a low pressure backwash pump for filtration systems
Li, Kefan (2026)
Kandidaatintyö
2026
School of Energy Systems, Konetekniikka
Kaikki oikeudet pidätetään.
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2026051847070
https://urn.fi/URN:NBN:fi-fe2026051847070
Tiivistelmä
This study implemented a high-fidelity finite element analysis (FEA) model incorporating baseplate stiffeners, the motor assembly, and simplified bolted joint modeling to establish a logical transition from simplified analytical estimation to system-level verification. Addressing the stiffness underestimation in the analytical method, where the preliminary fundamental frequency was 13.1 Hz, this research corrected the fundamental frequency to 86.5 Hz by accounting for realistic boundary constraints.
Using the Lanczos algorithm to extract the first ten modes, a cumulative modal mass participation of over 90% was achieved, supporting the dynamic verification requirements of nuclear safety-related equipment. Under SL-2 seismic loading, displacement envelopes confirmed that the maximum dynamic response represents only 2.3% of the design clearance. The results quantitatively validate the structural robustness and functional continuity of the pump unit under extreme operating conditions.
Using the Lanczos algorithm to extract the first ten modes, a cumulative modal mass participation of over 90% was achieved, supporting the dynamic verification requirements of nuclear safety-related equipment. Under SL-2 seismic loading, displacement envelopes confirmed that the maximum dynamic response represents only 2.3% of the design clearance. The results quantitatively validate the structural robustness and functional continuity of the pump unit under extreme operating conditions.