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 ( fem ) 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
本文介紹了微動損傷的機理和微動疲勞
壽命的研究方法;利用ug軟體對燕尾榫聯接結構創建了參
數化實體模型;基於ansys軟體平臺求解彈性接觸問題,獲得了榫聯接結構接觸應力及接觸狀態量的分佈;在已有微動疲勞
壽命預測模型的基礎上,引入載荷頻率影響因子,對低周、高低周復合載荷作用下的燕尾榫聯接結構進行了微動疲勞
壽命的預測,與試驗結果對比表明採用本文提出的方法預測榫聯接結構的微動疲勞
壽命是有效的。
It is easy to show, for an exponential decay, that the uncertainty in the life time is also z.
很容易證明,對于指
數衰減來說,
壽命的不確定性也是z。
Most ponds practise polyculture of carps mixed with tilapia or grey mullet. the remaining ponds carry out monoculture of snakehead or catfish. however, many coastal ponds are converted to monoculture of brackish species such as scat, seabream and pampano to reap better profit
大部分魚塘採用混合養殖法,養殖的魚類品種多
數以鯉魚科混合福
壽魚或烏頭,其餘魚塘則採用單養式養殖法,飼養生魚或塘虱。
Empirical distribution function of fatigue life based on harmonic mean
基於調和均值的疲勞
壽命經驗分佈函
數
She had outlived him, lost her husband
她的
壽數比他長。失去了丈夫。
And gideon the son of joash died at a good old age, and he was buried in the tomb of joash his father in ophrah of the abiezrites
32約阿施的兒子基甸,享大
壽數而死,葬在亞比以謝族的俄弗拉,在他父親約阿施的墳墓里。
And which of you by being anxious can add one cubit to his span of life
你們哪一個能用思慮使
壽數多加一刻呢(注:或作「使身量多加一肘呢」 ) ?
His hour is up.
他
壽數已滿。
Thou wilt prolong the king ' s life : and his years as many generations
6你要加添王的
壽數。他的年歲必存到世世。
You will prolong the king ' s life ; his years will be as many generations
詩61 : 6你要加添王的
壽數他的年歲必存到世世。
And which of you by taking thought, can add to his stature by one cubit
27你們中誰能運用思慮,使自己的
壽數增加一肘呢?
After having found out how long they were going to live the son was very sad
兒子知道了父親和自己的
壽數后,非常犯愁。
27 who of you by worrying can add a single hour to his life [ 2 ]
27你們那一個能用思慮使
壽數多加一刻呢(或作:使身量多加一肘呢) ?
And which of you with taking thought can add to his stature one cubit
25你們那一個能用思慮使壽數多加一刻呢? (或作:使身量多加一肘呢) ?