It has been shown that the model presented here gives new results for infinitely long circular cylindrical shells and can lead to a good approximation for determining the fundamental longitudinal mode shape and the associated higher circumferencial mode shapes (n>3) of simply supported circular cylindrical shells of finite length.
The effects of longitudinal profile shape of high speed train head on aerodynamic performance are analyzed.
If the longitudinal profile shape of train head is spindle and streamline length of train head is 8m, aerodynamic drag of the train will well reduce.
In order to prove the effect of longitudinal profile shape of train head on aerodynamic performance, using CFD method, a two dimension model is developed to investigate outer flow field of high speed train head.
All the effective parameters can be written as follows: D_{text{L}} = f_{1} left( {rho,;mu,;u,;u_,;h,;w,;s_{f},;s_{n} } right), (8 where (rho) is fluid density; (mu) is dynamic viscosity; (w) is the width of cross section; h is flow depth; (u_) is share velocity; (s_{f}) is longitudinal bed shape; and (s_{n}) is sinuosity.
Similarly, E B v E B ∩ l v stands for a longitudinal segment of shape B. Figure 1 Illustrating the R-histogram.
The results are evaluated in terms of the strain heterogeneity along the longitudinal direction, the shape of the deformed billet, and the working load.
Quasi-static parameterisation tests include acquiring vertical tyre stiffness over a flat plate and cleats, tyre footprint sizes and shapes, longitudinal, lateral and torsional tyre stiffness for various tyre normal loads, as well as vibrational tyre responses.
With decreasing the spacing, the longitudinal ceiling flame shapes are divided into four categories, i.e., non-interaction flames, tilted flames without merging, merging ceiling flames and merging vertical flames.
