CAJ | 학술논문

为了解决发动机辐射噪声计算的精度和效率问题，基于表面速度振动原理，利用Matlab程序，开发了一种高效的发动机辐射噪声声功率模拟计算软件。分别用边界元法、快速多级边界元法和Matlab程序软件对比分析了普通平板、发动机缸盖罩和发动机动力总成辐射声功率的计算精度和效率，结果显示，在保证高的计算精度情况下，用Matlab程序软件计算发动机缸盖罩辐射声功率的效率是边界元法的25倍，是快速多级边界元法的123倍；用Matlab程序软件计算发动机动力总成辐射声功率的效率是边界元法的141倍，是快速多级边界元法的108倍。
위료해결발동궤복사조성계산적정도화효솔문제，기우표면속도진동원리，이용Matlab정서，개발료일충고효적발동궤복사조성성공솔모의계산연건。분별용변계원법、쾌속다급변계원법화Matlab정서연건대비분석료보통평판、발동궤항개조화발동궤동력총성복사성공솔적계산정도화효솔，결과현시，재보증고적계산정도정황하，용Matlab정서연건계산발동궤항개조복사성공솔적효솔시변계원법적25배，시쾌속다급변계원법적123배；용Matlab정서연건계산발동궤동력총성복사성공솔적효솔시변계원법적141배，시쾌속다급변계원법적108배。
In order to solve the engine radiated noise problems accurately and efficiently,a Matlab program was developed here based on the surface vibration velocity method to calculate the radiated sound power.Several numerical examples including simple plate,engine head cover and engine powertrain were used to compare the accuracy and efficiency of the boundary element method,the fast multipole boundary element method and the Matlab program software. Results showed that for engine head cover and engine powertrain radiated sound power analysis problems,the comsumed time for the calculation with the Matlab program developed here is 1/123 or 1/108 of that with the fast multi-pole boundary element method,and 1/25 or 1/141 of that with the boundary element method,under the condition keeping a high calculation accuracy.