奔驰车系技术通报

~~奔驰车系技术通报!大连@新之星     

奔驰车系技术通报

通告号码:05-07-83-219通告主旨:空调设定影响车型:奔驰W140底盘(零件号-KLA2108300585)故障现象:车辆行驶过程中EC灯亮起后,空调不工作。故障诊断:读出两个故障码B1235-SmogsensorB31,B1241-Refrigerationlevelsensor。解决方法:以上两个故障码可以通过重新设置暂时取消其功能     

奔驰、路虎车系技术通报

通告号码:05-05-00-211通告主旨:里程数复位影响车型:奔驰说明:除加拿大和美国外,当里程数累计小于250km时,里程数可以复位。操作步骤:ICM-Instrumentclusterwithmaintenanceintervaldisplay→F3Controlunitadaptations→F3Settings→F3Instrumentclustersettings→F3Resettota     

MT2500应用的中英文对照(四)

**发动机不转,点火开关ONCODES-FIXSECOND**没有故障码***列表结束***REVIEWCODES**KEYON,ENGINEOFFCODES-FIXSECOND**NOCODESGATHEREDYET***ENDOFLIST***主菜单-PCM→其他系统故障码数据流(没有故障码)功能测试设置MAINMENU-PCM→OTHRSYSTEMSSERVICECODES DATA(NOCODES)FUNCTIONALTESTSCUSTOMSTUP其他系统=退出现在的主菜单到其他系统的测试警告:现在记忆的VIN将丢失H E L POTHERSYSTEMS=EXITCURRENTMAINMEUNTOIDADIFFERENTSYSTEMSUCHASENGINE…     

Mapped Displacement Discontinuity Method: Numerical Implementation and Analysis for Crack Problems

The displacement discontinuity method (DDM) is a kind of boundary element method aiming at modeling two-dimensional linear elastic crack problems. The singularity around the crack tip prevents the DDM from optimally converging when the basis functions are polynomials of first order or higher. To overcome this issue, enlightened by the mapped finite element method (FEM) proposed in Ref. [13], we present an optimally convergent mapped DDM in this work, called the mapped DDM (MDDM). It is essentially based on approximating a much smoother function obtained by reformulating the problem with an appropriate auxiliary map. Two numerical examples of crack problems are presented in comparison with the conventional DDM. The results show that the proposed method improves the accuracy of the DDM; moreover, it yields an optimal convergence rate for quadratic interpolating polynomials.     

桥梁吊杆断裂原因及预警技术研究

文章结合桥梁吊杆频繁骤断事故,分析了吊杆断裂的主要原因,并针对当前吊杆安全控制技术措施存在的问题,介绍了吊杆安全预警技术及应用效益。     

基于CFD的前置导叶轴流泵通用特性曲线预报

通过求解由RNG k-ε二方程湍流模型封闭的相对定常雷诺时均方程,对初始设计的前置导叶轴流泵进行全三维数值模拟,得到通用特性曲线。分析设计工况点是否在最佳效率处,设计点是否成功。捕捉前置导叶轴流泵内流场,观察导叶预旋是否到位,尾流场是否有旋流。所得的结果对初始设计的前置导叶轴流泵的改进和优化具有十分重要的意义。