涡

Furthermore, the non-linear global stiffness matrix is updated in the time domain as the riser deforms.7, Potential relationship between the freely vibration and the forced oscillation has been investigated and a theory model is successfully constructed.

该理论模型可同时考虑到雷诺数和质量阻尼比对横向振幅幅值的影响，同时也再次证明雷诺数是影响涡激振动横向振幅的一个重要参数。

The flow and pressure distribution of mid-part leeside of a slender are dominated by sweep wing and forebody vortices.

细长体中段背风侧的流动和压力分布受到后掠翼与头部背涡的双重控制。

When a fighter aircraft or missile flies at high angle of attack,asymmetric vortexes are produced from the forebody and induce strong side force and yawing moment.

飞机或导弹在大迎角下飞行时会形成非对称涡，从而产生很大的侧滑力和偏航力矩。

When a fighter aircraft or missile flies at high angle of attack, asymmetric vortex es are produced from the forebody and induce strong side force and yawing moment.

飞机或导弹在大迎角下飞行时会形成非对称涡，从而产生很大的侧滑力和偏航力矩。

Slender body is a widely used forebody configuration for modern advanced fighters and tactic missiles.

现代先进战斗机和战木导弹常具有细长前体，大攻角条件下前体背风面会形成非对称涡结构，从而产生很大的侧向力和偏航力矩，这会严重影。。。

Wind tunnel tests had showed that vortices produced by the forebody strake generally improved directional stability, but that certain strake shapes actually reduced stability at high angles of attack when twin tails were used.

风洞测试已显示涡产生的前体边条一般其实改善但那某些边条形状的定向稳定性双尾被使用时，请减少高迎的稳定性。

From these diagnostics, the confluence of cold and warm air, the distribution of air heating due to condensation, the factors affecting frontogenesis are analyzed, and the mechanisms of rainstorm generation are further explored.

通过对视热源和视水汽汇、锋生函数、湿位涡等诊断量的计算和分析，进一步从冷暖空气的交汇路径、水汽凝结加热的分布特征、不同因子对锋生的影响等角度进一步解释了暴雨发生的机理。

The approach of calculating vortex-excited nonlinear vibration by Galerkin's method is proposed.

深水隔水套管的涡激振动是套管的疲劳断裂及可靠性评估的重要部分。

Trapcode Form is a grid-based 3D particle system with a twist. It can be used to create fluid, organic patterns, complex geometric structures and swirling stringy animations.

Trapcode公司发布了基于网格的三维粒子插件FORM，它可以用来制作液体，复杂的有机图案、复杂几何学结构和涡线动画。

In the first part, first, the operational principle of Varivec Propeller is explained. Secondly, the mathematical model for predicting longitudinal and transverse movement hydrodynamic characteristics of Varivec Propeller under steady or unsteady condition are present, based on the general propeller lifting-surface theory, potential flow theory and Green theorem. Thirdly, theoretical calculation methods for predicting hydrodynamic characteristics when the influence of paraboloidal boss on the performance of Varivec Propeller is or isn't considered are present, based on The finite basic solution method, the unsteady vortex lattice method and Hess-Smith method Different rake angle is adopted according to different desire in practical application.

在理论计算部分，本文首先给出了全方向推进器的工作原理，然后基于常规螺旋桨升力面理论、势流理论和格林定理建立了定常和非定常状态下全方向推进器纵向、横向运动的水动力性能计算的数学模型，并利用有限基本解法、非定常涡格法和Hess-smith方法分别对考虑和不考虑桨毂影响时的全方向推进器纵向、横向运动水动力性能进行了数值预报。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