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相当质量
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  nominal mass
     Taking impact as an example this paper has analysed nominal mass of deter- minate beams by the energy method.
     本文以冲击问题为例,用能量法对基本静定梁的相当质量作了分析。
短句来源
  equivalent mass
     The conception of equivalent mass is introduced in the calculation of flight time and its physical meaning and mathematical implication are explained.
     在飞行时间的计算中,引入了相当质量的概念,并说明了它的物理和数学的含义。
短句来源
     In the text we analyse the changes of the momenta and the energy on each stage in the impact process, take into account the effect of the mass of impact object and the system of the closed cylindrical shell by impact, and transform the distributed mass of the whole cylindrical shell into an only concentrated "equivalent mass by the method of reduced mass. Consequently we derive the dynamic factor of the closed cylindrical shell due to impact load.
     文中分析冲击过程各阶段的动量及能量的变化,并计入冲击物和被冲击的闭合圆柱壳系统质量的影响; 用相当质量法将整个圆柱形壳体的分布质量转化为只有一个集中的“相当质量”,从而导出闭合圆柱形壳体在冲击力作用下的动力因数.
短句来源
     The ratios of the impulse transformed to and the energy absorbed by the frame in the initial collision to that carried by the moving body before impact is only related to the ratio between the 'equivalent mass' of the frame paticipating in the initial collision and the mass of the impacting body, having nothing to do with the impacting velocity to a certain extent.
     刚架在初始撞击中吸收的能量和冲量与初始动能和动量之比,仅与刚架承受初始撞击的相当质量和冲击物质量之比有关,而与冲击速度无关,文中给出了二者的关系式。
短句来源
     In this paper the author presents two simplified methods of calculating natural frequency for multi-degree-of-freedom systems, one of which is equivalent stiffness and equivalent mass method, the other of which is dynamic displacement method. Both of the methods could be applied to structural design.
     作者提出多自由度体系自振频率数值计算的两种简便方法——相当刚度相当质量法和强迫力法,可供结构设计参考应用。
短句来源
     In this paper the author presents two simplified methods of calculating natural frequency for multi-degree-of-freedom systems, one of which is equivalent stiffness a n d equivalent mass method, the other of which is dynamic displacement method. Both of the methods could be applied to structural design.
     作者提出多自由度体系自振频率数值计算的两种简便方法──相当刚度相当质量法和强迫力法,可供结构设计参考应用。
短句来源
  “相当质量”译为未确定词的双语例句
     A simple method for calculating the natural period of multistory frame structures
     多层框架结构自振周期一种简便计算方法——相当刚度相当质量
短句来源
     Nominal Mass of Determinate Beams
     静定梁的相当质量
短句来源
     The numerical calculations show that a metal hydride pump system with comparable size as water sublimator and less mass loss can satisfy the cooling requirement of the astronaut during EVA process,and the temperature can be regulated by controlling the pressure of the hydride bed.
     研究结果表明 ,金属氢化物热泵能够满足宇航员出舱活动中的散热要求 ,其体积与水升华器相当 ,质量损失小 ,并且能够通过控制反应床的压力调节出口水温 ,可控性良好。
短句来源
     It is the core and essential assurance to enhance company’s competition that strengthend process control and optimize cost structure, espe- cially decrease trouble cost ,and it is also developing tendency.
     在保持产品相当质量水平的基础上,不断强化过程控制,优化成本结构,特别是降低故障成本,是企业提升竞争力的核心和根本保证,也是企业未来发展的必然趋势。
短句来源
     Calculation samples and error analysis show that the new procedure can turn out reliable calculation results with the calculation accuracy meeting the general engineering requirements,indicating that the method is applicable for calculation of natural frequency and vibration period of multistory frame systems.
     算例和误差分析表明:相当刚度相当质量法所得的计算结果可靠,计算精度完全可以满足一般的工程需要,且方法简单明了,与其它常用近似计算方法比较可节省大量计算工作量。
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  nominal mass
The high resolution capability of the first two analysers enables separation of parent ions with similar nominal mass but different elemental composition.
      
Improved magnet technology offers high speed quadrupole style survey scans covering the full elemental mass range at nominal mass resolution.
      
This is caused by CP congeners with the same nominal mass, but with five carbon atoms more and two chlorine atoms less; for example C11H1737Cl35Cl6
      
When the nominal mass ratio of TEOS/PDMS was less than 1.5, the ORMOSILS began to show the rubber-like elasticity.
      
