Dynamic Simulation Analysis of Shipborne Missile Launching under High-Wave-Level Environment

2012 ◽  
Vol 569 ◽  
pp. 380-385
Author(s):  
Zhou Zhong ◽  
Yi Jiang ◽  
Yong Yuan Li ◽  
Chong Zhang
Keyword(s):  
Dynamic Response ◽  
Dynamic Model ◽  
Dynamic Simulation ◽  
Simulation Analysis ◽  
Simulation Method ◽  
Flexible Coupling ◽  
High Wave ◽  
Model And Simulation ◽  
Coupling Dynamic ◽  
Coupling Dynamic Model

In order to study the dynamic response of shipborne missile vertical launching under high-wave-level environment, the rigid-flexible coupling dynamic model of launching system was built by ways of virtual prototype technology. According to simulations for different launching conditions, missile attitude parameters were acquired, and interference of various parts was analyzed. The result shows that the dynamic model and simulation method proposed in this paper are effective and practicable.

scholarly journals A 3D Direct Vehicle-Pavement Coupling Dynamic Model and Its Application on Analysis of Asphalt Pavement Dynamic Response

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Peng Cao ◽  
Changjun Zhou ◽  
Decheng Feng ◽  
Youxuan Zhao ◽  
Baoshan Huang
Keyword(s):  
Finite Element ◽  
Dynamic Response ◽  
Dynamic Model ◽  
Static Analysis ◽  
Moving Load ◽  
Dynamic Responses ◽  
Pavement Surface ◽  
Coupling Dynamic ◽  
Pavement Structure ◽  
Coupling Dynamic Model

Currently dynamic response of the pavement structure is widely studied in pavement engineering. A 3D direct vehicle-pavement coupling dynamic model was developed to describe the pavement dynamic responses in this paper. The moving vehicle was simplified as spring-dashpot components, and the pavement structure was simulated using three-dimension finite element model. Based on Newton iteration and central difference integration algorithm, the static and dynamic coupling reactions between the pavement structure and vehicle were considered using finite element platform ABAQUS. The numerical results fit analytic results very well in static analysis and fit experiment results in dynamic analysis well too. The simulated results indicate that the dynamic pavement surface deflection is much higher than the situation in static analysis, due to the overlapping effect. This phenomenon enhances when vehicle speed increases. A discontinuous zone of shear stress was observed on the base surface between the location under moving load and the location the moving load just passed. It was also found that the vertical fluctuation exists on the vehicle even if there is no roughness on the pavement surface. In general, the developed 3-D direct vehicle-pavement coupling dynamic model was validated to be effective on evaluating pavement dynamic responses.

Dynamic Simulation for Driver-Tricycle-Road System with Rigid-Flexible Coupling

2011 ◽  
Vol 421 ◽  
pp. 240-245
Author(s):  
Xiang Han
Keyword(s):  
Dynamic Simulation ◽  
Dynamic Theory ◽  
Dynamic Performance ◽  
Flexible Body ◽  
Tire Model ◽  
Performance Simulation ◽  
Flexible Coupling ◽  
The Road ◽  
Coupling Dynamic ◽  
Coupling Dynamic Model

Performance simulation for driver-tricycle-road hasn’t been reported currently. According to rigid-flexible coupling dynamic theory, this article took the frame and the spring as the spatial flexible body, used the UA tire model, considered the engine and the road surface drove, established tricycle rigid-flexible coupling dynamic model based on driver-tricycle-road environment and simulated its system modality, acceleration and brake dynamic characteristic. The simulation result indicated this tricycle has the good dynamic performance and the conclusion has the important project practical value.

