the influences of the traction motor suspension stiffness and pitching moment of inertia on the accelerations at all directions and the dynamic performances of locomotive are analyzed.

发现优化电机吊挂刚度可以改善其工作条件，特别是明显地减小电机垂向加速度，但机车整车性能几乎无变化。

a numerical method is given to calculate the unsteady lift, pitching moment and drag acting on an airfoil of rotors under attached-flow conditions in a compressible flow.

基于附着流状态下的旋翼非定常翼型气动模型，给出了计算该状态下的翼型非定常升力、阻力和俯仰力矩的数值计算方法。

based on slender body theory, an engineering method for estimating the heaving force and pitching moment and the vortex interference effects on the submarine is described.

基于细长体理论，提出了一种预测该升沉力和俯仰力矩及其涡干扰的工程方法。

starting with airfoil 2, the pitching moment is increased from -. 15 to -. 25 to provide more aft loading and aft camber.

从翼型2俯仰时刻由原来的15年至今25年至今，以提供更多后部后部拱落。

the investigation illustrated that the aerodynamic lift and pitching moment of wing can be predicted accurately by cfd based on rans approach with comparison to model tests.

结果表明与模型试验数据相比，基于rans方程的cfd方法能够準确预报机翼的气动升力和力矩。

the aerodynamic coefficients such as the normal force, axial force, and the pitching moment of the ve-hide computed by the local method are in good agreement with the experimental data.

由此计算出飞行器的法向力、轴向力和俯仰力矩系数，计算结果与实验数据相符。

the calculation has provided that in the nonuniform flow field the curve of pitching moment may be distorted.

计算证明在非均匀流场中俯仰力矩曲线可能发生畸变。