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拓?fù)鋬?yōu)化技術(shù)在降低正時(shí)齒輪罩輻射噪聲中的應(yīng)用
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Low Noise for Timing Gear Cover Based on Topology Optimization
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    摘要:

    應(yīng)用Altair Hyperworks 的OptiStruct優(yōu)化模塊,，采用拓?fù)鋬?yōu)化技術(shù),，對(duì)某柴油機(jī)正時(shí)齒輪罩進(jìn)行了優(yōu)化，得到了最佳的質(zhì)量分布,，據(jù)此進(jìn)行了結(jié)構(gòu)改進(jìn),，使該正時(shí)齒輪罩的模態(tài)振型避開(kāi)正時(shí)輪系嚙合激勵(lì)頻段,，進(jìn)而降低輻射噪聲。通過(guò)有限元法和邊界元法聯(lián)合求解得知新正時(shí)齒輪罩輻射聲功率降低了2.4dB,，對(duì)比實(shí)驗(yàn)驗(yàn)證了計(jì)算結(jié)果,。

    Abstract:

    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. 

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方華,王天靈,李盛成.拓?fù)鋬?yōu)化技術(shù)在降低正時(shí)齒輪罩輻射噪聲中的應(yīng)用[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2009,40(12):48-50. Low Noise for Timing Gear Cover Based on Topology Optimization[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(12):48-50.

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