Numerical Simulation for Pin Impact Stress Analysis based on Ansys/ LS-dyna 基于ANSYS/LS-DYNA的击针撞击应力数值仿真
The average impact acceleration and average impact stress of sled train increase approximately in a line with the increase of track deviation. 随着轨道偏差的增大,橇车平均冲击加速度和平均冲击力近似呈线性增长;
My doctor mentioned the impact stress could have on the immune system. 我医生提过压力影响免疫系统。
Analysis of the Impact Stress during Dynamic Compaction on Collapsible Loess 对湿陷性黄土在强夯作用下冲击应力的分析
The maximum impact velocity and impact energy are determined. Based on the Hertz elastic contact theory, formulas to calculating the impact stress, the contact duration and the radius of the contact area are deduced. 推导了球磨机中磨球的最大冲击速度和冲击功计算公式,依据Hertz弹性接触理论计算了磨球的最大冲击应力、冲击接触时间以及冲击接触区直径。
The signals of the impact stress wave in time domain were transformed into momentary sequential time signals using Hilbert transform. 冲击样本的应力波信号经Hilbert变换变为连续的瞬态时序信号后,提取时间和峰值等特征信息训练BP神经网络。
The turbulence model for dense solid-liquid mixture now is presented. In this model, the stresses for this mixture flow are analysed in detail, including particle impact stress, viscous interactive stress on particles, turbulent stress and Coulombic friction stress. 建立了高浓度固液混合流的湍流模型,分析了混合流的应力(包括颗粒碰撞应力、粘性应力、湍流应力及Coulombic摩擦应力)。
At last, specific material is used to carry out numerical calculations from which a relationship between the impact stress and the position of buckling is obtained. 结合具体材料进行计算,得出了临界屈曲条件,总结出屈曲发生时撞击力和屈曲位置之间的关系以及撞击速度与杆长径比之间的关系。
The test and operation results show that using the needle valve set with a 90 ° sealed conical surface to decrease impact stress can obviously improve the reliability of fuel injection system. 柴油机试验和装车运用结果表明,采用90°密封座面的针阀偶件来降低升程,从而降低冲击应力,可以明显提高燃油喷射系统的可靠性。
Based upon the study on the Down-the-Hole drill J-100, the paper presents a method and some experiences of prolonging the piston life by improving the waveform of the impact stress. 本文根据J&10O潜孔冲击器的研究,介绍了改善冲击应力波形、提高冲击器活塞寿命的方法和经验。
Mechanism of impact stress wave spread in reshaping of Destroyed Casing Well 套损井整形冲击应力波的传播机理研究
So the ACR is an effective modifier for improving impact strength of PVC. Adding 2% anti-impact modifier can strengthen the impact stress of GF/ ABS composite reinforced. 因此所合成的ACR是一种有效的PVC抗冲改性剂。加入2%的抗冲改性剂可以提高玻璃纤维增强ABS复合材料的冲击强度。
Combining with the working circumstances of driving wheel to select the number of wheel teeth of driving wheel rim in accordance with the analysis of simulation result on impact stress, and there are certain guiding significance on the gear train design of walking robot. 根据对冲击应力仿真结果的分析,并结合驱动轮工作环境来选择驱动轮轮缘的轮齿数量。对行走机器人轮系设计有一定的指导意义。
Investigation on impact stress and dynamic load factor on torsion shaft acted by impulsive load 在冲击载荷作用下扭转轴冲击应力和动载系数的研究
For this purpose, experiments on some common rocks with the method of impact stress impulse were made by the authors, and the result of experiments is compared with that of the rock sound wave measurement. 为此,笔者对几种常见的岩石用冲击应力脉冲法进行了试验,并与岩石声波仪测出的结果进行了对比;
A Study on Impact Stress Between Bars Shaped Members of Automatic Weapons 自动武器杆形构件撞击强度的研究
Prolonging the Piston Life of DTH Drill by Improving the Waveform of Impact Stress 改善冲击应力波形提高冲击器活塞的寿命
First, this paper has analyzed the motion and impact stress of needle by using stress wave theory and finite element method, and compared some performance differences between low-inertia injector and general injector; 本文首先分别利用应力波理论和有限元分析方法对喷油器针阀偶件的运动轨迹以及冲击应力进行模拟,并通过分析比较低惯量喷油器和常规喷油器在一些性能方面的差异;
The maximum impact stress is determined by means of stress fringe patters tending to be stable and relevant discussion is made. 又由逐渐趋于稳定的应力条纹图得出梁的最大冲击应力并做了相应的讨论。
It demonstrates that the effect regularities of impact stress pattern characteristic parameters on impact fatigue crack growth rates are related with the mechanism of material deformation and fracture at fatigue crack tip. 结果表明:冲击应力特征参量对冲击疲劳裂纹扩展速率的影响规律与其裂纹尖端的微观变形、断裂机制有关;
The Impact Stress of PHC Piles and Improvement for Impact Property Resistence with Side Restraint PHC桩的冲击应力及利用侧向限制改善桩的抗冲击性能
By theoretical analysing and calculating, we find the short needle valve fuel injector can further decrease the impact stress of the needle valve to the sealed conical surface. 经理论分析和计算发现,短针阀喷油器可以进一步降低针阀对密封座面的冲击应力。
Adding 2% anti-impact modifier can strengthen the impact stress of GF/ ABS composite reinforced. 加入2%的抗冲改性剂可以提高玻璃纤维增强ABS复合材料的冲击强度。
Using ANSYS to Simulate Impact Stress Field of Composite Laminate Plate 用ANSYS进行复合材料层合板的冲击应力场模拟
Because of introducing particle impact stress and Coulombic friction stress, this model is more suitable for the nows with high concentration and large size particle than the others. 由于引入颗粒碰撞应力和Coulombic摩擦应力,本模型较其它模型更适合具有高浓度和大颗粒的流场。
Through the repeat impact test of coating workpieces and comparison between the changes of coating and base thickness under different impact times, it is finded that under impact stress even less than yield limit, material of workpieces appeared macroscopical plastic deformation. 通过对带涂层试样的多冲试验,对不同冲击次数下涂层和基体的厚度变化进行对比,发现即使在低于材料屈服极限的冲击应力下,材料也会产生宏观塑性变形。
The dynamic impact stress vs strain characteristic of St, N. ceramics is tested by use of a Hopkinson pressure bar, and is compared with static compressive stress vs strain characteristic. 利用霍普金森杆加载系统对氮化硅陶瓷的动态冲击应力应变特性作了实验研究,并与氮化硅陶瓷的静态压缩应力应变特性作了比较。
The signals of impact stress wave in time domain are transformed into the analytic ones with the features of momentary sequential time using Hilbert transform. Neural networks are used to extract different characteristics out of signals for automatic identification of impact locations. 利用Hilbert变换在计算原时间序列瞬态属性方面的特性,把冲击应力波的时域信号变为连续的瞬态时序信号,提取与冲击定位相关的特征信息训练人工神经网络,实现冲击位置的自动识别。
The residual compressive stress in the coatings has relationship to the sprayed materials and the particle size. The spraying impact stress plays an important role in the generation of the residual stress. 喷涂生物涂层产生残余压应力,压应力的大小与喷涂材料及材料的粒子尺寸有关。压应力的原因主要是喷射冲击残余应力。
The main study of the paper is paid to test the mechanical properties based on not to undermine the value of components of composite materials, used Non-destructive testing methods are the impact stress wave method and the resonance method. 本文主要研究的是在不破坏构件的使用价值的基础上做到对材料的力学性能进行测试,使用的方法是冲击应力波法和共振法。