The wheel-rail force produced by the running of certain metro vehicle is calculated by wheel-rail coupling model.

利用轮轨耦合模型，计算某城市地铁列车运行时产生的轮轨力。

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Based on the analysis of the dynamic response of the rail to the train loads, the expression of wheel-rail force is derived using two systems mass model.

轮轨力测量是车辆动力学理论与实践的重要环节，测力轮对是测量轮轨力最直接最准确的方法。

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When train runs from the rail of high rigidity to the rail of low rigidity, the rail vertical force, rail acceleration and tie acceleration gradually change from large to small.

当列车从高刚度轨道到低刚度轨道时，钢轨垂直力、钢轨加速度、轨枕加速度是由大逐渐减小，没有突变。

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Moreover, powerful interests, including the Air Force and the rail industry, are pushing for coal.

FORBES: Coal's Many Friends

Immediately after Scott's decision, state jockeying to take Florida's share of rail funding began in full force -- including immediate overtures from Illinois, California and New York.

CNN: States hope to cash in on Florida's rejection of rail funds

The Chinese government said Wednesday that it will force high speed rail operators to reduce average operating speeds due to safety concerns following a two-train collision that killed 40 people an injured around 200 more last month.

FORBES: After Train Wreck, China Tells Bullet Trains To Slow Down