背压力

With the help of nonlinear finite element software ADINA, the distribution pattern and magnitude of back earth pressure of the anchor slab retaining wall with double layered anchor plate with various material parameters were analyzed, and the factors

摘要应用ADINA非线性有限元软件分析各种材料参数下，两层锚定板挡墙在重力荷载作用下的墙背土压力的分布规律及大小，探讨了影响土压力的因素。

Secondly, the numerical model is used to analyze the influence of thickness of flexible wall on earth pressure distribution, the coefficient of earth pressure and the application point of the resultant force.

其次，对不同刚度的柔性挡墙在典型鼓型变位模式下的墙背土压力分布、土压力系数和合力作用点高度进行了数值研究。

Lever Ball Float Steam Traps biggest advantage is not subject to pressure,temperature,cooling water flow fluctuations,continuous drainage,a water that row,the minimum cooling degree 0℃,能使best efficiency heating equipment;lever float steam trap valve seat total in the following level,forming awater seal,no steam leakage;itsPlug Valves minimum working pressure 0.01Mpa,the maximum back pressure rate of≤85%;interior with exhaust,lever float steam traps use the most advanced components as the automatic emptying of diaphragm valves,can automatically exclude non-condensing gas,very sensitive,high quality work and long service life.

杠杆浮球式蒸汽疏水阀的最大优点是不受压力、温度、冷凝水流量波动的影响，连续排水，有水即排，最小过冷度为0℃，能使加热设备达到最佳工作效率；杠杆浮球式蒸汽疏水阀的阀座总处于液位以下，形成水封，无蒸汽泄漏；它的最低工作压力0.01Mpa，最大背压率≤85%；内部带有排气装置，杠杆浮球式蒸汽疏水阀采用最先进的膜盒元件做为自动排空气阀，能自动排除不凝结气体，非常灵敏，工作质量高，使用寿命长。

During the formingoperation, the medium is pumped under pressure into the cavity on one side of thesheet to be formed and controllably released through a single or multiple portsfrom the other side, and then the pressure distribution on the blank can be variedspatially and as a function of time.

粘性压力成形技术(即VPF，Viscous Pressure Forming)是采用粘性物质作为传力介质，在板料两面通过介质同时施加正压或背压，在模具型腔中形成非等静压场，从而在板材表面不同区域产生不同的压力分布。

DM soft tissue less and stiffer than healthy group, it's the major factor to cause high forefoot pressure, the ankle dorsiflexion is the 2nd reason, the calcaneus tendon geometry shape was not different between two group.

左脚压力较右脚大之原因为惯用侧，神经病变受测者因本体感觉较差与关节活动度受限使接触时间增加，进而提高压力时间积分，糖尿病足的二、三和四跖骨大於正常足，糖尿病跖骨软组织厚度少於正常足且较硬，此为影响前足受压力影响的主因，背屈则次之，而跟腱的几何尺寸两者并无差异。

The assembly of journal and plain bearing liner space is too little, force of organic still oil pressure is small it is the crucial index that affects lubricant result, make lubricate because of lacking engine oil between crankshaft and plain bearing liner and bite dead invalidation, include to be pulled badly, lack lube, layer of alloy of dry attrition generation is fused, grind sliding surface to did not maintain the oily film of certain ply, and all sorts of local overload exhaustion are destroyed, cavitation erosion and V form are destroyed etc, through technology of him director diesel locomotive old experience reachs the analysis of pair of its breakdown reasons, put forward precautionary measures especially. As a result of,the burns caustic mechanism plain bearing liner to burn caustic mechanism of 1 plain bearing liner is the lube film burst between journal and plain bearing liner, cause plain bearing liner and crankshaft generation clash, below high temperature, high pressure and high rotate speed, the wear-resisting alloy layer of plain bearing liner wears away prematurely or fuse, cause plain bearing liner and crankshaft to stick thereby bite, can make the steel back of plain bearing liner and Kong Zhong produces whirligig, inlet port is jammed, carry on the back by steel again with the friction of aperture causes high temperature to make plain bearing liner burned-out further, can cause bolt to break off, happen swing a malign accident that pounds cylinder body of bad internal-combustion engine.

轴颈和轴瓦的装配间隙太小，还有机油压力低是影响润滑效果的关键指标，使得曲轴和轴瓦之间因缺少机油润滑而咬死失效，包括严重拉伤，缺少润滑油，干摩擦产生合金层熔化，磨滑面没有保持一定厚度的油膜，以及各种局部过载疲惫破坏，气蚀和V形破坏等，通过本人主管内燃机车技术多年经验及对其故障原因的分析，特提出预防办法。1轴瓦的烧损机理轴瓦烧损的机理是由于轴颈和轴瓦之间的润滑油膜破裂，导致轴瓦和曲轴产生摩擦，在高温、高压和高转速下，轴瓦的耐磨合金层过早地磨损或熔化，从而引起轴瓦和曲轴粘咬，会使轴瓦的钢背和座孔中产生旋转运动，进油孔被堵塞，再由钢背和座孔的磨擦进一步引起高温使轴瓦烧坏，并会造成螺栓折断，发生甩出捣坏内燃机缸体的恶性事故。

Is used to prevent Plug Valves the liquid in grity grity, which is generally used when the pressure can be greater than the liquid itself, such as the level of 2 meters to prevent the medicine chest in the liquid grity may make use of the pressure is higher than 0.02MPa back-pressure valve, the general metering pumps can be selected 0.1MPa.

用于防止液体在重力作用下自流，这时候一般选用大于液体自身压力即可，如防止液位为2米药箱中的液体自流，可选用压力大于0.02MPa的背压阀，一般计量泵选用0.1MPa即可。

Lever Ball Float Steam Traps are not subject to the greatest advantage of pressure, temperature, condensate water flow fluctuations, continuous drainage, water that is exclusive, the Butterfly Valves minimum undercooling of 0 ℃, heating equipment can achieve the best efficiency; Lever Ball Float Steam Traps seat total in the level below, the formation of water seal, no steam leakage; its minimum working pressure 0.01Mpa, the biggest back-pressure rate of ≤ 85%; house with an exhaust device, lever float steam trap uses the most advanced components as the automatic emptying of diaphragm valves, can automatically rule out non-condensing gas, very sensitive, high-quality work and long service life.

杠杆浮球式蒸汽疏水阀的最大优点是不受压力、温度、冷凝水流量波动的影响，连续排水，有水即排，最小过冷度为0℃，能使加热设备达到最佳工作效率；杠杆浮球式蒸汽疏水阀的阀座总处于液位以下，形成水封，无蒸汽泄漏；它的最低工作压力0.01Mpa，最大背压率≤85%；内部带有排气装置，杠杆浮球式蒸汽疏水阀采用最先进的膜盒元件做为自动排空气阀，能自动排除不凝结气体，非常灵敏，工作质量高，使用寿命长。

Study was conducted regarding to the relationship between the lateral earth pressure, the acting point of resultant force and the resulting turning moment to the back of retaining walls, and the deformed ground profile of backfills.

在挡土墙平移各历程阶段，研究挡土墙背水平向侧土压力、挡土墙背水平向侧土压合力作用点与倾覆力矩和填土地表变形轮廓等之关系，并就填土地表急剧区间与经典库仑理论平面滑动面位置作比较探讨。

The results indicate that,the CPR of venturis with reasonable design and suitable technics is obviously higher than critical pressure ratio.

实验结果表明：设计合理、工艺合适的Laval喷管，临界背压比明显高于临界压力比，而且，比热容比越小，表面粗糙度等级越高，喉道直径越大，对应的临界背压比越大。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。