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设计试验的英文

  • design test

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  • 例句与用法
  • 3 a few experiments of interaction of composite and supporting layer material are introduced . a instrument is designed by oneself to test the frictional behaviour of composite geomembranes and supporting layer material . through analyzing the test , the frictional regulation of composite geomembranes and supporting layer material are acquired
    3 、介绍了土工膜与垫层材料相互作用的相关试验,针对复合土工膜与垫层材料之间的摩擦特性,自行设计试验装置进行了复合土工膜与两种垫层材料间的摩擦特性试验,并对实验结果与已有成果进行了分析比较,得出复合土工膜与垫层材料的摩擦特性的一般规律,为土工膜的防渗设计提供参考依据。
  • Two different reinforcing methodologies are applied : modification of the overlay characteristics by adding chopped glass fibers to the hot mixture asphalt ( hma ) and reinforcing asphalt overlay with glass grids . theory of fracture mechanics ( fm ) is employed to determine crack growth rates for the suggested anti - cracking overlay systems . asphalt mixture designing tests , three point bending tests and fatigue crack propagation tests were carried out . the critical stress intensity factors kic are determined for plain and reinforced asphalt concrete . depending on the fatigue crack propagation , the crack growth rate is determined for each type of anti - cracking system and the cracking process is also analyzed . one of the significant points in this study is the attempt to give better understanding of the crack propagation for multilayer asphaltic overlay or what are suggested herein to be called composite structure anti - cracking overlay system . the results indicate that the reinforcing materials improve anti - cracking characteristics of the asphalt concrete . composite structure anti - cracking overlay gives a good solution for the reflective cracking phenomenon over old cracked pavements
    利用2种不同的方法加筋沥青罩面:在沥青混合料中加入短切玻璃纤维改善沥青混凝土的特性,采用玻璃格珊加筋沥青混凝土.应用断裂力学方法分析沥青路面裂缝扩展机理.采用沥青混合料设计试验、三点弯曲试验和疲劳裂缝扩展试验,确定加筋沥青混凝土的临界应力强度因子kic ,测量每一种沥青罩面抗裂系统的裂缝扩展速率.本研究的主要特点是提出复合型抗裂罩面系统,分析了多层加筋沥青罩面裂缝扩展过程,推荐了若干沥青路面抗裂系统.结果证明,加筋材料可以提高沥青罩面的抗裂特性,复合型抗裂罩面系统能够有效地阻止反射裂缝的扩展
  • The results indicated that the dimension , shape and purity of base material could meet the functional demand of solid lubricant ; the thermal decomposition temperature of ptfe resin exceeds 400 c , but organic and inorganic packing filler added in ptfe made the water absorption rate of composite material increased , melting temperature and decomposition temperature decreased , in the meanwhile oxidative decomposition reaction was accompanied ; polar groups such as c = o , c - o - c and so on in the carbon fiber surface is advantageous to increase compatibility with other components and interlayer shearing strength ; uniform design experimental method could help to find the relationship between formula and frictional property by relatively small tests . the developing trend of each formula ' s friction coefficient could be showed by fitting curve ; the friction coefficient with no copper powder or graphite in formula was relatively big . this fact showed that copper powder and graphite should be used cooperatively ; it was found that when the ratio of copper powder to graphite by weight is 15 : 60 , 30 : 30 - 40 and 60 : 15 - 30 respectively , the friction coefficient was relatively small . the degree of crystallinity of pure ptfe reached maximum by air cooling and the abrasion loss also reached maximum among three ones ; at the same time , the abrasion loss of solid lubricant sample was also the biggest among three ones ; when solid lubricant matched with 45 # steel axle or gcrl5 steel axle , lubricant transfer film could be formed on metal surface , thus direct contact between the surface of metal friction pair rings was reduced . their working life was elongated extremely ; there was mainly much graphite , a little ptff , moo3 , feso4 , cus and so on in lubricant transfer film
    试验结果表明:所选原料的尺寸、形状及纯度可满足固体润滑剂的性能要求;聚四氟乙烯树脂热分解温度超过400 ,但在ptfe中加入无机填料会使复合材料吸水率提高,熔融温度及分解温度降低,且伴有氧化分解反应;碳纤维表面含有c = o及c - o - c等极性基团,有利于提高其与其它组分的相容性,提高层间剪切强度;均匀设计试验方法能够用较少的试验次数找出配方与摩擦性能间的关系,拟合曲线基本能表示各配方的摩擦系数发展趋势;配方中不加铜粉或不加石墨,其摩擦系数均较高,说明铜粉和石墨应该配合使用;当铜粉15份、石墨60份时,铜粉30份、石墨30 - 40份时,铜粉60 、石墨15 - 30份时,摩擦系数均具有较低值;纯聚四氟乙烯树脂在空气冷却时结晶度最大,磨损量也是三者中最大的;同时,固体润滑剂试样在空气冷却时的磨损量也是三者中最大的:不论是固体润滑剂与45 #钢轴配副或是固体润滑剂镶嵌入铜套后与gcr15钢轴配副,在金属表面均可形成润滑转移膜,从而减少金属摩擦副表面间的直接接触,大大延长其使用寿命;转移膜中主要含有较多的石墨、少量聚四氟乙烯、 moo 。
  • Abstract : this paper introduces bridge section model tests in the wind tunnel . it presents static forces on bridge section models . the effects of bridge fences , isolation belts and different model lengths on static forces are studied . the static and dynamic stabilities of bridge are analyzed . the results show the effect of bridge fence , isolation belts and different model lengths on static forces should be considered in wind load design
    文摘:通过桥梁节段模型风洞试验测量了桥梁的风力,研究了桥面护栏和隔离带以及变模型长度对模型风力的影响,并分析了桥的驰振稳定性和颤振稳定性.试验结果表明:设计试验方案以及应用试验结果时应考虑模型长度、桥面护栏及隔离带的影响
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Last modified time:Sun, 10 Aug 2025 00:29:56 GMT

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