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2016中国汽车工程学会年会暨展览会

作者： Sun Zhendong Yan Lei China Automotive Technology & Research Center FAW-Volkswagen Automotive Co. Ltd.

Rear- end crash is one of the important types of road traffic accidents with the characteristics of heavy *** the accidents,it has caused greater casualties and higher mortality in the passenger car crash into truck *** to the analysis of lots of traffic accidents,it’ s found that the truck rear under- run protection device has good protective effect and can reduce casualties in this kind of *** the analysis based on actual accidents data is able to provide real foundation for improving the rear under- run protection *** this paper will,on the basis of actual accidents data,study on the determination method of the target value of prevention of truck rear under-run protection *** order to carry out research on the basis of actual traffic accidents data,a large number of traffic accident cases has been collected and in- depth accident investigation has been *** order to study a method on the target value of prevention of truck rear under- run protection device,some accidents has been appropriately chosen as data samples of road traffic *** cumulative probability distribution was introduced into the *** analysis and deduction,the cumulative probability function of impact force has been established,and the characteristic point matrix of impact force has been determined,and the determination method of the target value of prevention has been finally found *** function concluded by this method will introduce the weight of truck and the target probability of prevention so as to obtain the target value of *** method can provide support for the optimization of rear under- run protection *** paper further focuses on method exploration of the automotive safety technology as well as the vehicle standard key parameters on the basis of actual traffic accidents data,so it can also provide reference for other key parameters to be studied.

关键词： truck passenger car rear under-run protection device prevention target value

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Research on optimization and design methods for air distribution system based on target values

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Building Simulation 2021年第3期14卷 721-735页

作者： Ran Gao Hengchun Zhang Angui Li Shihao Wen Wuyi Du Baoshun Deng School of Building Services Science and Engineering Xi'an University of Architecture and TechnologyXi'an 710055China School of Thermal Engineering Shandong Jianzhu UniversityJinan 250101ShandongChina China Railway First Survey&Design Institute Group Xi'an 710043China

To achieve sufficient air conditioning of large buildings,reasonable air distribution in indoor spaces is an effective method for creating stratified air ***,optimizing the air distribution in large buildings is extremely *** this paper,we expound on a new method for air distribution design and optimization based on target value evaluation and summarize the relevant design processes based on an orthogonal test and by decoupling the effects of the size of the tuyere,airflow temperature,air-supply angle and velocity on air ***,we present a design *** optimize the distribution of a lateral air supply in winter,the deflection angle,velocity and temperature of the air supply can be determined in *** the large and tall building types addressed in this paper,the optimal air-supply angle is 2°,the optimal air-supply velocity is 8 m/s,and the optimal air-supply temperature is 19℃.

关键词： air distribution target value indicator optimization

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