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Aimed at the crankshaft fatigue of certain typed 4 cylindered internal combustion engine this paper established the dynamics model of piston-shaft system and carried out simulation.A...

文中针对某型号4缸内燃机曲轴疲劳，建立了活塞-轴系动力学模型并进行仿真，然后把仿真结果转化为时间载荷传递到曲轴的有限元计算模型中，最后对该有限元模型进行疲劳仿真，从而获得整个曲轴的疲劳寿命计算结果。

According to the d'alembert principle, the piston moving characteristics must be identified firstly to analyze its reciprocating inertia force.

根据达朗伯原理，为分析作用在活塞上的往复惯性力，需要先确定活塞的运动特性。

The paper presents a linear transient solution for the solitary wave generated by a piston-type paddle in a finite flume based on the boundary condition derived by Dean and Dalrymple (1991). The wavemaker problem is simplified by decomposing the wave potential into two parts. One is the evanescent wave and the other is progressive wave. The possible solution for the evanescent wave is expressed in form of the Fourier series.

本文根据Dean与Dalrymple（1991）描述造波水槽内部之线性边界条件，将水槽内部之流速势分为振荡波与前进波以简化问题，再以Fourier级数展开，可将问题化为二非齐次常微分方程式，在给定造波初始条件的情况下即可解析有限长度造波水槽自静止开始造波一段时间后停止之线性暂态解。

Unlike the construction of traditional diaphragm piston pumps, each of the pump heads is provided with a special FELUWA pulsation dampener.

与传统的隔膜活塞泵的结构不同的是，每一个泵头都装有一个特殊的 FELUWA 脉冲缓冲

For the large damping factor, the displacement of free piston increases with the frequency, and there is no resonance vibration appeared.

由于系统的相对阻尼系数比较大，自由活塞的位移随着频率的增加而增加，没有出现共振现象。

The change of damping force with stimulation current and the piston velocity was calculated by means of the Bingham model.

采用宾汉模型计算了阻尼力随激励电流、活塞运动速度的变化。

This modification includes the piston deactivation, fuel pump reformation, as well as intake and exhaust system rebuilding.

其中的工作包括对活塞、喷油泵和进、排气系统等的改造。

This spark must occur near the end of the compression stroke,as the piston approaches top dead center.

这火花必须发生在压缩冲程附近的末端，因为活塞接近中心。

Turn the piston to the top dead center.

将活塞转到上止点。

The main reason why this 2.4-stroker engine is such a perfect combination is the stroke of the K24 crankshaft in conjunction with the H22a's connecting rod center to center length and dead-on piston height matches perfectly with the F20C's deck height, Castillo said.

主要原因是这2.4loken引擎是如此的完美结合，是中风的k24曲轴一起h22a的连杆中心距长度和死对活塞比赛高度完美配合该f20c的甲板高度，卡斯蒂略说。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。