The evolution process of freight car coupler s in our country in the recent 50 years is reviewed.

回顧了我國貨車車鉤50年來的演變過程，分析了其現(xiàn)狀天天日天天干天天天添，并通過與美國貨車車鉤的比較欧美黄片天天在线观看，展望了我國貨車車鉤的發(fā)展趨勢。

From the tower crane or organizations to adopt domestic brand-name three-speed motor, a third gear the pace of work; first-class quality, long-term frequent trouble-free; Change adopted by the electromagnetic brake brakes with the overall design of forming programmes, good mechanical properties, making car operation Flexible comfortable, safe and reliable, significantly prolong its life; Rotary organizations to adopt the form of hydraulic coupler, turning soft, well-targeted, efficient.

塔機起升機構(gòu)采用國內(nèi)名牌三速電機五月丁香花婷婷综合，具有三檔工作速度男女人精品视频站在线观看；品質(zhì)一流，能長期頻繁無故障工作亚洲精品一；變幅機構(gòu)采用帶電磁制動剎車裝置整體設(shè)計成型方案亚洲色图五月天综合，機械性能好，使得小車運行靈活自如网页升级自拍偷拍，安全可靠98在线视频，明顯延長其使用壽命；回轉(zhuǎn)機構(gòu)采用液力偶合形式欧美激情动态图，轉(zhuǎn)動柔和av男人的天堂综合网、定位準(zhǔn)確、工作效率高一级a片操逼逼免费观看视频。

Based on the characteristics of railway vehicles, the crashworthy subway vehicle was designed. The design concept of crashworthy car-body was proposed and the energy-absorbing process of the head car impact was divided into four steps: the first step is the rubber buffer of the buffer equipment of vehicle coupler; the second is the buffer with collapsible tube; the third is the cut bolt of vehicle coupler; the fourth is the special energy-absorbing structures and the anti-climbers on the underframe of head car.

針對地鐵車輛自身特點進行耐沖擊地鐵車輛吸能結(jié)構(gòu)設(shè)計久久精品视频还得看这里，提出了耐沖擊地鐵車輛設(shè)計理念，將該地鐵頭車在撞擊過程中的能量吸收過程設(shè)計為4級：第1級為車鉤緩沖裝置緩沖器，第2級為緩沖裝置中的壓潰變形管三级免费观看网站，第3級為車鉤剪切螺栓，第4級為位于頭車前端底架的吸能結(jié)構(gòu)和防爬器等可變形結(jié)構(gòu)国产美女真人天天爽一级。

With the small test sample to simulate the local stress conditions of the coupler knuckles,the fatigue tests are carried out according to the load spectrums of pulling and pressing programs of the freight car coupler s and their simplified spectrums.

用小試樣模擬鉤舌局部區(qū)域應(yīng)力狀態(tài)二级三级毛片，分別按貨車車鉤拉、壓程序載荷譜和該譜的簡化譜進行疲勞試驗在线观看无码AV直接进入，所得的疲勞壽命值與現(xiàn)場車鉤運用調(diào)查統(tǒng)計值均相符合一级有乳奶水毛片免费；同時，對 AAR所推薦的恒幅載荷也進行了試樣的疲勞試

By compared maximum coupler force and maximum acceleration of car body with common slack coupler at condition of train starting,braking,emergency braking and releasing,we verified that small slack coupler is better than common slack coupler in dynamics performance.This paper also calculated the train dynamics performance parameter with different buffer and braking system,running in different line and using different operating method.

本文利用列車縱向動力學(xué)模擬程序98K免费毛片，計算了齊齊哈爾車輛公司研制的13號小間隙防脫車鉤的縱向動力學(xué)性能操逼公司，通過比較各個車鉤間隙下列車最大縱向車鉤力和列車最大加速度的數(shù)值，得出小間隙車鉤在列車啟動工況无码精品视频在线观看网址、常用制動工況91网国产、緊急制動工況、緩解工況的縱向動力學(xué)性能都較原有車鉤性能優(yōu)異的結(jié)論欧美性交播播。

The core of this design is based on SCM stc89c51, the use of optical coupler to detect the form of car speed and distance, using the movement led display car status and mileage, and the external electromagnetic buzzer to warn has received remote control signal, this paper focuses on the system' s hardware design methods and software design approach.

本設(shè)計的核心是以單片機stc89c51爆乳美女裸体性插视频网站，利用光電耦合器來檢測小車的形式的速度和距離，利用led顯示小車的運動的狀態(tài)和行車?yán)锍膛访佬杂荆⑶彝饧与姶欧澍Q器來警告已接收到遙控信號日韩AV一区二区三区无码另类，本文著重介紹了該系統(tǒng)的硬件設(shè)計方法及軟件設(shè)計的辦法。

The modeling methods about vestibule diaphragm, coupler and draft gear are introduced, too. Among the six Models, Model A and Model B can be used to study the vehicle stability and curve negotiation under different track situations. Model C and Model D can be used to carry out the stability, dynamic curving behavior and ride comfort of the high-speed passenger car. Model E and Model F are three-dimension train dynamic models which consist of three cars (head car, intermediate car and tail car).

所建立的6種動力學(xué)模型中特黄a又粗又硬又爽视频，模型A和模型B可用于研究不同軌道條件下車輛的運動穩(wěn)定性及動態(tài)曲線通過性能农村妇女户外HDXXXX；模型C和模型D可以用來研究車輛的運動穩(wěn)定性、動態(tài)曲線通過性能及運行平穩(wěn)性99这里只有有精品首页；模型E和模型F是列車系統(tǒng)動力學(xué)分析模型免费一看一级毛片视频，都是由三節(jié)車組成的列車單元，三車列車模型作為一個最小的列車單元日韩妓女精品影院在线观看视频网站，包含了頭車欧美A一级黄色网站、中間車和尾車，已能夠反映整個列車的動力學(xué)特性一级性爱视。

According to AAR Manual,calculations are made respectively for the lateral forces applied on vehicles due to deviation of the coupler while the drawing point is in different positions(on the bogie and on the carbody) of the new type speed increased 90 t depressed center flat car ,so that basis is provided for determination of the overall scheme.

按照《AAR機務(wù)標(biāo)準(zhǔn)手冊》av网站一级在线，對新型提速90 t凹底平車的牽引點布置在不同位置(布置在轉(zhuǎn)向架上和布置在車體上)時由于車鉤的偏移而作用在車輛上的橫向力分別進行了計算，為確定總體方案提供了依據(jù)欧美的性爱。