本文選題：雙鋼輪振動(dòng)壓路機(jī) + 非線性跳振模型�。� 參考：《鄭州大學(xué)學(xué)報(bào)(工學(xué)版)》2017年02期

【摘要】：根據(jù)雙鋼輪振動(dòng)壓路機(jī)的整機(jī)結(jié)構(gòu)特點(diǎn)和雙激振工作特性,充分考慮前后隨振土對(duì)壓實(shí)系統(tǒng)的非線性振動(dòng)耦合,建立了7自由度動(dòng)力學(xué)跳振模型,基于周期內(nèi)連耦—脫耦—再連耦的分解思路,以YZC12型壓路機(jī)為算例,分析在平穩(wěn)接觸、輕微碰撞和強(qiáng)烈碰撞3種不同壓實(shí)工況下系統(tǒng)的非線性振動(dòng)響應(yīng).結(jié)果表明,前后輪跳振產(chǎn)生的運(yùn)動(dòng)偏移量是產(chǎn)生傳動(dòng)干擾的主要原因,隨著代表不同密實(shí)度的壓實(shí)進(jìn)程土壤參數(shù)變化,系統(tǒng)時(shí)域波形出現(xiàn)簡(jiǎn)諧波式畸變,一階、二階和四階頻譜出現(xiàn)分?jǐn)?shù)倍亞諧波和高次超諧波非線性響應(yīng)直至進(jìn)入混沌,同時(shí)行駛速度主要影響前后隨振土的力學(xué)參數(shù),進(jìn)而影響前后輪的運(yùn)動(dòng)差異.通過主動(dòng)控制機(jī)架與振動(dòng)輪的一級(jí)減振系統(tǒng)參數(shù)可以明顯弱化系統(tǒng)的非線性振動(dòng)響應(yīng)和前后輪的壓實(shí)傳動(dòng)干擾.
[Abstract]:According to the structural characteristics of the double steel wheel vibratory roller and the working characteristics of the double excitation vibration, a 7 DOF dynamic vibration hopping model is established by fully considering the nonlinear vibration coupling of the front and rear vibrational soil to the compaction system. Taking YZC12 roller as an example, the nonlinear vibration response of the system under three different compaction conditions, namely stationary contact, slight impact and strong impact, is analyzed based on the idea of decomposition of continuous coupling, decoupling and recoupling within the period. The results show that the movement offset caused by the front and rear wheel vibration is the main reason for the transmission interference. With the change of soil parameters representing different compaction degrees, the time-domain waveform of the system appears harmonic distortion, first order. The second and fourth order frequency spectra show fractional subharmonic and high order super harmonic nonlinear response until they enter chaos. At the same time the driving speed mainly affects the mechanical parameters of the front and rear wheels and then the difference of the front and rear wheels. The nonlinear vibration response of the system and the compaction drive interference of the front and rear wheels can be obviously weakened by the parameters of the first-order damping system of the active control frame and the vibration wheel.
【作者單位】： 福建船政交通職業(yè)學(xué)院機(jī)械工程系;福州大學(xué)機(jī)械工程及自動(dòng)化學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51175086) 福建省高校杰出青年科研人才培育計(jì)劃資助項(xiàng)目(JA11299) 福建省自然科學(xué)基金資助項(xiàng)目(2015J01186)
【分類號(hào)】：U415.521

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