华南理工大学学报（自然科学版）
華南理工大學學報（自然科學版）
화남리공대학학보（자연과학판）
Journal of South China University of Technology(Natural Science Edition)
2015年
8期
91-98
,共8页
半主动减振器%先导阀%溢流阀%计算流体动力学%有限元分析
半主動減振器%先導閥%溢流閥%計算流體動力學%有限元分析
반주동감진기%선도벌%일류벌%계산류체동역학%유한원분석
semi-active damper%pilot valve%relief valve%computational fluid dynamics%finite element analysis
利用计算流体动力学(CFD)方法,获得了液动力、粘性力对先导阀芯位置的影响规律,反映了阀芯在减振器流量范围内呈现高频、低幅值的振动现象,分析了先导阀保持稳态位置和快速动态响应的关键因素.在溢流阀分析方面,建立了环形薄板在集中载荷、局部分布载荷、全局分布载荷作用下的几何非线性偏微分方程,指出了集中载荷和局部分布载荷按照双曲正切函数或者幂函数等效分布的规律,并利用有限元方法分析了溢流阀的瞬态开度规律.最终,基于相关数学模型、CFD计算结果和有限元分析仿真结论建立了整体的计算模型,并将整体流量仿真结果与实验结论进行了对比.结果表明,理论和实验具有较好的一致性,理论分析方法可行.
利用計算流體動力學(CFD)方法,穫得瞭液動力、粘性力對先導閥芯位置的影響規律,反映瞭閥芯在減振器流量範圍內呈現高頻、低幅值的振動現象,分析瞭先導閥保持穩態位置和快速動態響應的關鍵因素.在溢流閥分析方麵,建立瞭環形薄闆在集中載荷、跼部分佈載荷、全跼分佈載荷作用下的幾何非線性偏微分方程,指齣瞭集中載荷和跼部分佈載荷按照雙麯正切函數或者冪函數等效分佈的規律,併利用有限元方法分析瞭溢流閥的瞬態開度規律.最終,基于相關數學模型、CFD計算結果和有限元分析倣真結論建立瞭整體的計算模型,併將整體流量倣真結果與實驗結論進行瞭對比.結果錶明,理論和實驗具有較好的一緻性,理論分析方法可行.
이용계산류체동역학(CFD)방법,획득료액동력、점성력대선도벌심위치적영향규률,반영료벌심재감진기류량범위내정현고빈、저폭치적진동현상,분석료선도벌보지은태위치화쾌속동태향응적관건인소.재일류벌분석방면,건립료배형박판재집중재하、국부분포재하、전국분포재하작용하적궤하비선성편미분방정,지출료집중재하화국부분포재하안조쌍곡정절함수혹자멱함수등효분포적규률,병이용유한원방법분석료일류벌적순태개도규률.최종,기우상관수학모형、CFD계산결과화유한원분석방진결론건립료정체적계산모형,병장정체류량방진결과여실험결론진행료대비.결과표명,이론화실험구유교호적일치성,이론분석방법가행.
This paper deals with the influences of the flow force and the viscous force on the final positions of a pilot valve by means of the CFD method.It describes the high-frequency low-amplitude vibration of the valve in the range of the damper flow and discusses the key factors which cause the pilot valve to keep a steady position and a rapid dy-namic response.For the relief valve, the geometrically-nonlinear partial differential equations of the annular plate un-der the concentrated, partially-distributed and globally-distributed loads are established.Then, it is pointed out that the distribution laws of the concentrated and partially distributed forces can be equivalently described by using the hy-perbolic tangent function or the power function.Furthermore, the FEA method is used to analyze the dynamic behav-ior of the relief valve.Finally, according to relevant mathematic models, CFD results and FEA conclusions, an inte-grated model is constructed, and the calculated results are compared with the experimental ones.It is found that the theoretical analysisis consistent with the experimental results and that the theoretical methods are feasible.
