This paper applies the general powerful finite element analysis software ANSYS to analyze and calculate vibration frequency and vibration pattems of a widely used type of tower crane,making preparations for the following dynamics response analysis of this type of crane.
The working principle of mechanical arm was drew up, the dynamics equation of mechanical arm being controlled was established, the gain of PD controller was designed by the use of optimized algorithm, and the rigid body dynamics response of mechanical arm under different angles was calculated.
By employing a finite element method with equal-parameter elements a nonlinear dynamics model was set up for the shafting of a Chinese-made 600MW Turbogenerator. With the use of a finite element analysis program ADINA an analysis and a calculation were conducted of the nonlinear dynamics response of the 600MW turbogenerator shafting.
Based on the equation of structure dynamics, the state equation of structure dynamics response problem is derived by stute space being introduced- rvrthermore,the iteration scheme is presented for the calculation of structure dynamics response.
(3) Realize the accurate analysis of the dynamics response of linear hybrid multibody systems.
It is emphasized that slamming should be considered in the framework of structural dynamics response and integrated with the global flow analysis around a ship or ocean structure or with violent fluid motion inside a tank.
The results show that the dynamics response of casing pipe obviously increases, and the complicated response behaviors of casing pipe are described under combined wavecurrent.
Nonlinear dynamics response of casing pipe under combined wave-current
The results show that material nonlinear may result in anomalous dynamics response.