| 1. | The primary work of this thesis is as follow : ship motion is an important factor which effected missile initial disturbance 作为影响舰载导弹发射初始扰动的重要因素,对舰艇运动规律的研究非常重要。 |
| 2. | A simulation of the guidance scheme applied to the example tilt rotor vehicle exhibits satisfactory behavior in the presence of wind and initial errors 仿真结果表明,在初始扰动和有风作用下,垂直距离偏差均达到很小。 |
| 3. | One of the inequalities is that the initial disturbance amplitude is more than a critical value , and the other is that the frictional coefficient is more than another critical value 初始扰动振幅大于某一临界值; ( 2 )摩擦系数大于某一临界值,前者对后者有很强的约束。 |
| 4. | The main conclusions show as following : 1 the effects of propagating vortex rossby waves on tc intensity change are relative closely to the position , the size and intensity of the initial disturbance 主要结果可归纳如下: 1涡旋rossby波传播对热带气旋强度变化的影响,与初始扰动相对涡旋中心的位置、初始扰动尺度大小及强度等关系密切。 |
| 5. | Initial growths of disturbances are measured by means of hot - wire anemometry . due to the detected signals with low signal to noise ratio , the coherence function is used to eliminate background noise during data reduction 在扰动增长的初始阶段,信号的信噪比非常地低,根据相关谱分析方法,应用相干函数,将扰动信号有效地提取出来,测量了初始扰动的增长。 |
| 6. | Launch process of missile , especially initial disturbance , is an important direction of launch dynamics . with the development of compute simulation and launch dynamics , much technology and method has been researched in the area of launch process 导弹发射过程,特别是导弹的初始扰动是发射系统研究的一个重要课题,随着计算机仿真和发射动力学的发展,对导弹发射过程的研究也有许多不同的途径和技术。 |
| 7. | In the model , johnson - cook strength is combined with gurson - tvergaard - needleman yield criteria , and random distribution of microvoids is used . results show that quasi - periodic axial fracture will appear , which obstructs the mirror current of the armature 在给定微孔洞的初始扰动时,计算结果解释了铝电枢表面将要形成的不稳定性,它导致了电枢外表面出现周期性的轴向裂纹,阻碍了镜像电流,使fcg损耗增加。 |
| 8. | In chapter four , two distinct experiments , the control of free vibration and the control of steady vibration , are carried out to explore the feasibility and effectiveness of passive vibration control with piezoelectric shunt damping system 在压电分流阻尼被动振动控制理论分析的基础上,进行了悬臂梁在初始扰动下的瞬态振动响应控制和持续激励下的稳态振动响应控制实验,从而验证了压电分流技术应用于被动振动控制的可行性和有效性。 |
| 9. | The numerical models with the wall impulse as initial perturbation of turbulent spots were proposed . the above compact difference systems are used in the several typical flows , such as . the channel , open - channel and boundary layer flows the various complicated boundary conditions satisfying n - s equations are carefully conducted 建立了以壁面脉冲为初始扰动的湍斑数学模型,并将导出的navier - stokes方程的紧致差分方程组应用于槽道、明渠和平板边界层等典型流动,提出了严格满足navier - stokes方程的边界条件。 |
| 10. | Base on review of existed study and application in suppressing cable vibration in the world , technique of mitigating cable vibration with viscous damper and mr damper has been investigated in this dissertation , and the main contents and progresses in form of summary are as following : 1 the motion differential equations of the cable - damper system are formatted , which take into account these factors , such as the inclined angle , sag , stiffness etc . coupling motion between cable and deck is studied with analytical and numerical method . numerical results show that large amplitude vibration of cable with beat rhythm will occur when exciting frequency of deck equals two times modal frequency of cable 本文在对国内外斜拉索振动控制研究与应用现状进行综合评述、分析的基础上,针对上述问题进行了深入研究,具体的研究内容和取得的成果包括: 1 、建立了斜拉索-阻尼器系统运动方程,对拉索与桥面的耦合振动作了分析和研究,数值结果显示当桥面激振频率等于某阶拉索模态频率的两倍时,很小的初始扰动将引起拉索的大幅振动,并呈现拍振的特征,与实测的拍振信号一致。 |