查询词典 fretting

This concept insect killer machine works autonomously, leaving the user to relax from fretting about their work to be done.

这一概念的昆虫杀手机器厂自主，使用户放松从担心他们的工作要做。

Pd can catalyze the generation of fretting polymers, which results in the rising of resistance.

而且Pd是聚合物生成的催化剂，使得在微动过程中接触电阻升高。

It is discovered that metal protectant and polar polymer can reduce fretting wear of complex lithium grease largely by utilizing Fafnir friction oxidation tester investigates fretting wear of complex lithium grease .

用费夫纳摩擦氧化试验机考察复合锂基润滑脂的微动磨损时，发现金属保护剂和极性聚合物可大幅度降低复合锂基脂的微动磨损。

It is very easy to fall into the habit of doubting, fretting, and wondering if God has forsaken us and if after all our hopes are to end in failure. Let us refuse to be discouraged. Let us refuse to be unhappy.

我们顶容易流入疑惑，怀抱不平，猜想神已经弃绝我们，我们的盼望行将破产…让我们拒绝这一切思想，因为它们的目的是要叫我们失望。

It is very easy to fall into the habit of doubting, fretting, and wondering if God has forsaken us and if after all our hopes are to end in failure.

我们顶容易流入疑惑，怀抱不平，猜想上帝已经弃绝我们，我们的盼望行将破产…。

It is a significantly important for studies of composite fretting to palliate complex fretting damages in actual engineering applications.

复合微动的研究对减缓工程实际中复杂形式的微动损伤具有重要意义。

During the transition from tangential fretting to composite fretting, and to radial fretting, the decreasing of component of tangential fretting was accompanied with the increasing of component of radial fretting.

对复合微动的动力学特性、耗散能变化、损伤形貌、第三体行为、白层的形成和演变规律、裂纹的萌生与扩展，以及磨损与疲劳的竞争关系进行了细致研究。

It illuminated that the TiN coating enhanced the load bearing capacity, and enlarged the using range of substrate material. MoS2 coating and TiN+ MoS2 composite coating both possessed the good capability for palliating radial fretting damage. The microslip increased in radial fretting when the solid lubrication coating was used on the contact interfaces. More system energy can be absorbed in this process in favor of reducing vibration.

TiN 涂层明显提高了基体材料的承载能力，扩大了其应用范围； MoS2涂层和 TiN+ MoS2复合涂层具有较好的抗径向微动损伤能力；固体润滑涂层增加了径向微动界面的微滑，并可吸收更多的系统能量，有利于系统的减振。

They are FF testing methods, surface treatment technique, evaluation of the properties of surface modification layer, coating induced embrittlement, selection of coating materials, effects of SP and other surface modification on fretting fatigue resistance . A new coating technology combined with shot peening is proved in improving FFR of titanium alloy. The relation between fretting wear and fretting fatigue mechanism of titanium alloy are discussed on the basis of the experimental results. The main contributions are as follows:(1) Shot peening is the most efficient way in improving fretting fatigue resistance of titanium alloys. Working hardening, roughening and compressive residual stress are involved in the shot peened surface.

本文针对上述问题，从影响FF行为的关键环节：FF实验方法、表面处理工艺技术及表层性能评价、镀层引起的钛合金脆化行为、脆化机制及镀层材料的选择、喷丸强化因数和表面涂层对钛合金FF抗力的影响、FF与微动磨损的联系等，深入系统地研究影响钛合金FF抗力的控制因数，探讨FF机理，并通过喷丸形变强化与新型表面镀或渗层合理复合，达到进一步提高钛合金FF抗力的目的。

First, the theory of fretting wear and studies on fretting fatigue were introduced and the parametric method was used in the process of creating the model of dovetail joints in UG software. The elastic contact problem is analyzed in finite element method and is used to the parameters' distribution and contact stress of the joint are obtained on the base of ANSYS code. With the effect factor of load frequency, the prediction method of fretting fatigue life of dovetail joint under low and high/low cycle complex load is proposed. The proposed model and the approach were verified by experiments.

本文介绍了微动损伤的机理和微动疲劳寿命的研究方法；利用UG软件对燕尾榫联接结构创建了参数化实体模型；基于ANSYS软件平台求解弹性接触问题，获得了榫联接结构接触应力及接触状态量的分布；在已有微动疲劳寿命预测模型的基础上，引入载荷频率影响因子，对低周、高低周复合载荷作用下的燕尾榫联接结构进行了微动疲劳寿命的预测，与试验结果对比表明采用本文提出的方法预测榫联接结构的微动疲劳寿命是有效的。

No clear conclusions can be made about the predictie alidity of specific measures, they found, except for criteria for the underuse of drugs for cardioascular disease.

除了心血管病不合理用药标准外，对于特定评价方法的预测效度没有明确的结论。

The third and last is that almost all of them, being infinite in number, have been impostures, and by idle and crafty brains merely contrived and feigned after the event past.

第三、即最后一点是：几乎所有这些不胜枚举的预言都是欺人之谈，都是在事件过后由无聊而狡猾的脑筋推测与凭空捏造的。