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LOW CYCLE FATIGUE LIFE PREDICTION METHOD FOR SINGLE CRYSTAL NICKEL-BASE SUPERALLOYS AT HIGH TEMPERATURE
A low cycle fatigue life prediction method for single crystal nickel-base superalloys at high temperature is presented,and the method can consider the effect of average stress,strain ratio and crystal orientation on fatigue life.Firstly,a fatigue life prediction model is established to predict fatigue life of single c…
无限长带形域内圆孔的反平面响应
ANALYTICAL CALCULATION AND EXPERIMENTAL RESEARCH ON THE BEARING CAPACITY OF FAN-SHAPED HYDROSTATIC THRUST BEARING SUPPLIED WITH CONSTANT OIL FLOW
In the traditional design method of heavy duty hydrostatic rotary table,the influence of centrifugal force has not been considered in the calculation of bearing capacity of fan-shaped hydrostatic thrust bearing supplied with constant oil flow and the adopted simplified calculation method is lack of experimental verifi…
HRB500高强钢筋拉压疲劳性能研究及断口分析
RESEARCH CONCAVE CIRCULAR HOLE TEMPLATE LINEAR VARIABLE THICKNESS STIFFNESS AND STRENGTH THEORIES
This paper studies linear variable thickness circular aperture concave template theory of stiffness and strength calculation.First,set up mechanical model:Template for circular concave,outside the perimeter fixed; center has a round hole,inside the perimeter free,outside under uniformly distributed vertical load.Secon…
FAULT DIAGNOSIS NEW METHOD OF ROLLING BEARING BASED ON ADAPTIVE REDUNDANT LIFTING SCHEME PACKET
Aiming at feature identification of weak signal for rolling bearing fault,an adaptive redundant lifting scheme packet（ ARLSP） diagnostic method of undecimated operation was proposed to solve the faults distortion that caused by traditional wavelet packet or lifting wavelet transform using sample operation.ARLSP was ba…
RESEARCH ON ELASTIC-RING ISOLATOR’S DAMPING BASED ON PIEZOELECTRIC SHUNT DAMPING TECHNIQUE
To analyze the present problems of the elastic-ring isolator,such as the unideal damping effect,the unadjustable damping and so on,the piezoelectric shunt damping technique was adopted to study the vibration control performance of the elastic ring.Using piezoelectric film as a substitute for the damping material of th…
STUDY ON THE ACOUSTO-STRUCTURAL COUPLING OF THIN CYLINDRICAL HYDRAULIC PIPE
In thin hydraulic pipes,the interaction between acoustic field in the fluid and structural wave field may results in more energy loss.In order to make clear the energy loss mechanism of this kind of cylindrical pipe,an analytic study on the acousto-structural coupling of a thin cylindrical pipe is carried out using th…
基于GTN模型的20钢孔洞扩张比数值模拟
16MnR钢的高温疲劳裂纹扩展门槛值研究
电动汽车电池箱结构强度的有限元分析及其改进设计
STUDY ON DESIGN AND TEST OF FULL LOADING DEVICE WITH AUTOMATIC DISPLACEMENT FOR TURNING CENTERS
In order to simulate the actual cutting situation accurately in measuring stiffness of Numerical Control（ NC）machine tool,a novel full loading method is presented.It is based on the changing of the cutting position as the cutting tool is subject to the action of full load of force and torque under machining process.Ac…
切削热对双台肩螺纹加工精度与连接强度影响研究
STRUCTURE AND DISPLACEMENT ANALYSIS FOR COMPLIANT PARALLEL ROBERTS MECHANISM AND MICRO-POSITIONING STAGE
Pseudo-rigid-body model of compliant parallel four-bar mechanism and compliant Roberts mechanism was analyzed and the coupling displacement of it was compared qualitatively. Using closed loop vector method,the characteristic point position of Roberts mechanism was determined. The displacement calculation model was est…
刮板输送机链轮力学特性及疲劳寿命预测
ANALYSIS OF SURFACE TEMPERATURE IN SLIDING CONTACT WITH TWO FRACTAL SURFACES
A three-dimensional sliding model of micro-scale was established between two rough surfaces exhibiting fractal behavior,and the thermo-mechanical coupling factor in the process of contact was considered. The surface temperature in sliding processes was analysed using the finite element analysis taking into account Ti-…
DYNAMIC RESPONSES OF THE ELECTRICAL MEASURING SENSOR AND THE SIMPLY-SUPPORTED BEAM WITH TRANSVERSE MOVING LOAD
The dynamic responses of the beam under the function of the moving loads are very important practical problem in the strength and stiffness designs and the strength and stiffness checks. The measuring technology of the sensors is no doubt one of the ripe methods in the detections of the structural stresses,The reasona…
ANALYSIS OF HIGH SPEED HYDROSTATIC BEARING’S PERFORMANCE CONSIDERING THERMAL EFFECT OF LUBRICATION FLUID
To study the influence to high speed hydrostatic bearing’s performance from lubrication fluid characteristics of oil film,the thermal effect of lubricating fluid’s viscosity,density and specific heat capacity is considered,and put forward a method to solve the Navier-Stokes（ N-S） equations combined with a custom funct…
SAFETY ASSESSMENT OF THE TANK WITH DIFFERENTIAL SETTLEMENT
Generally the settlement of spherical tank’s foundation is difficult to ensure complete uniformity. Especially the foundation has been used for years. There is always a certain differential settlement. Pillar stress of the tank will be uneven under differential settlement. The stress of a LPG spherical tank on use wit…