本文關(guān)鍵詞： 超阻尼 高剛度 負(fù)剛度 隔振　出處：《振動與沖擊》2017年09期 　論文類型：期刊論文

【摘要】：為能夠隔離作用在負(fù)載上的直接擾動并提高系統(tǒng)的阻尼特性以避免產(chǎn)生共振,提出一種采用磁性負(fù)剛度機(jī)構(gòu)設(shè)計的超阻尼隔振系統(tǒng),其由磁性負(fù)剛度機(jī)構(gòu)和兩對相互對壓的機(jī)械彈簧并聯(lián)構(gòu)成;磁性負(fù)剛度機(jī)構(gòu)由五塊沿軸向磁化的環(huán)形永磁體構(gòu)成,傾斜環(huán)形永磁體被對稱地固定在基礎(chǔ)上,運動的環(huán)形永磁體由對壓的機(jī)械彈簧約束,并沿軸向發(fā)生相對運動;根據(jù)電流模型,推導(dǎo)了磁性負(fù)剛度機(jī)構(gòu)的磁性恢復(fù)力以及磁性負(fù)剛度解析表達(dá)式;通過將隔振系統(tǒng)中的剛度單元和阻尼單元重新布置并引入一個內(nèi)部隱性自由度,該系統(tǒng)被設(shè)計成與線性參考系統(tǒng)具有相同靜剛度、相同質(zhì)量以及相同阻尼的超阻尼裝置;分析了該裝置中剛度單元、阻尼單元以及永磁體附加質(zhì)量對所設(shè)計系統(tǒng)阻尼、固有頻率和主系統(tǒng)振動響應(yīng)的影響。研究結(jié)果表明,所提出的隔振系統(tǒng)具有高剛度和超阻尼特性,能夠有效抑制主系統(tǒng)的振動;在高頻段,主系統(tǒng)的響應(yīng)將收斂于線性參考系統(tǒng)。
[Abstract]:In order to isolation effect on load disturbance directly and improve the damping characteristic of the system to avoid resonance, a magnetic negative stiffness mechanism design of super damping system, which is composed of magnetic negative stiffness mechanism and two of each of the mechanical spring parallel pressure; magnetic negative stiffness mechanism by five ring along the axial magnetized permanent magnet structure, inclined ring-shaped permanent magnets are symmetrically fixed on the basis of movement of the annular permanent magnet by mechanical spring constraint on the pressure, and the relative movement along the axial direction; according to the current model, deduces the magnetic magnetic negative stiffness mechanism of the restoring force and magnetic negative stiffness analysis expression; by stiffness and damping vibration unit unit vibration system in the re arrangement and the introduction of a tacit degree of freedom, the system is designed with the linear reference system has the same static stiffness, the same quality and the same Super damping device damping; analysis of stiffness element in the device, a damping unit and a permanent magnet attached to the design quality of the system damping effect of natural frequency and main vibration response of the system. The results show that the vibration isolation of the proposed system has high stiffness and damping, vibration can effectively restrain the main system the main; in high frequency band, the response of the system will converge to the linear reference system.

【作者單位】： 西安交通大學(xué)航天航空學(xué)院機(jī)械結(jié)構(gòu)強(qiáng)度與振動國家重點實驗室;
【基金】：國家自然科學(xué)基金項目(11172225)
【分類號】：TB535.1

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本文編號：1537477