地面接触压力

The results showed that middle aged women used greater force on contact and leaving phase;the muscle activity and balance control capability of middle aged women on the first metatarsus and heel area were better than those of elder women's.Middle aged women can generate more ankle movement while the other parts of the b...

结果显示：中年女性在行走时无论是在脚刚接触地面还是在离地时所用的力均大于老年女性；中年女性第一跖骨和足跟部位的肌肉活动和平衡能力控制优于老年女性；中年女性可以在身体其他部位运动的同时使踝关节产生更多的运动，并产生更大的水平力来确保压力中心处于支撑面范围内。

A large pneumatic tire may have very low ground-contact pressure, resulting in minimal disturbance to the surface and minimum rolling resistance.

一个大汽车轮胎可能有非常低的地面接触压力，导致在最低限度的干扰，表面上和最低的滚动阻力。

Finite element analysis model of 9.00 R 20 radial tire was built and the static stress－strain distribution in the contact area was analyzed.The material and geometric nonlinear properties,and the anisotropic property of composite materials as well as uncompressible property of vulcanized rubber were studied.The effects of quantity of deflection, inflated pressure and friction coefficient on stress distribution in the contacting area were analyzed.

建立了9.00R20子午线轮胎的有限元分析模型，从轮胎的材料非线性、几何非线性、橡胶帘线复合材料的各向异性，以及橡胶材料的不可压缩性等方面探讨了轮胎与地面的静态接触问题，分析了下沉量、充气压力及静摩擦系数等对轮胎静态接地面内应力应变场的影响。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。