Research on the Initial Disturbance of Vehicular Missile with System Vibration Analysis

2012 ◽  
Vol 625 ◽  
pp. 134-139 ◽  
Author(s):  
Chong Zhang ◽  
Yi Jiang
Keyword(s):  
Flow Field ◽  
Dynamic Simulation ◽  
Vibration Analysis ◽  
Jet Flow ◽  
Initial Disturbance ◽  
Flexible Coupling ◽  
Study Results ◽  
System Vibration ◽  
Coupling Dynamic ◽  
Coupling Dynamic Model

This paper is based on the complex multiple vehicular missile launch simulation model, researches the influence of combustion jet flow to the initial disturbance of missile. It establishes rigid-flexible coupling dynamic model by use of Adams and Ansys, and calculates the value of combustion jet flow field in missile box by means of Fluent. The rigid-flexible coupling dynamic simulation for the whole launch process is carried out. The study results show that the simulation with loading jet flow can accurately tend to real launch environment, it has great significance to optimize the simulation and to improve the accuracy of the simulation.

Rigid–flexible coupling dynamics analysis with joint clearance for a 5-DOF hybrid polishing robot

Robotica ◽  
2021 ◽  
pp. 1-21
Author(s):  
Feng Guo ◽  
Gang Cheng ◽  
Shilin Wang ◽  
Jun Li
Keyword(s):  
Dynamic Model ◽  
Parallel Manipulator ◽  
Dynamic Properties ◽  
Dynamic Performance ◽  
Joint Clearance ◽  
Motion Error ◽  
Flexible Coupling ◽  
Coupling Dynamic ◽  
Equivalent Load ◽  
Coupling Dynamic Model

SUMMARY Considering the polishing requirements for high-precision aspherical optical mirrors, a hybrid polishing robot composed of a serial–parallel manipulator and a dual rotor grinding system is proposed. Firstly, based on the kinematics of serial components, the equivalent load model for the parallel manipulator is established. Then, the elastodynamic model of kinematic branched-chains of the parallel manipulator is established by using the spatial beam element, and the rigid–flexible coupling dynamic model of the polishing robot is obtained with Kineto-elasto dynamics theory. Further, considering the dynamic properties of the joint clearance, the rigid–flexible coupling dynamic model with the joint clearance for the polishing robot is established. Finally, the equivalent load distribution of the parallel manipulator is analyzed, and the effect of the branched-chain elasticity and joint clearance on the motion error of the polishing robot is studied. This article provides a theoretical basis for improving the motion accuracy and dynamic performance of the hybrid polishing robot.

Vibration analysis of a flexible gearbox system considering a local fault in the outer ring of the supported ball bearing

2020 ◽  
pp. 107754632093688
Author(s):  
Jing Liu ◽  
Lei Yuan
Keyword(s):  
Dynamic Model ◽  
Transmission System ◽  
Gear Transmission ◽  
Ball Bearings ◽  
Transmission Characteristics ◽  
Flexible Coupling ◽  
Flexible Shaft ◽  
Gear Transmission System ◽  
Coupling Dynamic ◽  
Coupling Dynamic Model

Ball bearings are key components in the gear transmission system. Supported ball bearings have great influences on the vibrations of the gear transmission system, especially the presence of the local faults. Although some reported works formulated the local fault in the supported bearings of the gear transmission system, the box and shaft were considered as rigid bodies. To overcome this problem, a rigid-flexible coupling dynamic model for a flexible gearbox with the supported ball bearings is developed, which cannot be described by the previous multibody models. The local fault in the supported bearing is described by a time-varying impact force model with a half-sine profile. The bearing clearance, flexible shaft, and box are considered in the rigid-flexible coupling dynamic model. The flexible shaft and box are formulated by a finite element method. The damping and contact stiffness in the bearings and gears are obtained by the previous methods in the listed works. The frictions between the mating components are formulated by the Coulomb friction model. An experimental study is applied to validate the rigid-flexible coupling dynamic model. The effects of the faults on the vibration transmission characteristics are investigated. The results provide that the local fault in the supported bearings will greatly affect the vibrations of the gearbox system. Moreover, it depicts that the vibration collection point for the defective bearings should be located at the same side to obtain better singles. This work can provide a more reasonable method for understanding the vibration transmission characteristics of the gearbox system with the local faults in the supported bearings than the reported multibody models.

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