数值

According to the scheme in chapter 3, experimental investigations are conducted on the single-axis air-bearing test bed. The effects of both rotating speed and air damping on the vibration frequencies of the beam are discussed. The phenomenon of dynamic stiffening is verified by the results of experiment.

最后我们还按照第三章中设计好的实验方案来对非惯性系下的结构动力学问题进行了实验研究，从实验的角度验证了本文一次近似模型在处理这类非惯性系下的结构动力学问题的正确性和有效性，说明了传统零次近似模型对某些高速旋转梁的数值仿真存在严重的偏差。

We do some research on the air gap response of the spar platform by numerical method.

利用数值计算方法对桁架式Spar平台气隙响应的影响因素进行了研究。

Research on water hammer characteristics of air valves Research on water hammer characteristics of air valves has been studied in experiments by establishing mathematical model of the air valve, using suitable method of numerical calculation, and comparing the experimental outcomes with theoretical analysis.

空气阀特性研究试验研究了作为水锤防护装置的空气阀的特性，建立了空气阀数学模型，通过合适的计算方法进行数值计算，并与试验进行了比较。

The air motion in umbrella curtain spray combustion system for diesel engine was studied using numerical analysis with the emphasis on the evolution of in-cylinder flow field, the interactions between swirl and squish and the effects of combustion chamber configuration.

用数值分析方法研究柴油机伞帘喷雾燃烧系统中的空气运动规律，探讨了缸内流场的演变过程、涡流与挤流的相互作用和燃烧室结构的影响，并比较了该燃烧系统与原机燃烧系统中的流场。

Mechanism analysis and numerical simulation of air-breathing model for laser propulsion .

大气呼吸模式激光推进的机理分析及数值模拟。

Many researches have been focused on the simulation of the direct air-cooled condenser of power plant in north China.

在我国北方近期建设的火电厂项目空冷平台的数值模拟中，不少学者对外流场分析已经做了一定的研究。

Based on the numerical simulation results of airdrop landing, the stress of frame was analyzed.

根据数值仿真结果，分析了该特种车车架的受力情况，提出了一些相应的改进措施，从而为车架的实际优化提供了依据。

Airdrop landing process of special vehicles was simulated and studied with LS-DYNA.

在基于LS-DYNA的环境中对某特种车整车的空投着陆进行了数值仿真研究。

Based on the numerical simulation re-sults of airdrop landing, the stress of frame was analyzed. Some defects of design were found and a number ofcorresponding modifications were proposed.

根据数值仿真结果，分析了该特种车车架的受力情况，提出了一些相应的改进措施，从而为车架的实际优化提供了依据。

There are mainly two different types of methods to investigate airflow distribution in cleanrooms, i.e.

试验研究和数值模拟研究是探索洁净室内气流组织规律的两种重要方法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。