文中提出了实验模型的零阻尼设计原则，描述了失速颤振发生的过程。
Designing of BF-1 rotors depends upon the principle that the total damping is equal to zero at the point near the stall flutter boundary.
看来采用自由无阻尼正规模态可保证变形运动的线动量和角动量为零。
The use of the free undamped normal modes is seen to ensure that the linear and angular momenta of the distortional motion vanish.
对于不同的传压管径、传压管长度和腔室容积，得到不同阻尼的衰减振荡曲线以及过阻尼时呈单调衰减的回零过程曲线。
Then the different damped oscillation curves and over-damped monotonic decay curves can be obtained for various diameter and length of the pressured tube and various volume of the chamber.
通过引入非线性阻尼项，保证了闭环系统的所有信号都是全局稳定的，而且跟踪误差及参数估计误差均收敛于零。
By introducing nonlinear damping term, it is proved that all signals in the closed-loop system are globally stable, and the tracking error and the parameter (estimation) error converge to zero.
证明了箭机对负阻尼零点网络的可实现性，以及测试的重复性和稳定性。
The realization of the negative damp zero network in the onboard computer, and the repeatability and stability were verified in the test.
系统振动方程的自由度多达几百，阻尼阵不为零，因此刚度阵的奇异使方程的求解更加困难。
Because the stiffness and damp matrices are spare and unbalance, especially the stiffness matrix is singular, the solution for the vibration equation becomes very difficult to be obtained.
结果表明：在不考虑激光线宽及消相碰撞时，探测场的吸收随时间在零吸收附近作类似于阻尼减幅振荡，系统可实现无反转放大；
It is shown that the time-dependent probe absorption is oscillatorily damped to its steady state and transient amplification without inversion can be realized;
当阻尼介质参数趋于零时，本文结果与无阻尼解一致。
When the damped parameter tends to zero, the result in this paper is consistent with the non-damped case.
阻尼器经过几年的运行以后，阻尼器内部的液压介质、密封件也会发生不同程度的老化，相对滑动的零件之间也会产生不同程度的磨损；
After several years' operation, hydraulic medium and sealing elements inside the damper also have different degrees of aging, and abrasion is also caused among relative sliding parts;
发动机液压支承是橡胶和液压阻尼元件的组合，具有低频高阻尼、高频低刚度的特点。中高级轿车均采用这种结构的发动机减震零件。
Combined with rubber damping and hydraulic damping, with the performances of low-frequency high-damp and high-frequency low-rate, hydraulic engine mount is mostly used in luxury-class passenger cars.
进行阻尼处理的原理就是将一种阻尼材料与零件结合成一体来消耗振动能量。
The principle that carries on the damping processing is to combine a kind of damping material and spare parts integral whole to consume vibration energy.
通过采用高低压回路和过阻尼驱动技术，解决了某一旋臂水池三自由度转盘机构横倾轴、纵倾轴零位准确定位及偏航轴精确位置调整等问题。
Through using the technology of high-low pressures and excessive-damping driving, the problems were solved for precision position adjustment of the swing axles in a three-freedoms swing-table.
通过采用高低压回路和过阻尼驱动技术，解决了某一旋臂水池三自由度转盘机构横倾轴、纵倾轴零位准确定位及偏航轴精确位置调整等问题。
Through using the technology of high-low pressures and excessive-damping driving, the problems were solved for precision position adjustment of the swing axles in a three-freedoms swing-table.
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