portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">本標準規定了對要安裝在軌道機車(chē)車(chē)輛上的設備進(jìn)行隨機振動(dòng)和沖擊試驗的要求.由于軌道運行環(huán)境的影響,車(chē)上的設備將承受振動(dòng)和沖擊.為了保證設備的質(zhì)量,應模擬設備使用環(huán)境條件對其進(jìn)行一段時(shí)間的試驗.

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(cháng)壽命試驗,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;">幅值增強法:增強幅值,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;">本標準主要用于固定式軌道系統上的機車(chē)車(chē)輛,也可用于其他場(chǎng)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(lèi) 車(chē)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(chē)體上(或下部)直接安裝的柜體,組件,設備和部件;

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(chē)體上(或下部)直接安裝的箱體內部的組件,設備和部件

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(lèi) 轉向架安裝

portant; margin-bottom: 20px !important; width: auto !important; line-height: 2em !important;">portant; margin-right: 0px !important; margin-left: 0px !important; width: auto !important;">安裝在軌道機車(chē)車(chē)輛轉向架上的柜體,組件,設備和部件

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(lèi) 車(chē)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;">安裝在軌道機車(chē)車(chē)輛輪對裝置上的組件,設備和部件或總成.

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 第2部分試驗方法 試驗Ea和導則 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 第2部分試驗方法 元件 設備和其他產(chǎn)品在沖擊，碰撞，震動(dòng)和穩態(tài)加速度等動(dòng)力學(xué)實(shí)驗中的安裝要求和導則

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 第2部分 試驗方法 試驗Fh振動(dòng) 寬帶隨機振動(dòng)（數控）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;">試驗項目的順序如下：

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