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金(jin)屬(shu)軟(ruan)管(guan)(guan)(guan)主要由(you)(you)柔性(xing)(xing)(xing)體（波(bo)紋(wen)管(guan)(guan)(guan)）、網體和(he)各(ge)類不同形(xing)(xing)(xing)式的(de)接(jie)頭(tou)(tou)組成。金(jin)屬(shu)軟(ruan)管(guan)(guan)(guan)的(de)內管(guan)(guan)(guan)是螺旋形(xing)(xing)(xing)或(huo)環形(xing)(xing)(xing)薄(bo)壁不銹(xiu)(xiu)鋼波(bo)紋(wen)管(guan)(guan)(guan),其(qi)外層網套由(you)(you)不銹(xiu)(xiu)鋼絲或(huo)鋼帶按一定(ding)的(de)參(can)數編織而成。金(jin)屬(shu)軟(ruan)管(guan)(guan)(guan)兩(liang)端(duan)接(jie)頭(tou)(tou)或(huo)法(fa)(fa)蘭(lan)是根(gen)據用(yong)戶(hu)管(guan)(guan)(guan)道(dao)的(de)接(jie)頭(tou)(tou)或(huo)法(fa)(fa)蘭(lan)相配的(de)。金(jin)屬(shu)軟(ruan)管(guan)(guan)(guan)的(de)波(bo)紋(wen)管(guan)(guan)(guan)是由(you)(you)極薄(bo)的(de)無(wu)縫或(huo)縱焊(han)縫不銹(xiu)(xiu)鋼薄(bo)壁管(guan)(guan)(guan)經高精度(du)塑性(xing)(xing)(xing)變型加(jia)工形(xing)(xing)(xing)成，波(bo)紋(wen)管(guan)(guan)(guan)輪(lun)廓的(de)彈性(xing)(xing)(xing)特性(xing)(xing)(xing)決定(ding)了軟(ruan)管(guan)(guan)(guan)的(de)柔性(xing)(xing)(xing)和(he)抗(kang)疲(pi)勞性(xing)(xing)(xing),金(jin)屬(shu)軟(ruan)管(guan)(guan)(guan)易吸收各(ge)種運動(dong)(dong)變形(xing)(xing)(xing)和(he)循環載荷,尤其(qi)能夠滿(man)足系統(tong)需較大位移(yi)的(de)補(bu)償,對管(guan)(guan)(guan)道(dao)系統(tong)的(de)運動(dong)(dong) , 熱膨脹(zhang)吸收、振動(dong)(dong)吸收起著重要作用(yong)。 

彈(dan)性元件下作時有兩種(zhong)狀態金屬(shu)軟管(guan)；一種(zhong)是(shi)在(zai)一定的載荷和位移情況下工作，并保持載荷、位移始終(zhong)不變或(huo)很少變化，

        稱為靜態工(gong)(gong)作；另(ling)一種使用情(qing)況是載荷和位移不(bu)斷(duan)周期往(wang)復交替(ti)變化．元件處于循環工(gong)(gong)作狀態。由于工(gong)(gong)作狀態的不(bu)同，元件損壞

        或失效(xiao)的模式也不同。儀表(biao)彈(dan)(dan)性敏感元(yuan)件工作在彈(dan)(dan)性范(fan)圍內，基本上處于靜態(tai)工作狀態(tai)，使(shi)用壽命很長，高壓膠管(guan)一般達到數萬

        次(ci)到數十萬次(ci)。工程中(zhong)應(ying)(ying)用(yong)的波紋管類(lei)組件，有時工作在彈塑性范圍(wei)或(huo)交變(bian)應(ying)(ying)力狀態，壽(shou)命只有成(cheng)百上干(gan)次(ci)。元(yuan)件在循環工作時

        必須(xu)給定(ding)許用工(gong)作壽命，規(gui)定(ding)循(xun)環次數、時間和頻率。

　　  彈性元件(jian)的額定(ding)壽命是元件(jian)設計時定(ding)出的預(yu)期使(shi)用(yong)壽命，要求(qiu)在(zai)這段期間(jian)內元件(jian)不允許出現疲勞、損壞或失效等現象。