资源描述
附录of of a 4, 20107, 998; 9 998to a of A in in at a an of of is of of a of be by of of of in as in of in in at to a 2 000 of at of to to of of a at in a to of A so A of is 9/$一1999 S 1 3 5 0一6307(98) 00041一7A of be of if of is of a of a on to on of of is to be a to of a is on k=1.4 of is is be as of of of 3to is by an on of to be of in be in in in in 18 of it is g(t) as of is as to of an It be to of to is to of of is we as on of (t) by q(t) is of a A is of . , 00,000 m3 =10%, of by , 60,000 m3 ,. of of as of be as of As a of a be by 1.5 .5 of of as is a of of it is to it is to as of a be by a a t) m3 ;一3 5 of a a it is to of of to of of 1to a as 2 is of a of In of ，a -(t), of of or of a ，th is as (t)=Pt . -(t) is et v(t) be of a t. In of a t is a it is of of As of v to on of t) of a on of 4) of of m,. ,., . of 5 % of a 2,719 20 to of to a a of As in in 1 of is to by of of to of in of 一70 5 of in of ). in of 5 of in to to to of to on of of a At it of is of is by of of is be to an to is to in is of a s on an of a in of s in of s. of a of to of in s, in in of up to -2 s an a is of in as in of of a by .6 s, of of so of 3a it is of in of mm In of is of a of at as , of a of of a to a to to 1)6 of an is At to a is a is to to on in of of a of be of is of an 2 of to 1) of 1), (2) of 7), (3) ). of by of . be of to of of of of of is of 24 6. of be of so it is of or if is it is of k a . On be by ,. of a of of to If of a of 23,096 50 of k as of by of is by 3, .in of 4, he of of 920 a 50 of of S 一 l=41 is is by to by to 4, as an of S 一 l=th e d -N 4, o=5106 m=4.5 m=5.5 of it is to as as of to we of 56of we . 7. It is is . an of a is 19, it is of in is .5 , 11.5 , . of of is is in 2. be of to of of of of in 1) of in of 2) of a 3) of 4) of by in a to . An to 2. 3rd 1970.2 . 987;9:119.3 V(i. 1991 (4 D 50of of (1990 (5 6:1041.6 A. 997;26:邮编 620107 ，俄收到1998年4月3日;接受1998年9月29日摘要内在的疲劳曲线应用到龙门式起重机金属材料的疲劳寿命预测问题。起重机，用于在森林工业中，在伐木林场对各种不同的工作条件进行研究，并且做出相应的应变测量。对载重的循环周期进行计算，下雨循环计数技术得到了使用。在一年内这些起重机运作的样本被观察为了得到运作周期的平均数。疲劳失效分析表明，一些元件的故障是自 的，并且不 被一些 的 。1999年 v 科 。 。起重机;疲劳 ;观测龙门式起重机62在运作金属元件疲劳失效。起疲劳故障“起重机的，并且 到年。这种起重机在森林工业的伐木林场被使用，用” 的 木 木到的， 一载30的 。 这种的起重机1000 工作在俄 森林工业的 业中。起重机寿命的问题 的 被 式 到 ，预测 疲劳 ，并 ， 起重机的寿命。 的林场 了一 被在 的林场 62， 这 起重机 应 伐木 ，并且”运木的，这条 。这些 的 是为了这 ” 点在起重机的跨范围 内。一 起重机示 图显示在图1中 。 13509 /元，看到前面的问题。 1999年
展开阅读全文