查询词典 sound velocity

At the circumstance of low speed of flow, the standing wave resonances of protruding and trap cylindrical cavities are also studied. The distribution of sound particle velocity and pressure of the standing wave in cavity are analysed.

还进行了陷落式和突出式两种圆柱形腔驻波共振的研究，分析了驻波共振的声场分布，其频率公式与实验值符合很好。

It shows that the particle vibration velocity is related to the maximum single sound charge,distance from the blasting point uo the measured point,types of explosive and blocking condition.While transforming opencast mining into underground mining,if a goave is filled up with gangues,the surface rock mass of slope ca...

在露天转地下开采时，如果对采空区充填废石，不仅可以使边坡表面岩体处于有利的三向受力状态，回填废石体还起到了爆破减震作用，同时还有明显的高频滤波作用，有利于保持地下巷道的稳定性。

So the paper thinks of aircraft sound source as motorial dot source to research the acoustic field around airport, and analyses the impact of the aircraft velocity against the acoustic field around airport stressfully.

论文首先将飞机声源作为运动点源，考查对机场周围声场的影响，并重点分析飞行速度对机场周围声场的影响。

Applications Construction of industrial commercial or residential air handling operations Suitable for operating temperatures up to 120°C with maximum air velocity of 10 m/s and static pressure of 50 mm water gauge Benefits Non-combustible (Tested to SABS 0177 Part V) Class I fire index (Tested to SABS 0177 Part III) Integrated system Reduces manufacturing, material and insulation costsroduct can be tailor-made to suit the application Can be used in conjunction with metal and flexible ductwork Modifications can be fabricated on site Can be pre-grooved or grooved on site Low thermal conductivity Non corrosive Excellent sound reduction Controls condensation

应用 工业商业或住宅建筑空气处理操作适用于工作温度与10米，最高风速可达120℃/ s和50毫米水表静压优点不可燃（经测试可SABS规格0177第五部分） I类火灾指数（经测试可SABS规格0177第三部分）集成系统降低制造，材料和绝缘costsroduct可以度身订造，以满足特定的应用可用于金属管道和灵活的结合修改可以在现场制造可以预先槽槽或网站导热系数低非腐蚀性出色的声音还原控制凝结

It is also insightful to examine how the sound pressure level varies with jet velocity as the function of frequency.

研究声压水平作为频率的函数如何随射流速度变化也是很有见识的

The vibration velocity and sound radiation power curves of submerged cylindrical shell, has strong resonant characteristics. It can be described by resonance radiation formulas, which include superposition of inherence vibration modes, by using resonance radiation theory .

本文为验证共振辐射理论，对无限长和有限长圆柱壳体，首先计算了复共振频率并分析其固有振动特性，然后结合共振辐射理论讨论壳体振动和声辐射中各振动模式的贡献及其作用特性。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。