CAJ | 학술논문

据斜向激振模式下振动压实土壤的水平、垂直两方向滞回恢复力与位移间所呈不同滞回形态，考虑土壤密实度较高时振动轮在土壤面层水平方向发生的脱耦打滑、垂直方向发生脱耦跳振现象，采用仅据土壤特性参数的水平对称、垂直不对称滞回模型，分阶段按工况建立系统动力学方程；在一次近似前提下，利用谐波线性法将非线性作用力线性化为等效刚度及等效阻尼。通过数值计算，研究斜向激振下振动轮水平、垂直方向非线性滞回响应及相互耦合特性，分析压实进程中振动轮发生连耦、滑转及跳振工况下响应特性及工况相互转换规律。结果表明，压实进程中合理调整激振参量，一定程度可避免振动轮发生跳振、打滑现象，从而保证压实质量、效率及驾驶舒适性。
거사향격진모식하진동압실토양적수평、수직량방향체회회복력여위이간소정불동체회형태，고필토양밀실도교고시진동륜재토양면층수평방향발생적탈우타활、수직방향발생탈우도진현상，채용부거토양특성삼수적수평대칭、수직불대칭체회모형，분계단안공황건립계통동역학방정；재일차근사전제하，이용해파선성법장비선성작용력선성화위등효강도급등효조니。통과수치계산，연구사향격진하진동륜수평、수직방향비선성체회향응급상호우합특성，분석압실진정중진동륜발생련우、활전급도진공황하향응특성급공황상호전환규률。결과표명，압실진정중합리조정격진삼량，일정정도가피면진동륜발생도진、타활현상，종이보증압실질량、효솔급가사서괄성。
Theresilienceofthedrumofavibrationrollerinhorizontalandverticaldirectionsrevealsahysteresis pattern different from that of the displacement during slant excitation compaction.When the soil compactness is high enough,the jump vibration and slipping of the vibration roller may appear.Considering the two facts mentioned above, kinetic equations under various compaction conditions and at different stages were established in terms of a model with horizontal symmetric hysteretic and vertical asymmetric hysteretic curves according to soil property parameters.According to the first order approximation,the hysteretic resilience was linearlized and its equivalent damping coefficient and equivalent stiffness coefficient were deduced by using the harmonic linearization method. By means of numerical simulation,the hysteresis characteristics under three compaction conditions and correlated coupled properties between horizontal and vertical directions,namely,the contraction vibration,slip-rolling and jump vibration were in turn analyzed, and the traufer between them was revealed.The adjustment of excitation amplitude and excitation frequency could availably restrain the jump vibration and slipping of the drum to ensure the compaction quality,efficiency and driving comfort in the compaction process.