机械研究与应用
機械研究與應用
궤계연구여응용
MECHANICAL RESEARCH & APPLICATION
2014年
4期
1-3,6
,共4页
粗糙度%应力波%接触界面%能量耗损
粗糙度%應力波%接觸界麵%能量耗損
조조도%응력파%접촉계면%능량모손
rough%stress wave%contact interface%energy dissipation
接触界面的刚度和阻尼对机械结构的动态特性有重要影响，为了描述接触界面粗糙度对机械结构动态特性的影响，建立了振动应力波在粗糙接触界面传播的数学模型，并进行了数值仿真和模型试验。试验结果表明：较小的表面粗糙度有利于振动应力波通过接触界面传播；随着粗糙度值的增加，通过接触界面的振动应力波减少，说明较大的粗糙度界面消耗振动能量，但是产生了高次谐波，使振动状态变得复杂。
接觸界麵的剛度和阻尼對機械結構的動態特性有重要影響，為瞭描述接觸界麵粗糙度對機械結構動態特性的影響，建立瞭振動應力波在粗糙接觸界麵傳播的數學模型，併進行瞭數值倣真和模型試驗。試驗結果錶明：較小的錶麵粗糙度有利于振動應力波通過接觸界麵傳播；隨著粗糙度值的增加，通過接觸界麵的振動應力波減少，說明較大的粗糙度界麵消耗振動能量，但是產生瞭高次諧波，使振動狀態變得複雜。
접촉계면적강도화조니대궤계결구적동태특성유중요영향，위료묘술접촉계면조조도대궤계결구동태특성적영향，건립료진동응력파재조조접촉계면전파적수학모형，병진행료수치방진화모형시험。시험결과표명：교소적표면조조도유리우진동응력파통과접촉계면전파；수착조조도치적증가，통과접촉계면적진동응력파감소，설명교대적조조도계면소모진동능량，단시산생료고차해파，사진동상태변득복잡。
Contact interface stiffness and damping have an important influence on dynamic characteristics of the mechanical structure. In order to study on contact interface rough effect on dynamic characteristic of machinery, the model of vibration stress wave propagation was established in this paper. The test results show that small surface rough is benefit for vibration stress wave reducing through contact interface, with the surface rough increase, vibration stress wave reducing through contact interface. The larger roughness is benefit to impede vibration stress wave propagation at contact interface, but higher harmonic would be produced and the vibration state becomes complicated.
