瞬时变化 meaning in English
transient variation
Examples
- Using numerical simulation method , detailed dynamic pressure variations , transient gas temperature and mass flow rate in the ptr , and the coefficient of performance of ptr and the exergy losses of all parts of ptr were obtained
用数值模拟方法得到了制冷机内部各点的压力、温度、质量流率等参数的瞬时变化情况及整机的制冷系数，并得到了制冷机各部件的（火用）损失及整机的（火用）效率。 - When the change of radiation environment has instantaneous change , the photosynthetic rate ca n ' t reach the rate that it should be in the changed situation . that is called the photoperiodic induction . usually the time of the photoperiodic induction is from 3 minute to 8 minute
当叶片所处光环境的光强和光质发生瞬时变化后叶片光合速率通常都要经过3 8分钟适应才能达到变化条件下应有的光合速率值。 - Solution of nonlinear wave loads in regular oblique seas . based on strip method , thinking about nonlinear factors such as no straight shipboard on waterline , the instantaneous variation of wet surface shape and slamming effect of ship bottom , the numerical methods of nonlinear fluid force in large amplitude oblique regular seas are discussed
关于斜浪规则波中非线性波浪载荷的计算:本文基于切片理论，考虑到船体非直舷、水下剖面形状的瞬时变化以及砰击等非线性因素，讨论了大波幅斜浪规则波中非线性流体力的时域计算方法。 - The calculated drafts covers the whole possible ship draft in the large amplitude motion ; secondly , the research creates and solves the ship large amplitude motion equations . on the one hand , the actual calculation takes into account the coupling between the different motion modes , on the other hand , in the process of calculation of the ship hydrodynamic coefficient , it considers the influence of the nonlinear factor . the hydrodynamic coefficient used in the calculation of froude - krylov force , diffraction force and radiation force changes instantaneously following the draft , and the hydrostatic buoyancy is computed very accurately for the instantaneous immerse hull
本文的研究分为二个部分：首先利用frank源汇法计算水动力系数，计算包括不同吃水时的附加质量和阻尼系数，吃水范围涵盖了船舶大幅度运动时所有可能的吃水；然后建立和求解船舶大幅度运动方程，在实际计算时一方面考虑了运动模态之间的耦合，另一方面在计算水动力时，考虑了非线性因素的影响。 froude - krylov力、辐射力、绕射力中的水动力系数随吃水瞬时变化，静浮力的计算精确到船体瞬时湿表面积，最后用四阶龙格?库塔方法在时域内求解船舶运动方程，并进行了载荷计算。