Moreover, the grade 3 and class 3 reference weights can be tested against the weights incorporated in the balance by taking their nominal mass values.
      
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  equivalent mass
Spectrographic detection resulted in background equivalent mass values below 10 ng for 22 from 36 elements applied in solution (Ar + CCl4 atmosphere and NaCl matrix).
      
Supersonic microjet nozzles thus provide a more effective small-scale high-pressure gas delivery device than do sonic nozzles of comparable scale at equivalent mass flow rates.
      
One subject was loaded during bipedal gaits with a bicycle-equivalent mass, to simulate to cross-country cycling situation.
      
Maximum mechanical energy release is by far greatest for gas eruptions (≤~1.3 MJ/kg of fluid-rock mixture)-about one-half that of an equivalent mass of gunpowder and one-fourth that of TNT.
      
The objective of the suspension design is to decrease the equivalent mass with increasing first torsional frequency.
      
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This paper gives a theoretical analysis about the hit energy, flight time, delay time etc. of the electromagnetic parts of a line printer. The methods for measuring flight time and delay time under laboratory conditions are described and a comparison between measured and calculated values is made.The conception of equivalent mass is introduced in the calculation of flight time and its physical meaning and mathematical implication are explained.

本文从理论上对行式打印机电磁铁部件的击打能量、飞行时间和滞后时间等问题,进行了分析计算;提出在实验室条件下测量飞行时间和滞后时间的方法;对它们的实测值和计算值作了比较。 在飞行时间的计算中,引入了相当质量的概念,并说明了它的物理和数学的含义。

The present paper treated some of the problems for dynamic computation of closed cylindrical shell due to an axial impact load, including the calculations of the dynamic stresses and the problems of stability. It analysed the changes of the momentums and the energy in the impact process, took into account the effect of the mass of the striking object and the system of the closed cylindrical shell to be struck, turned the distributed mass of the total cylindrical shell into an "equivalent mass" being concentrated...

The present paper treated some of the problems for dynamic computation of closed cylindrical shell due to an axial impact load, including the calculations of the dynamic stresses and the problems of stability. It analysed the changes of the momentums and the energy in the impact process, took into account the effect of the mass of the striking object and the system of the closed cylindrical shell to be struck, turned the distributed mass of the total cylindrical shell into an "equivalent mass" being concentrated on only at one end of the shell by using the way of reduced mass, and accordingly derived the dynamic factor of the closed cylindrical shell under the axial impact load, hence resolved the questions of calculation of the dynamic stresses in the loaded case mentioned above and found out the critical loading.

本文讨论了闭合圆柱形壳体在轴向冲击荷载作用下的某些动力计算问题,其中包括动应力的计算和稳定性问题.文中分析了冲击过程中动量及能量的变化,并计入冲击物和被冲击的闭合圆柱壳系统质量的影响;用相当质量法将整个圆柱形壳体的分布质量转化为只集中在壳体一端的“相当质量”,从而导出闭合圆柱形壳体在轴向冲击荷载作用下的动力因数,因而解决了在上述受力情况下计算动应力的问题和求出临界荷重的问题.

This article discusses the dynamic computation of the closed cylindrical shell under impact load. In the text we analyse the changes of the momenta and the energy on each stage in the impact process, take into account the effect of the mass of impact object and the system of the closed cylindrical shell by impact, and transform the distributed mass of the whole cylindrical shell into an only concentrated "equivalent mass by the method of reduced mass. Consequently we derive the dynamic factor of the closed cylindrical...

This article discusses the dynamic computation of the closed cylindrical shell under impact load. In the text we analyse the changes of the momenta and the energy on each stage in the impact process, take into account the effect of the mass of impact object and the system of the closed cylindrical shell by impact, and transform the distributed mass of the whole cylindrical shell into an only concentrated "equivalent mass by the method of reduced mass. Consequently we derive the dynamic factor of the closed cylindrical shell due to impact load.

本文讨论闭合圆柱形壳体在冲击荷载作用下的动力计算.文中分析冲击过程各阶段的动量及能量的变化,并计入冲击物和被冲击的闭合圆柱壳系统质量的影响;用相当质量法将整个圆柱形壳体的分布质量转化为只有一个集中的“相当质量”,从而导出闭合圆柱形壳体在冲击力作用下的动力因数.本文的特点是具有实用价值,计算比较简便。

 
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