振動試驗臺的選用了解其試驗目的很重要!
選擇振動試驗臺做振(zhen)(zhen)動(dong)(dong)(dong)測試(shi)的(de)目的(de)是(shi)確定機器和設(she)計的(de)部(bu)件的(de)振(zhen)(zhen)動(dong)(dong)(dong),以便在運(yun)輸(shu)過程中(zhong)承受外部(bu)振(zhen)(zhen)動(dong)(dong)(dong)或自生振(zhen)(zhen)動(dong)(dong)(dong)而不(bu)會造成損壞,并發揮其性能(neng)并達到(dao)預定的(de)壽命。越來(lai)越重要的(de)是(shi),這(zhe)里(li)的(de)測試(shi)對象是(shi)指攜帶低壓電器。振(zhen)(zhen)動(dong)(dong)(dong)試(shi)驗的(de)目的(de)主(zhu)要分為:
1)振(zhen)動(dong)試(shi)驗臺環(huan)境(jing)(jing)適應性(xing)測試(shi):通過(guo)選擇(ze)測試(shi)對象將來可能承受的(de)振(zhen)動(dong)環(huan)境(jing)(jing)來激發對象。測試(shi)其(qi)對環(huan)境(jing)(jing)的(de)適應性(xing)。目(mu)前,航空航天中使用的(de)大多數(shu)機載儀器(qi)和(he)設備(bei)必須(xu)經過(guo)振(zhen)動(dong)試(shi)驗,以評估其(qi)性(xing)能是否符合(he)要求;
2)振(zhen)動試(shi)(shi)驗(yan)臺動態強度試(shi)(shi)驗(yan):評(ping)估試(shi)(shi)驗(yan)物體結(jie)構的動態強度,試(shi)(shi)驗(yan)試(shi)(shi)件(jian)在給定試(shi)(shi)驗(yan)條件(jian)下是(shi)否(fou)會產(chan)生疲勞損(sun)傷,此(ci)類試(shi)(shi)驗(yan)的對象主(zhu)要是(shi)結(jie)構件(jian);
3)振動(dong)試驗(yan)臺動(dong)態特性測試:測試物體的(de)動(dong)態特性,如振動(dong)模式,頻率,阻尼等;
4)振(zhen)動試驗(yan)臺其他測試:如振(zhen)動篩選試驗(yan),目的(de)是振(zhen)動生產(chan)線(xian)上的(de)部件,部件和整機,找出工藝中(zhong)的(de)薄弱環節,去除(chu)劣質產(chan)品,提高可靠性。整個產(chan)品。
振(zhen)(zhen)動(dong)測試是模擬產(chan)(chan)品在運(yun)輸,安(an)裝和(he)使用(yong)環(huan)(huan)(huan)境中(zhong)對振(zhen)(zhen)動(dong)環(huan)(huan)(huan)境的影(ying)響。此測試模擬在運(yun)輸,安(an)裝和(he)使用(yong)環(huan)(huan)(huan)境中(zhong)遇(yu)到的產(chan)(chan)品。振(zhen)(zhen)動(dong)環(huan)(huan)(huan)境影(ying)響,決定產(chan)(chan)品是否(fou)能承受各種(zhong)環(huan)(huan)(huan)境振(zhen)(zhen)動(dong)。振(zhen)(zhen)動(dong)測試用(yong)于評估(gu)組件,組件和(he)整個(ge)機器在預期運(yun)輸和(he)使用(yong)環(huan)(huan)(huan)境中(zhong)的阻(zu)力。
振(zhen)(zhen)動(dong)(dong)試(shi)(shi)驗(yan)臺最常(chang)用的振(zhen)(zhen)動(dong)(dong)模式可分(fen)為(wei)(wei)正弦(xian)振(zhen)(zhen)動(dong)(dong)和隨(sui)機(ji)(ji)振(zhen)(zhen)動(dong)(dong)。正弦(xian)振(zhen)(zhen)動(dong)(dong)是一種常(chang)用于(yu)實驗(yan)室的測試(shi)(shi)方法,用于(yu)模擬(ni)旋轉,脈動(dong)(dong),振(zhen)(zhen)蕩(出現(xian)在船舶,飛機(ji)(ji),車輛,航(hang)天器上)和產(chan)(chan)品結(jie)構(gou)共振(zhen)(zhen)頻率(lv)(lv)分(fen)析和共振(zhen)(zhen)點駐留(liu)驗(yan)證所產(chan)(chan)生(sheng)的振(zhen)(zhen)動(dong)(dong)。主要分(fen)為(wei)(wei)掃頻振(zhen)(zhen)動(dong)(dong)和固(gu)定頻率(lv)(lv)振(zhen)(zhen)動(dong)(dong)兩(liang)種。嚴(yan)重(zhong)程度(du)取決(jue)于(yu)頻率(lv)(lv)范圍,幅度(du)值和測試(shi)(shi)持續時間(jian)。隨(sui)機(ji)(ji)振(zhen)(zhen)動(dong)(dong)基于(yu)對(dui)產(chan)(chan)品的整體結(jie)構(gou)抗震強度(du)和包裝狀態下(xia)的運輸環境的評估(gu)。嚴(yan)重(zhong)程度(du)取決(jue)于(yu)頻率(lv)(lv)范圍,GRMS,測試(shi)(shi)持續時間(jian)和軸向。