The Optimization on Tread Profile Based on Wheel-Rail Match

2014 ◽  
Vol 678 ◽  
pp. 591-596
Author(s):  
Huan Xie
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Behaviors ◽  
Wheel Rim ◽  
Curve Method ◽  
Driving Stability ◽  
Diameter Curve

The matching status of wheel/rail affect the driving stability and safety directly. It could improve the dynamic behaviors by optimizing the matching status of wheel/rail. Taking the wheel rim tread named LMa as an object, the wheel diameter curve method was used to optimize the profile of tread LMa. Then the dynamic behaviors of the optimized profile (LMa-G) were obtained by the dynamic analysis. The results obtained indicate that the profile of tread LMa - G showing better contact performance.

Effects of gearbox housing flexibility on dynamic characteristics of gear transmission system

2020 ◽  
pp. 107754632095373
Author(s):  
Xiannian Kong ◽  
Jinyuan Tang ◽  
Chen Siyu ◽  
Zehua Hu
Keyword(s):  
Dynamic Analysis ◽  
Natural Frequencies ◽  
Lightweight Design ◽  
Transmission System ◽  
Structure Design ◽  
Gear Transmission ◽  
Dynamic Responses ◽  
Dynamic Behaviors ◽  
Gear Transmission System ◽  
Rotor Bearing

The lightweight design of the gear system is the current tendency. The gearbox housing is modeled as a rigid body and is neglected in the gear dynamic analysis. It is of great significance to introduce the gearbox housing flexibility into the dynamic analysis and analyze the influence of the gearbox housing flexibility on the dynamic behaviors of the gear transmission system, as this can provide important instructions for the lightweight structure design of the housing. The gear–rotor–bearing model and the gear–rotor–bearing–housing model are established by the finite element node method. A Timoshenko beam element is used to represent the shafts. To illustrate the housing effect, two kinds of housing model are established: one tends to be rigid and the other to be flexible and lighter. The housings are simplified as a super element obtained by the dynamic substructure method. Natural frequencies and dynamic responses are illustrated to indicate the effects of housing flexibility. Comparisons of numerical results show that the rigid housing can be neglected for its little effect on the dynamic analysis. The flexibility of the housing slightly reduces the natural frequencies of the gear transmission system, and the maximum reduction is 6.05%. Meanwhile, the amplitudes of the first two resonance peaks of the dynamic transmission error decrease by 9.5% and 5.05%. Besides, more response peaks emerge at higher speeds when the flexibility of housing increases. The complete phenomena of dynamic behaviors of the gear transmission system can be obtained by considering the housing flexibility.

Three-Dimensional Dynamic Analysis Method of Multi-Component Mooring Lines

2019 ◽  
Author(s):  
Yuda Apri Hermawan ◽  
Yoshitaka Furukawa
Keyword(s):  
Dynamic Analysis ◽  
Numerical Method ◽  
Three Dimensional ◽  
Experimental Results ◽  
Mooring Line ◽  
Lumped Mass ◽  
Mooring Lines ◽  
Dynamic Behaviors ◽  
Component Object ◽  
Deep Depth

Abstract Complicated mooring system well-known as a multi-component mooring line is highly required owing to the deep depth of water and severe sea conditions. Since the dynamic behaviors of such mooring line are quite complex, proper numerical method is indispensable to predict the dynamic behaviors of a multi-component mooring line efficiently and precisely. In this paper, a numerical method improving the lumped mass method is proposed to introduce the three-dimensional dynamic analysis of multi-component mooring line with the motion of an anchor and clump weights. The mooring line is regarded as a multi-component object which has nonuniform segment line characteristics. In this method, lumped mass technique is developed to represent the three-dimensional dynamic behavior of each segment individually, allowing the motion of bottom-end segment as well as the anchor. Then, the motion of the end-segment is regarded as the motion of the upper-end of lower segment. Meanwhile, calculation method of initial condition for dynamic calculation is developed by adopting the basic principle of multi-component mooring line catenary equations. The results of time histories representing the three-dimensional dynamic analysis of mooring line are obtained and compared with other numerical and experimental results presented in published papers. The results show good agreement with both numerical and experimental results.

Dynamic Analysis of Frame-Shear Wall Structure of Concrete Filled Steel Tube under Rare Earthquake

2011 ◽  
Vol 368-373 ◽  
pp. 3624-3627
Author(s):  
Xiao Hu ◽  
Yong Tao Gao
Keyword(s):  
Dynamic Analysis ◽  
Structural Design ◽  
Shear Wall ◽  
Steel Tube ◽  
Wall Structure ◽  
Dynamic Behaviors ◽  
Earthquake Resistant ◽  
Calculation Results ◽  
Rare Earthquake ◽  
Seismic Behaviors

.In this paper, seismic behaviors of the frame-shear wall structure, which are composed of the concrete filled steel tubular (CFST) column, have been studied. Dynamic behaviors and earthquake responses of the CFST under rare earthquake are analyzed. Comparing the calculation results, the earthquake resistant behavior of the CFST structure has been appraised synthetically, which may be referential for structural design.

Dynamic Analysis and Simulation of Vehicles Carrying Liquids During Braking

2005 ◽  
Author(s):  
Mohammad Biglarbegian ◽  
Jean W. Zu
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Models ◽  
Volume Of Fluid ◽  
Suspension System ◽  
Vehicle Body ◽  
Dynamic Behaviors ◽  
Coupled Equations ◽  
Tire Dynamics ◽  
To Come

This paper presents two dynamic models of vehicles carrying liquids, namely single tractor and tractor-semitrailer. Both models incorporate suspension system and tire dynamics. Vehicles carrying fluids feature two subsystems: vehicle body and fluid subsystems. These two subsystems are coupled and to simplify the complicated solution, the coupled equations are solved separately using two different codes. Different braking moments are applied to the models and their dynamic behaviors are determined. It is shown that tractor-semitrailers need more braking moment than single tractor ones. As well, it turns out vehicles carrying fluids need a greater amount of moment in comparison to vehicles carrying solids to come to a complete standstill. Lastly, as the level of fluid inside the tanker increases (33% to 66%), the sloshing forces to the tanker’s walls increase. Therefore, it is revealed that tankers should be specially designed to address the characteristics and volume of fluid inside the tanker.

Dynamic Analysis Method for Electromagnetic Artificial Muscle Actuator under PID Control

2011 ◽  
Vol 131 (2) ◽  
pp. 166-170 ◽  
Author(s):  
Yoshihiro Nakata ◽  
Hiroshi Ishiguro ◽  
Katsuhiro Hirata
Keyword(s):  
Dynamic Analysis ◽  
Pid Control ◽  
Artificial Muscle ◽  
Analysis Method
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