CAJ | 학술논문

工程车辆单气室油气不分离式油气悬架内随油液流动进入环形腔的气体，在环形腔内溶解析出会对油气悬架性能产生一定的影响。为此，文中建立以环形腔内气体体积为判断导向的油气悬架非线性数学模型，采用联合模拟仿真的方法求解非线性方程组，分析环形腔内气体溶解析出对环形腔内压力变化的影响，并搭建等比例油气悬架试验台进行验证。仿真结果和试验结果对比表明：文中建立的数学模型能够准确地描述环形腔内气体溶解析出变化对油气悬架性能的影响；环形腔内气体溶解析出在油气悬架设计和使用过程中不可忽略；在此影响过程中气体溶解度和油气悬架外加激励的作用明显；环形腔内气体溶解析出变化对油气悬架簧上质量相对位移的影响有限，但对油气悬架内部结构的冲击、振动强度及寿命有较大的影响。
공정차량단기실유기불분리식유기현가내수유액류동진입배형강적기체，재배형강내용해석출회대유기현가성능산생일정적영향。위차，문중건립이배형강내기체체적위판단도향적유기현가비선성수학모형，채용연합모의방진적방법구해비선성방정조，분석배형강내기체용해석출대배형강내압력변화적영향，병탑건등비례유기현가시험태진행험증。방진결과화시험결과대비표명：문중건립적수학모형능구준학지묘술배형강내기체용해석출변화대유기현가성능적영향；배형강내기체용해석출재유기현가설계화사용과정중불가홀략；재차영향과정중기체용해도화유기현가외가격려적작용명현；배형강내기체용해석출변화대유기현가황상질량상대위이적영향유한，단대유기현가내부결구적충격、진동강도급수명유교대적영향。
In the single chamber-type hydro-pneumatic suspension of construction vehicles,some gas flows into ring cavity with liquid,and the gas dissolution and precipitation in the ring cavity can affect the suspension performance to some extent.In order to reveal the effect mechanism,a nonlinear mathematical model of hydro-pneumatic suspension is established on the basis of gas volume in the ring cavity.In this model,a co-simulation method is used to solve nonlinear equations so as to analyze the effect of the gas dissolution and precipitation in the ring cavity on the pressure.Furthermore,an equally-proportional hydro-pneumatic suspension test bench is set up to verify the co-simulation results.Comparison between the co-simulation and experimental results indicates that (1 )the pro-posed model can accurately describe the effect of the gas dissolution and precipitation in ring cavity on the suspen-sion performance and the effect should not be ignored in the design and application of this kind of suspension;(2)the gas solubility and the external stimulation play an important role in the effect;and (3)the gas dissolution and precipitation have a small effect on the suspension spring quality but have strong effects on the impact,vibra-tion strength and durability of internal structure of the hydro pneumatic suspension.