portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">本標(biāo)準(zhǔn)規(guī)定了對要安裝在軌道機(jī)車車輛上的設(shè)備進(jìn)行隨機(jī)振動(dòng)和沖擊試驗(yàn)的要求.由于軌道運(yùn)行環(huán)境的影響,車上的設(shè)備將承受振動(dòng)和沖擊.為了保證設(shè)備的質(zhì)量,應(yīng)模擬設(shè)備使用環(huán)境條件對其進(jìn)行一段時(shí)間的試驗(yàn).

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">可采用一系列方法進(jìn)行模擬長壽命試驗(yàn),這些方法都各有優(yōu)缺點(diǎn),常用的方法有:

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">幅值增強(qiáng)法:增強(qiáng)幅值,縮減時(shí)間

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">時(shí)基壓縮法:保留實(shí)際幅值而縮短時(shí)間

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">幅值截取法:去除幅值較小的時(shí)間段

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">本標(biāo)準(zhǔn)主要用于固定式軌道系統(tǒng)上的機(jī)車車輛,也可用于其他場合.

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">1類 車體安裝

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">A級: 車體上(或下部)直接安裝的柜體,組件,設(shè)備和部件;

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">B級:車體上(或下部)直接安裝的箱體內(nèi)部的組件,設(shè)備和部件

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">2類 轉(zhuǎn)向架安裝

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">安裝在軌道機(jī)車車輛轉(zhuǎn)向架上的柜體,組件,設(shè)備和部件

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">3類 車軸安裝

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">安裝在軌道機(jī)車車輛輪對裝置上的組件,設(shè)備和部件或總成.

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">規(guī)范性引用文件

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">GB/T2423.5-1995 電工電子產(chǎn)品環(huán)境試驗(yàn) 第2部分試驗(yàn)方法 試驗(yàn)Ea和導(dǎo)則 沖擊

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">GB/T2423.43-1995電工電子產(chǎn)品環(huán)境試驗(yàn) 第2部分試驗(yàn)方法 元件 設(shè)備和其他產(chǎn)品在沖擊，碰撞，震動(dòng)和穩(wěn)態(tài)加速度等動(dòng)力學(xué)實(shí)驗(yàn)中的安裝要求和導(dǎo)則

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">IEC 環(huán)境試驗(yàn) 第2部分 試驗(yàn)方法 試驗(yàn)Fh振動(dòng) 寬帶隨機(jī)振動(dòng)（數(shù)控）及其指南

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">試驗(yàn)項(xiàng)目的順序如下：

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">首先做增強(qiáng)隨機(jī)振動(dòng)量級的垂向，橫向和縱向模擬長壽命試驗(yàn)，其次作垂向，橫向和縱向沖擊試驗(yàn)；然后作運(yùn)輸和裝卸試驗(yàn)，后作垂向，橫向和縱向功能隨機(jī)試驗(yàn)。