搜索结果: 31-45 共查到“知识库 机械摩擦、磨损及润滑”相关记录116条 . 查询时间(3.844 秒)
Multi-axial Fatigue of 2024-T4 Aluminum Alloy
2024-T4 aluminum alloy fatigue life loading path multiaxial fatigue
2011/1/4
Only the fatigue initiation is considered by the safe-life design approach, while fatigue crack propagation is paid more attention by the damage tolerance approach. The reasonable fatigue design metho...
Magnetohydrodynamic flow in a channel with varying viscosity under transverse magnetic field
Variable viscosity electrically conducting fluid
2010/12/30
Flow of a viscous, incompressible, electrically conducting fluid with varying viscosity through a channel in the presence of a transverse magnetic field is studied in this paper. In the special case i...
摩擦作用下周期双参变激励齿轮系统非线性振动响应研究
齿轮 非线性振动 动力学 摩擦
2010/12/24
研究了周期双参变激励齿轮系统在摩擦作用下的动力学响应,建立了考虑轮齿时变啮合刚度和齿间摩擦的单自由度扭转非线性振动模型,研究了摩擦因子、重合度、惯量比、刚度因子、阻尼因子、载荷分配系数等参数对齿轮系统非线性振动响应的影响。研究结果表明：摩擦对周期双参变激励齿轮系统非线性振动有重要的影响。
Design and Characterization of a Novel Zaxis Quartz Crossfork Micromachined Gyroscope
quartz gyroscope crossfork crossfork
2010/11/30
The existing researches on quartz gyroscope mainly focus on the structure design of the tuning fork, which aim at obtaining a better vibration characterization.
Neuro-sliding mode control of piezo-positioning mechanism
Neuro-Sliding mode Piezo-positioning mechanism LuGre model
2010/11/25
In this work, a Neuro-Sliding mode controller (NSMC) for piezo-positioning mechanism (PEA) was designed. This controller takes into account parameter uncertainties and unknown external disturbances. T...
通过建立单节弹簧单元受力模型,分析了长弧形螺旋弹簧在加载和卸载工况下的扭矩负载特性及影响因素。研究表明：弹簧在工作时处于非均匀压缩状态,具有非线性动态迟滞,且发动机转速及摩擦因数越大,迟滞效应越大。在此基础上,仿真计算了双质量飞轮与传统离合器从动盘式扭转减振器的动态响应,仿真结果表明:双质量飞轮可大幅度降低变速箱输入轴振动响应,从而降低传动系统的振动噪声。
Practical Method of Conical Cam Outline Expansion
oscillating follower conical cam 3D expansion polar coordinates curve equation
2010/10/14
Conical cam mechanism has been widely used in modern machinery and equipment. However, the commonly used planar expansion methods for the design of spatial cam contour produce significant errors, beca...
Incoloy800合金的高温微动磨损特性
核电材料 Incoloy800合金 蒸汽发生器 高温 微动磨损
2010/8/1
采用PLINT高温微动磨损试验机，研究核电用管材Incoloy800合金的高温微动磨损机制和动力学特性。Incoloy800合金圆管试件与0Cr18Ni9不锈钢配副件圆柱体在水平面上垂直交叉接触，控制法向载荷为80 N、位移幅值为2~20 μm、循环次数为3×104次，在不同温度(25 ℃、300 ℃和400 ℃)下进行微动磨损试验。结果表明：当载荷、温度一定时，随着位移幅值的增大，Incoloy...
New Method to Measure the Fill Level of the Ball Mill I—Theoretical Analysis and DEM Simulation
ball mill fill level discrete element method (DEM) simulation
2010/6/11
Up to now, the accurate measurement of the fill level in the ball mill hasn’t been resolved because of the interplay of many variable factors, which led the mill to be operated under the uneconomical ...
Entrance Effect on Load Capacity of Orifice Compensated Aerostatic Bearing with Feeding Pocket
aerostatic thrust bearing feeding pocket entrance effects
2010/6/11
The current research of the aerostatic thrust bearing mainly focuses on the porous material bearing and inherent compensated air bearing, which aims at obtaining small physical dimension and large loa...
Comparative Study on the Complex Eigenvalue Prediction of Brake Squeal by Two Infinite Element Modeling Approaches
friction brake squeal noise finite element
2010/4/30
The complex eigenvalue analysis is currently a common approach to predict squealing vibration and noise. There are two methods for modeling friction contact in the complex eigenvalue analysis of frict...
Optimization Algorithms for Fully Automatic Optimizing Cross-cut Saw
optimizing cross-cut saw optimization optimization mode
2010/4/29
The optimization of boards by grades plays an important role in the production for cross cutting boards, and the outturn rate and utilization of boards are directly affected by the optimization result...
机械密封摩擦副端面接触分形模
端面 分形模型 接触面积
2009/11/25
依据分形理论，研究了机械密封摩擦副端面间的真实接触状况，建立了机械密封摩擦副端面接触分形模型。得到了机械密封摩擦副端面微接触点的面积分布、临界弹性变形微接触面积、临界塑性变形微接触面积、量纲1真实接触面积的数学表达式。采用数值计算方法得到了GY70型机械密封摩擦副端面间的量纲1真实接触面积与端面比载荷的关系曲线。结果表明，真实接触面积随着密封端面比载荷的增加而近似呈线性增加;在相同比载荷下，真实接...
偏心盘和摆杆摩擦副的选材和工艺
偏心盘 摆杆 可锻铸铁
2009/11/17
针对无级变速器偏心盘和摆杆高速摩擦副的工作特性，在选材和加工工艺上，首次将可锻铸铁和中碳钢应用到摩擦副中，零件耐磨性和经济性取得了理想效果。