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聚焦式超聲懸浮機(jī)構(gòu)仿真與試驗(yàn)
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    摘要:

    在建立超聲懸浮機(jī)構(gòu)有限元模型的基礎(chǔ)上，計(jì)算了懸浮機(jī)構(gòu)的固有頻率。應(yīng)用有限元諧響應(yīng)分析理論和技術(shù)，分別計(jì)算了平板式和聚焦式諧振腔的聲壓分布及聲場特性。結(jié)果表明，在相同激勵條件下，聚焦式超聲懸浮的聲壓較大，表明聚焦式超聲懸浮能有效提高懸浮系統(tǒng)的懸浮性能；同時分析了聚焦式超聲懸浮系統(tǒng)不同長度諧振腔下的聲壓分布和聲場特性，通過自行研制的超聲懸浮系統(tǒng)，進(jìn)行了相應(yīng)的試驗(yàn)，驗(yàn)證了仿真結(jié)果的正確性。

    Abstract:

    A three-dimensional parametric model of focusing ultrasonic levitation was built up with Pro/E, and a forth-symmetry finite element model of harmonic chamber was established based on the symmetry of harmonic chamber. The key working parameters of ultrasonic levitation were obtained by the modal analysis, and the harmonic analysis of the chamber model was carried out. The results showed that the capability of focusing levitation was better. Subsequently, the author analyzed the distributions and characteristics of the acoustic field in the chamber with various sizes. The corresponding experiments were carried out with the ultrasonic levitation system. The results indicate that the working properties parameters are in agreement with the simulated results. 

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高建民,諶志偉,任寧.聚焦式超聲懸浮機(jī)構(gòu)仿真與試驗(yàn)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2008,39(9):64-67.[J]. Transactions of the Chinese Society for Agricultural Machinery,2008,39(9):64-67.

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