bifurcation
Theory of Periodic and Quasi-Periodic Orbits Surrounding the Collinear Libration Points
There are plenty of families of periodic orbits surrounding the collinear libration points in Circular Restricted Three-body Problem(CRTBP) model. Compared with the periodic orbits of restricted two-body problem, the orbits surrounding the collinear libration points have distinct differences in space configuration, constructing methods and stability. These orbits provide more extensive orbit selection for deep space [...]
Study of Chaos and Its Control in the DC-DC Converters
DC-DC switching converter is an important part of power electronics, belonging to strong nonlinear time-varying systems. In the course of their traditional research, which rarely involves the study of nonlinear phenomena. However, in the actual design process of the switching converter, sometimes we would find a number of non-normal phenomena, such as that output voltage [...]
Experimental Study on Stability Quantitative Analysis Method in Rotor System with Lubricated Bearings
Large-scale rotary machines are key equipments in national basic industry. The safety in productions is of very significance to social life and economic development. Rotor-bearings system is the kernel mechanism rotary machinery, which stability is key to safe operation. It is not only a great basic scientific research subject to study the stability of rotor [...]
A Study on the Vibration Reduction and Stability of the Structure with TMD in Impacting
With the development of science and technology, more and more tall buildings with high-strength lightweight material are continuously appearing. The tall buildings become more flexible and light damping, so that the amplitudes of the structure’s top become increasing under wind. For the sake of comfortable life and structure safety, it is necessary to control the [...]
Nonlinear Dynamics of Panels in Supersonic Airflow
The panel is an important structure in modern aerospace vehicles. In the circumstance of high-speed airflow, a static deformation as buckling of the panel can occur, and the flutter may be encountered, which always leads to the fatigue failure of the panel and has harmful influence on the structure reliability. In addition, when the high-speed [...]
Study on the Nonlinear Dynamic Problems of Rotor-Seal-Bearing System Based on Hamilton Principle
Steam turbine-generating unit is the original motive and the key link of energy production. With the development in science and technology, the capacity of steam turbine-generator unit, as well as the operating parameters is continuously increasing, and toward the direction of high-speed, multi-span and heavy loads. Since the steam turbine rotor structures are getting more [...]
Study on the Static and Dynamic Characteristics of Self-Acting Gas Bearing
Study on the static and dynamic characteristics of the gas bearing and the dynamic characteristics of the gas bearing-rotor system are the key theoretical content of the design of rotary machinery with the gas bearing support. The static and dynamic characteristics of self-acting gas bearing and the corresponding bearing-rotor system are studied.The main contents are [...]
High Speed Ball Bearing-Rotor System Comparative Study of Nonlinear Dynamics
With the production and scientific and technological development, rotary machines are towards higher-speed, stronger in load-capacity, lighter in weight and more automated. These machines are playing important roles in various engineering fields. In order to ensure the safe operation of the rotor system supported by rolling bearings, it is necessary to study non-linear dynamic characteristics [...]
The Research of Chaos Control Technology and Application in Flyback Converter
Chaos is a kind of”uncertainty”phenomenon in deterministic system. It is mainly produced in the non-linear system. Switching power supply is a strong non-linear dynamic system, with a wealth of nonlinear phenomena. In a certain parameter conditions, the switching power supply will produce chaos. Therefore, by right of chaos in switching power supplies can be non-linear [...]
Research on the Lubrication and Rub-impact Characteristics between the Stern Shaft and the Stern Tube Bearing
The stern shaft is an important part of the marine propulsion shafting, the stern tube bearing not only supports its own gravity is also supporting the hull weight of the propeller. So the stern tube bearing withstands the largest load in the ship shaft bearings. Now, with the increasing tonnage of ship, the increasing gravity [...]