为解决煤柱强度与刚度的计算问题，首先要进行应力场分析。

For solving calculative problems of the intensity and rigidity of coal pillars, stress field must be analyzed first.

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钢板弹簧作为汽车的重要部件，它的强度与刚度对汽车的性能影响很大。

Spring is a major assembly and its strength and stiffness can affect the performance of a vehicle.

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用传统方法求解有复杂载荷作用的传动轴的强度与刚度，需要十分繁重的计算工作量。

Using traditional method to solve strength and stiffness problem with drive shaft under complex loads features boring and arduous calculation work.

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