| Compared to nuclear power technology with the traditional thermal power Generation, nuclear power is an important new energy which can be large-scale production, and its role become increasingly highlight with fossil fuels reduction and heavy pollution.nuclear cooling pumps is a main equipment of nuclear reactor cooling system, so it’s put forward a very high requirements of safety and reliability. This paper mainly research vibration and noise problem of ACP1000 nuclear component cooling water pump, and the pump steady and unsteady flow field, pump casing free modal response,internal sound field and external radiation sound field were comprehensively analyzed, finally the test measurement global noise were compared so as to provide a theoretical analysis for vibration and noise optimization of the cooling pump, and improve the safety of nuclear component cooling pumps.(1).Conclude the 1000-MW-class nuclear power technology development and localization process, mainly introduces the properties and applications of the pump, and concludes the current research of the cooling pumps in the fluid noise research status and the simulation calculation of pump noise.(2). According the design parameters of cooling water pump hydraulic design and numerical simulation calculation, to carry on the analysis of the internal flow field of the cooling water pump, and verify whether the hydraulic design structure is good to meet the requirements. At last, Unsteady computation is carried out later based on the steady results.(3). Taking the steady flow field of the pump as the unsteady initial flow field, and the monitoring points of the pump are set to analyze the pressure change of the volute and impeller by the unsteady calculation. The law of pressure fluctuation under different working conditions and the reason of the emergence was compared. Based on the pump casing model of the cooling water pump, the natural frequency and the main vibration mode of the pump shell are obtained by free vibration mode calculate.(4) Introduces the sound basic calculation equation and acoustic measurement principle and the basic knowledge, compared the advantages and disadvantages of two sound field calculation method BEM and FEM. Then on the basic of LMS virtual. Lab acoustic BEM module, calculating the far field sound pressure level distribution and frequency response function in two types sound source and compared the calculation result, which based on the interior sound calculation model of impeller and volute sound source field.(5) the acoustic vibration coupling between internal sound field result and vibration modes of the pump casing was used to calculated external radiation sound field. The radiation sound field level distribution and the compared simulation calculated results with test result was monitored by far field point to verify the reliability of the simulation and for further optimization of noise and vibration provides theoretical guidance. |
