The equivalent viscous damping ratio and the equivalent natural frequency are obtained by comparing the system with a purely linear, spring-mass-damper system of single freedom.
通过和单自由度线性弹簧-质量-阻尼系统进行比较，得到该带裂缝梁结构的等效自然频率和等效粘滞阻尼比。
Contrast and analyze single lumped mass and two lumped mass, conclude main factors which affect valve system.
对比分析了单质量模型和二质量模型，归纳了影响配气系统的主要因素。
The effects of the propulsion system on the dry mass of the single stage to orbit vehicle are analyzed, the propulsion system being made up of these engines.
当单级入轨运载器主推进系统由这些发动机组成时，计算和分析了推进系统的组成方式对运载器干质量的影响。
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