CAJ | 학술논문

应用Altair Hyperworks 的OptiStruct优化模块,采用拓扑优化技术,对某柴油机正时齿轮罩进行了优化,得到了最佳的质量分布,据此进行了结构改进,使该正时齿轮罩的模态振型避开正时轮系啮合激励频段,进而降低辐射噪声.通过有限元法和边界元法联合求解得知新正时齿轮罩辐射声功率降低了2.4dB,对比实验验证了计算结果.
응용Altair Hyperworks 적OptiStruct우화모괴,채용탁복우화기술,대모시유궤정시치륜조진행료우화,득도료최가적질량분포,거차진행료결구개진,사해정시치륜조적모태진형피개정시륜계교합격려빈단,진이강저복사조성.통과유한원법화변계원법연합구해득지신정시치륜조복사성공솔강저료2.4dB,대비실험험증료계산결과.
The optimization of timing gear cover was carried by using Altair Hyperworks, to gain the optimal mass distribution. Hereby, the structural modification was performed. The mode of timing gear cover avoided the frequency range of timing gear train excitation, to reduce the radiated noise. In order to calculate radiated sound power of timing gear cover, the finite element method (FEM) and boundary element method (BEM) were used. The calculating result shows that the radiated sound power on new timing gear cover decrease by 2.4dB, which was validated by the verification test.