利用AGM求解粘弹性地基刚性梁的非线性控制微分方程（英文）

In the present paper a vibrational differential equation governing on a rigid beam on viscoelastic foundation has been investigated. The nonlinear differential equation governing on this vibrating system is solved by a simple and innovative approach, which has been called Akbari-Ganji’s method(AGM). AGM is a very suitable computational process and is usable for solving various nonlinear differential equations. Moreover, using AGM which solving a set of algebraic equations, complicated nonlinear equations can easily be solved without any mathematical operations.Also, the damping ratio and energy lost per cycle for three cycles have been investigated. Furthermore, comparisons have been made between the obtained results by numerical method(Runk45) and AGM. Results showed the high accuracy of AGM. The results also showed that by increasing the amount of initial amplitude of vibration(A), the value of damping ratio will be increased, and the energy lost per cycle decreases by increasing the number of cycle. It is concluded that AGM is a reliable and precise approach for solving differential equations. On the other hand, it is better to say that AGM is able to solve linear and nonlinear differential equations directly in most of the situations. This means that the final solution can be obtained without any dimensionless procedure.Therefore, AGM can be considered as a significant progress in nonlinear sciences.     

路面强度的非破坏评估

准备充分和及时的养护计划或根据交通量的需求进行公路升级,都需要对现有路面能力及路面可服务性进行评估。使用动态荷载非破坏方法,收集大量的路面结构情况现场信息,方便快捷,能节约成本,数据可信度也很高。     

集成水空中冷器的进气模块

在1个联合开发项目中,Behr公司和Mann+Hummel公司利用风洞装置进行整车试验,对空空中冷方式与进气管集成的水空中冷方式进行了比较。与采用空空中冷方式的量产中冷器相比,集成了水空中冷器的进气模块样件可显著减小进气压力损失,使各排气歧管的温度分布更均匀,还可明显减小压气机与气缸盖之间的增压空气容积。     

基于丰田新全球架构TNGA理念开发的新直列4缸2.0L直喷汽油机

丰田汽车公司开发出1 款新直列4缸2.0 L 直喷汽油机，这是丰田新全球架构(TNGA) 系列发动机中的第二款自然吸气发动机，可以满足顾客对驾驶性、动力性和燃油经济性的期望。     

北美电子控制空气制动

分析了ＡＡＲ现有空气制动系统存在的问题，详细介绍了电子控制空气制动系统的特点，工作原理和优越性，同时提出了推运用计划及推广运用前有待解决的问题。     

作用于车辆轮对上力的测量方法的分析

介绍测量轮对垂直力和侧向力的三种方法，即分别在侧架，车辆辐板及车轮辐条上贴应变计的测量方法，建议完善在车轴上贴应变计的测力方法，分析了该方法的可行性。     

硬质合金滚刀滚齿时机械应力的计算

滚齿时使用硬质合金滚轨，给切削性能的提高提供了可能，在切削加工开始时，刀齿的崩刃妨碍着硬质合金滚刀的成功使用，刀齿刃口的破碎主要因机械过载所造成为了确定切削过程中滚刀刀齿上的机械应力，同时优选滚刀和机加工数据，一种计算机后援计算方法被开发使用，本文讨论这种方法，计算实例表明了刀齿上的应力分布情况，该应力在滚削螺旋齿轮时，有可能引起刀齿的崩刃。