骨架式半挂车车架三维实体建模与静态分析

为改进半挂车车架设计,利用Pro/E软件对40英尺骨架式集装箱半挂车车架进行三维实体建模.将三维实体模型进行简化处理和抽中面后导入ANSYS中,再进行模型修补、网格划分,建立半挂车车架有限元模型,然后进行约束和加载,分析其在弯曲工况下车架的静态应力分布情况和强度校核.     

Numerical simulation and optimization design of the EGR cooler in vehicle

The EGR （exhaust gas recirculation） technique can greatly reduce the NOx emission of diesel engines, especially when an EGR cooler is employed. Numerical simulations are applied to study the flow field and temperature distributions inside the EGR cooler. Three different models of EGR cooler are investigated, among which model A is a traditional one, and models B and C are improved by adding a helical baffle in the cooling area. In models B and C the entry directions of cooling water are different, which mostly influences the flow resistance. The results show that the improved structures not only lengthen the flow path of the cooling water, but also enhance the heat exchange rate between the cool and hot media. In conclusion we suggest that the improved structures are more powerful than the traditional one.     

火灾下钢筋混凝土温度场的计算

借助有限元分析软件ANSYS，对火灾作用下钢筋混凝土构件截面温度场进行了计算。计算结果与实验结果吻合良好。证明了该方法的正确性。最后分析了截面尺寸和水泥砂浆保护层对截面外表面温度的影响规律。     

大开间异形柱框架的地震反应谱分析

运用有限元软件ANSYS,对大开间钢筋混凝土异形柱框架进行了动力特性和地震反应谱分析.得到结构的自振频率、振型特点;以及结构在8度抗震设防情况下水平位移沿楼层高度分布曲线、楼层剪力沿楼层高度分布曲线.比较了纯异形柱框架与底层矩形上部异形柱框架的地震反应谱分析结果,表明底层矩形上部异形柱框架能够改善结构底部的抗震性能.     

燃烧火焰法在低碳钢沉积碳材料的观察

低碳钢基体经过240#~1 200#水磨砂纸研磨后,通过火焰法沉积碳材料,观察到组织具有一定缺陷碳纳米纤维沉积,平均长度为1um,长径比5~10,管径大小与研磨后基体上的催化剂颗粒大小相近。     

Finite Element Analysis of Reinforced Concrete Plate Impacted by Block

A new concept of structurally dissipating rock-shed （SDR） was developed by the lab of Tonello IC and LOCIE-ESIGEC （ France）. To decide the dimension of the plate used in SDR, an ANSYS model which could simulate the impact of rock in the centre of the plate was established by Fabien Delhomme. By using this model, some finite element analyses are carried out in the present paper. Firstly, a plate impacted by a block is numerically simulated, the numerical results obtained from different mesh sizes are compared and the accuracy of the finite element model is verified. Then, the dynamic response of the plate impacted at the boundary and in the medium part is computed. By analyzing the stress in rebar, the most dangerous region of impact of plate was found. For a rectangular plate, the most dangerous region is at the corner of the plate when a block drops in. Finally, the whole deformation process of the plate under dropping block was simulated and a simplified definition （ effect zone） to describe the deformation process in different positions of plate was given. From this study, it is found that the impact only affects heavily within the effect zone.     

冲落式坐便器冲水过程三相流动数值仿真

为了数值分析坐便器产品的冲水性能,根据坐便器产品的几何特征、冲水特点及性能评价标准,提出了等效污物的概念。将实际冲水过程气-液-固三相模型简化为气-液1-液2三相流动过程,并利用计算流体动力学(CFD)软件的多相流模型(VOF)实现了冲落式坐便器冲水排污过程的数值仿真。分析了等效污物相的分布状况及其粘度与残余量的关系,进而提出了建立基于等效污物的坐便器冲水性能数值标准方法的初步设想。     

用ANSYS分析钢筋混凝土框架结构

运用有限元分析软件ANSYS对钢筋混凝土多层框架结构进行分析,并与国内通用结构分析软件PKPM分析结果和手算结果进行比较 结果表明,采用ANSYS对钢筋混凝土多层框架结构在竖向荷载作用下的分析满足设计要求     

CFD在“汽轮机原理”课程教学中的应用

提出将CFD引入“汽轮机原理”的教学中,通过CFD强大的图形后处理功能,形象、直观地展示汽轮机通流部分流体参数变化,改善多媒体教学方法。以汽轮机原理的核心内容“级的工作原理”为例,展示了CFD应用于级内流场的讲授过程,以图形结果形象地解释了级内流体的压力、速度、速比及反动度等参数变化规律。CFD的引入能够丰富多媒体教学资源,提高教学效果,激发学生科研兴趣。     

车轮扭矩传感器的结构分析

用ANSYS软件描述了有限元建模及扭矩传感器的分析 ,通常采用力传感器的应变片布片方案 .本文主要工作是建立传感器结构的弹性体的有限元模型 ,分析滚动力矩My 作用于弹性体时的应力和应变分布情况 ,并展示结果