我国已成为世界轮胎大国,标志为强大的内需、轮胎产量世界第一、轮胎规格齐全和原材料国产化率高。与轮胎强国相比,我国轮胎工业仍存在产品技术附加值低、缺乏新理论、自动化程度低和轮胎企业集团化程度低的差距。要实现轮胎强国的目标,我国轮胎行业应该提高整体科技水平,大幅提升产品技术附加值,实现轮胎企业大集团化。

China has become one of the major countries in tire production and consumption, with strong domestic demand, the biggest tire production capacity in the world, full range of products and very high rate of localized material supply. However, compared with the tire powers, there is still improvement space for China’s tire industry. For example, most products are low-tech and low value-added, the tire production only has low degree of automation, and tire companies are still under development and usually don’t have strong R&D capability. Therefore, the key development needs of China’s tire industry are overall technological level, high value-added products, and the emergence of large and modern tire enterprise groups.

轮胎嵌入式超高频无源RFID系统在轮胎生命周期管理和安全监控中将发挥十分重要的作用。为此,该文研究了轮胎嵌入式超高频无源RFID系统功率传递特性。轮胎嵌入式超高频无源RFID系统中,读写器和电子标签间的无线链路需要穿过空气和轮胎,路径损耗主要包括空气-轮胎界面间的反射损耗和轮胎中的衰减。基于轮胎介电常数和空气-轮胎界面的边界条件,研究轮胎嵌入式超高频无源RFID系统功率传递特性,提出了一种基于终端开路同轴探针的轮胎介电常数的比对测量方法,建立了轮胎嵌入式超高频无源RFID系统功率传递模型。数值分析表明,提出的基于端开路同轴探针的轮胎介电常数的比对测量方法误差小,测量、仿真的反射系数差的绝对值小于0.04,而为了提高轮胎嵌入式超高频无源RFID系统读取距离和可靠性,读写器天线应采用水平极化方式,并且尽可能直视电子标签;应合理设计电子标签嵌入轮胎的深度,避免功率传递函数处于波谷位置。该研究可为轮胎嵌入式超高频无源RFID电子标签与胎压监测系统的设计提供参考。

Acting as sensors, passive radio frequency identification devices (RFID) tags can avoid sensor nodes bulky and realize battery-powered. So, ultra high frequency (UHF) passive RFID tags embedded in tires have a deep impact on tire life cycle management and tire monitoring,and have been used widely in the USA and the European Union. However, the transmission range is one of the hardest challenges in UHF passive RFID embedded in tires, because the rubber makes it harder to read the tag. The main difference between the common RFID and RFID embedded in tires is the communication medium, which attenuates RF power from the reader in RFID embedded in tires. To improve the transmission range and reliability of RFID embedded in tires, it is of great concern to study power transmission of wave propagation for UHF passive embedded RFID in tires, because the tags do not contain any battery and rely on the electromagnetic field for both power and communication. In this work, we studied the power tra

2013年我国轮胎工业呈现量增价跌态势，市场形势总体较好，全钢载重子午线轮胎行业集中度相对较高。在美国进口轮胎中，源自我国的轿车轮胎和轻型载重轮胎进口量占比30%，达到5120万条；中/重型载重轮胎进口量占比65%，达到630万条。预计2014年美国的轮胎市场需求量增长。我国轮胎企业应通过提升产业集中度、采取品牌营销策略、扩张海外产能、推进产业升级、加强研发能力等战略提升产品的国际竞争力。

In 2013, China’s tire industry was featured by volume increase and price drop. The market situation was good and the industry concentration of TBR tire was relatively high. In the imported tires in the USA, 30%of car tires and light truck tires (51.2 million) and 65%of medium/heavy truck tire (6.3 million) were imported from China. The USA tire market demand is still expected to grow in 2014. In order to improve the product competitiveness, China’s tire industry should increase the degree of concentration, and the tire enterprises have to build a brand marketing strategy, expand overseas production capacity, speed up product upgrading and strengthen R&D.

轮胎和路面特性对车辆制动稳定性具有重要影响.基于路面分形理论和GW接触理论,对轮胎路面实际接触面积模型和粘弹性能量损失进行了简化,建立了改进的滑动摩擦因数模型,着重分析了轮胎和路面特性对滑动摩擦因数的作用;通过引入Fiala非线性轮胎模型,考虑了轮胎和路面特性对轮胎作用力的影响;根据15DOF整车模型的适当简化,提出了考虑轮胎动摩擦特性的整车模型.应用PC-Crash对整车模型进行了验证,使用Matlab对模型进行了仿真分析.结果表明:该模型能够表征轮胎和路面特性对车辆制动稳定性的影响,为研究车辆制动时各轮胎动态力差异提供理论基础.

The tyre and pavement features have a great influence on the vehicle braking stability. Based on the theo-ry of pavement fracture and the GW contact theory, the real contact area model and the viscoelastic energy loss of tyre-pavement are simplified. An improved sliding friction factor model is proposed for analyzing the impact of the tyre and pavement feature on the sliding friction factor;through the introduction of the nonlinear Fiala tyre model, the impact caused by tyre and pavement to the tyre force are considered. A new vehicle model which considers the dynamic friction characteristic of tyre has been proposed on basis of the simplification of the 15 DOF vehicle model. PC-Crash is applied for verifying the vehicle model and Matlab is used to carry out simulation analysis for the mod-el. The results show that, the model may accurately characterize the influence caused by the tyre and pavement characteristics to the vehicle braking stability, providing a theoretical basis for rese

考虑悬架的垂向特性,在Abaqus中建立车身-悬架-轮胎-路面系统有限元模型,实现了轮胎在路面上动态滚动,以及在Virtual.Lab中建立了轮胎声学边界元模型,仿真计算了轮胎在动态滚动过程中的结构振动噪声.结果表明:胎面花纹块与路面的周期碰撞是轮胎结构振动噪声的主要噪声源,并由整车轮胎噪声实验得到了对比验证.

A body-suspension-tire-road system finite element model was established in Abaqus with vertical characteristics of suspension in consideration .Based on the FEM , a tire acoustic BEM was established in Virtual Lab .And the structural vibration noise of the tire was simulated in rolling status .The simulation result indicates that the impact frequency between tread pattern and road is the main noise source of tire sound radiation which was verified through the experiment .