查询词典 fatigue

The effect of RE and heat treatment on impact fatigue property of medium chromium cast semi steel was studied in this paper by means of impact fatigue testing machine.

研究了稀土元素及热处理对中铬半钢冲击疲劳性能的影响。

The rubber seal issue under operating system has been studied by the theory of dynamic sealing. The deformation and stress distribution of rubber material were calculated under the well in-pressure and sealing out-pressure using then-linear finite element. Through the experimental study of the rubber strength and fatigue, the intensity limit and the fatigue life were obtained. According to the study results, a new type of sealing equipment was designed by adding the reinforcing steel bar into rubber core to reduce the maximum shear stress, so as to solve the problems of dynamic seal under hyperbaric pressure.

采用动态密封理论，针对带压作业系统中的橡胶密封胶芯问题，利用非线性有限元计算了在井压和密封外压作用下的变形和应力分布特征，并通过对密封胶芯材料进行了强度和疲劳实验研究，获得了胶芯材料破坏的原因，进而根据计算和实验研究结果，进一步提出了在胶芯内增加钢筋以减小最大剪切力的改进意见，同时进行了理论校核，并以此为基础设计了新型的密封胶芯，从而解决了带压作业装置高压动密封的难题。

In order to improve the life of cement concrete bridge deck pavement,compound beam test was used to research the fatigue characteristics of hot mixed asphalt courses on bridge deck,finite element analysis method was employed to make the mechanical response of compound beam accord with that of actual bridge deck under the same load,the fatigue test was done for compound beams with different pavement structures.

为了提高水泥混凝土桥面沥青混凝土铺装的使用寿命，以复合梁试验评价不同的桥面沥青铺装结构的疲劳性能，采用有限元法分析荷载作用下复合梁试件具有与实际梁体一致的应力响应，并采用复合梁疲劳试验测试不同桥面沥青铺装层组合的疲劳寿命。

Based on the analysis of the main failures discovered in pavement on steel deck plate and the demanding service condition of the pavement on steel deck,high-temperature rutting test,low-temperature bending test and controlled stress flexural fatigue test are used to study the performance of asphalt mixtures modified by epoxy resin including high-temperature stability,low-temperature cracking-resistance,and fatigue cracking-resistance,which are served to evaluate the modification effect of epoxy resin of different contents.

文摘：在分析钢桥面铺装层主要病害和特殊工作环境的前提下，分别采用高温车辙试验、低温小梁弯曲试验和控制应力小梁弯拉疲劳试验，研究了不同环氧树脂掺量下的环氧树脂改性沥青混合料的高温稳定性、低温抗裂性和抗疲劳性能。

Based on the analysis of the main failures discovered in pavement on steel deck plate and the demanding service condition of the pavement on steel deck,high-temperature rutting test,low-temperature bending test and controlled stress flexural fatigue test are used to study the performance of asphalt mixtures modified by epoxy resin including high-temperature stability,low-temperature cracking-resistance,and fatigue cracking-resistance,which are served to evaluate the modification effect of epoxy resin of different contents.

在分析钢桥面铺装层主要病害和特殊工作环境的前提下，分别采用高温车辙试验、低温小梁弯曲试验和控制应力小梁弯拉疲劳试验，研究了不同环氧树脂掺量下的环氧树脂改性沥青混合料的高温稳定性、低温抗裂性和抗疲劳性能。

The damage analysis of cracked turbine disk in the rocket engine is described. From a series of analyses, the causes of failure were reasoned through calculation and experiments, fatigue analyses which include stimulating vibration test and fatigue strength calculation were emphasized.

针对某火箭发动机涡轮盘在热试车中出现的裂纹故障，进行全面的分析，准确定位故障类型，以试验和计算分析给出合理的故障原因，重点是在疲劳分析方面所做的工作，包括振动模拟试验、疲劳强度计算，并根据疲劳强度分析结果提出改进方案。

A factor of friction power is considered during fatigue, and a new model for predicting fretting fatigue life under low cycle load is presented based on a nominal stress method. For dovetail joint, the problem of elastic contact is solved using the finite element method.

在低周疲劳寿命预测方法中，通过引人摩擦功因子，考虑微动作用对构件疲劳寿命的影响，对传统的名义应力法进行改进，以用于构件的低周疲劳寿命预测。

Fretting fatigue ; life prediction ; low cycle fatigue ; dovetail joint ; nominal stress method

微动疲劳；寿命预测；低周疲劳；燕尾榫；名义应力法

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。

We study the profile alloy fatigue endurance limit for product design fatigue performance indicators.

研究铝合金型材的疲劳持久极限，为产品设计提供疲劳性能指标。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。