CAJ | 학술논문

　　数值模拟燃料电池车用旋涡风机壳体的结构振动辐射噪声。首先给出燃料电池车上旋涡风机运行时振动噪声测量结果，然后使用Fluent模拟风机内部三维非定常流场，将作用在壳体表面的非定常力加载到壳体模型，使用Nastran对壳体进行动力响应计算，实现气体到结构的单向耦合。接着使用Virtual. Lab模拟风机壳体振动向外辐射的噪声，将试验测量和数值计算结果进行对比，表明此方法能够较为准确地模拟壳体的振动辐射噪声。最后采用这一方法研究散热片及结构阻尼对风机振动辐射噪声的影响。结果表明：无散热片以及增大结构阻尼系数可以降低漩涡风机壳体辐射噪声。
　　수치모의연료전지차용선와풍궤각체적결구진동복사조성。수선급출연료전지차상선와풍궤운행시진동조성측량결과，연후사용Fluent모의풍궤내부삼유비정상류장，장작용재각체표면적비정상력가재도각체모형，사용Nastran대각체진행동력향응계산，실현기체도결구적단향우합。접착사용Virtual. Lab모의풍궤각체진동향외복사적조성，장시험측량화수치계산결과진행대비，표명차방법능구교위준학지모의각체적진동복사조성。최후채용저일방법연구산열편급결구조니대풍궤진동복사조성적영향。결과표명：무산열편이급증대결구조니계수가이강저선와풍궤각체복사조성。
Numerical simulation of radiation noise of the vibrating shell structure of a regenerative blower in fuel cell vehicle was performed. The experiment results of vibration and noise of the regenerative blower in the fuel cell vehicle were given. Unsteady pressure on the shell surface was obtained from the blower’s internal flow field calculation by using Fluent code. And then pressure was loaded to the shell’s finite element model for its dynamic response analysis by using Nastran with the unidirectional gas-solid coupling effect considered. The radiation noise prediction for the acoustic model was made by Virtual.Lab. Based on the numerical method above, the effects of radiating fins and structure damping on noise radiation were studied. The results show that radiation noise can be reduced by removing the radiating fins and increasing the structural damping.