Research on the dynamic characteristics of the dynamic track stabilizer side searing
The dynamic characteristics of side bearing are one of the key factors for further study on the overall behaviour of the dynamic track stabilizer. The constitutive parameters of rubber spring were determined by the static experiment. Based on the parameters, the finite element model of side bearing was built and the reliability of side bearing model was verified by experiment. The vertical dynamic characteristics of side bearing were studied on the base of LS-DYNA. According to the analytical results, the dynamic characteristics of the side bearing spring constants and its internal damping are nonlinear under different compound of loads and frequencies. The conclusion can provide a theoretical basis to the optimal design of the side searing.
A Non-Linear Rubber Spring Model for Rail Vehicle Dynamics Analysis
SUMMARY A non-linear, dynamic rubber spring model is proposed. It mainly aims at representing the mechanical behaviour of rubber suspension components in rail vehicle dynamics. The model is one-dimensional, has five parameters and is based on a superposition of elastic, friction and viscous forces. The model is implemented in the computer packages MATLAB and GENSYS. Comparisons between model and measurement results for harmonic excitations show good agreement. A procedure to determine the model parameters from only two measured force-displacement loops is described. The model represents a reasonable compromise between accuracy and computational effort and should be a suitable tool in rail vehicle dynamics analysis.
Some aspects of the destruction of lysine under conditions of acid and enzymic hydrolysis of protein materials containing carbohydrates.
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