CAN系统在客车空调系统的应用

介绍客车空调电气系统改用CAN系统的思路和硬件设计与软件设计的方法。     

客车底盘检修盖的一种通用型结构设计

为解决客车底盘检修盖沉重、车型间通用性差等问题,设计一种重量轻、结构强度大的通用型客车底盘检修盖.     

土工合成材料光老化试验的研究

在昆明、重庆地区对四种常用的土工合成材料分别进行了自然与人工气候老化试验。以强度保持率为评价指标,选出较合适的紫外光老化数学模型,导出了以紫外光辐射能为变量的两种老化试验之间的相关方程;得出了在我国的西南地区,本文所采用的人工加速老化的加速倍率大约在4.0~14.0之间。     

格拉管线泵站油罐第二次防腐涂漆实践

在格拉管线维持性技术改造中,对全线12座泵站的71座油罐进行了第二次防腐层除锈涂漆施工,积累了一些实践经验.对其施工要点进行了总结:查清旧油罐涂层的破损实情;落实除锈标准;彻底消除油罐渗漏隐患;选择适宜的施工条件;选择适合高原油罐防腐的涂料和适宜的涂刷方法;采取得力有效的安全措施.这些做法确保了高质量按期竣工,实现了安全无事故.这些实践经验,对类似工程有借鉴价值.     

高强钢丝和钢绞线松弛问题探讨

根据多年来对高强钢丝和钢绞线松弛问题的试验研究,结合目前业内人士对松弛问题的关注情况,以实践经验为依据,发表笔者的看法和观点,尤其突出对斜拉索松弛问题的探讨,以期起到借鉴作用。     

Interaction of two three-dimensional explosion bubbles

The interaction of two underwater explosion bubbles was mathematically analyzed in this paper. Based on the assumption of potential flow, high-order curved elements were used to discretize the boundary integral equation and solve it. Assuming that gas inside the bubble follows the isentropic rule, the Euler-Lagrange method was used to trace the evolution of the bubble, and when calculating the singular integral, the singularity of the double-layer singular integral was eliminated by reconstructing a principal-value integral of double-layer potential so that a more precise result could be obtained. Elastic mesh technique (EMT) was also used when tracing the evolution of the bubble interface, and numerical smoothing wasn't needed. A comparison of calculations using this three-dimensional model with results of the Reyleigh-Plesset bubble model shows that the three-dimensional model and calculation method in this paper is practical. This three-dimensional model was applied to simulate the interaction of two bubbles under the action of gravity, and the dynamic characteristics of two bubbles near the surface was also analyzed. Bubbles influenced by surface effects and gravity present severe non-linearity. This paper provides a reference for research into the dynamics of multi-bubbles.     

Research on stability design of a bar-reinforced spherical bulkhead

In this paper, the stability of a concave spherical stem bulkhead under the pumping load when still lying at the slipway is analyzed. The stability of the spherical stem bulkhead with different shell thickness and reinforcing forms is discussed. According to the results of stability analysis, the optimization design of the spherical stem bulkhead stability is performed. On the basis of considering the machining technical requirements of the bulkhead, a rational design of the spherical stem bulkhead structure is obtained. This paper has a certain value to the design of submarine's spherical stem bulkhead.     

汽车电气设备教材对"附加电阻"的讲述有错

本文从点火线圈的初级电路始终处于暂态的工作过程,去看待无附加电阻的点火线圈和有附加电阻的点火线圈的特点,然后将它们进行对比得出结论:①附加电阻是在减小线圈的内阻条件下而设置的,线圈内阻减小后,发动机低转速时,平均电流虽大,但线圈内的发热功率并不大,线圈不会过热。②有了附加电阻,初级电路中多了一个分段点,有条件使发动机起动时将附加电阻短接,蓄电池电压虽下降了很多(可降到9 V),此电压直接加在点火线圈两端,点火线圈仍可供给充裕的点火能量。③附加电阻选用电阻温度系数小的材料,可以保证实现发动机高转速时不断火。     

工匠精神指导下产教融合校企合作的课程体系构建研究

在工匠精神指导下,以戴姆勒铸星教育项目为平台,以校企合作产教融合为育人理念,以双元育人灵活多样的教学方式为原则,校企双方对人才培养方案和课程体系进行实践性构建研究。坚持以生为本,学以致用,以提升教育教学效果和教学质量为最终目标。通过建立人才培养模式的构建和课程体系的优化,推动职业本位工匠精神的塑造,深化产教融合,实现人才培养。     

355/50R22.5宽基低断面全钢载重子午线轮胎的设计

355/50R22.5宽基低断面全钢载重子午线轮胎主要是为打开欧洲市场,后期完成试验论证及市场测试后,将投产于欧洲市场,经济效益可观。355/50R22.5宽基低断面全钢载重子午线轮胎开发设计主要是根据欧标初步设计宽基低断面全钢载重子午线轮胎结构,根据不同的结构设计方案,利用有限元分析轮胎充气轮廓及胎肩、胎圈位置受力情况,通过优选确定最终轮胎轮廓及骨架材料等参数。完成结构设计后,对本项目开发的轮胎进行施工设计。最后对该轮胎进行成品性能试验,主要包括强度性能和耐久性能试验。