检索结果-南通市图书馆

Test technology research and fatigue damage prediction of a car body based on dynamic simulation load spectrum

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2020年第11期21卷 923-937页

作者： Lu JIA Huan-yun DAI Ye SONG State Key Laboratory of Traction Power Southwest Jiaotong UniversityChengdu 610031China

The dynamic model of a high-speed electric multiple unit(EMU)is established based on the theory of rigid-flexible coupling multi-body system *** on the actual operating conditions of the vehicle,there are a variety of conditions of car body load-time *** assess ineffective amplitude omission,load spectrum extrapolation,and extreme determination through the car body load-time history,and then obtain the car body fatigue load block ***,we perform a fatigue strength test on the whole car body on a car body fatigue test *** is shown that the accelerations of the three directions of the vehicle car body increase with increasing *** the train passes a curve,the lateral acceleration average becomes *** is also an increase in the car body accelerations in three directions when the train goes through a turnout or twisted *** the condition of a failed spring,the vertical acceleration of the car body is obviously ***-yaw damper failure will cause a significant increase in vehicle lateral *** failure of lateral and vertical dampers on the second suspension causes an insignificant acceleration increase in three *** car body acceleration increases the wear-type profile relative to the original profile in various working and speed level conditions a *** influence on the damage of vehicle car body under various working conditions is predicted according to the obtained load spectrum.

关键词： Dynamic model car body Load-time history Fatigue Damage

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Application of Hot Forming High Strength Steel Parts on car body in Side Impact

引用

Chinese Journal of Mechanical Engineering 2010年第2期23卷 252-256页

作者： SUN Hongtu HU Ping MA Ning SHEN Guozhe LIU Bo ZHOU Dinglu State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian 116024 China School of Automotive Engineering Dalian University of Technology Dalian 116024 China Academy of Changan Automotive Engineering Chongqing 401120 China

Lightweight structure is an important method to increase vehicle fuel efficiency. High strength steel is applied for replacing mild steel in automotive structures to decrease thickness of parts for lightweight. However, the lightweight structures must show the improved capability for structural rigidity and crash energy absorption. Advanced high strength steels are attractive materials to achieve higher strength for energy absorption and reduce weight of vehicles. Currently, many research works focus on component level axial crash testing and simulation of high strength steels. However, the effects of high strength steel parts to the impact of auto body are not considered. The goal of this research is to study the application of hot forming high strength steel（HFHSS） in order to evaluate the potential using in vehicle design for lightweight and passive safety. The performance of HFHSS is investigated by using both experimental and analytical techniques. In particular, the focus is on HFHSS which may have potential to enhance the passive safety for lightweight auto body. Automotive components made of HFHSS and general high strength steel（GHSS） are considered in this study. The material characterization of HFHSS is carried out through material experiments. The finite element method, in conjunction with the validated model is used to simulate the side impact of a car with GHSS and HFHSS parts according to China New car Assessment Programme（C-NCAP） crash test. The deformation and acceleration characteristics of car body are analyzed and the injuries of an occupant are calculated. The results from the simulation analyses of HFHSS are compared with those of GHSS. The comparison indicates that the HFHSS parts on car body enhance the passive safety for the lightweight car body in side impact. Parts of HFHSS reduce weight of vehicle through thinner thickness offering higher strength of parts. Passive safety of lightweight car body is improved through reduction of crash defor

关键词： hot forming high strength steel lightweight side impact car body

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fatigue Analysis of car body Structure Based on Transient Response

Fatigue Analysis of Car Body Structure Based on Transient Re...

引用

2016中国汽车工程学会年会暨展览会

作者： Wang Pengbo Changan Auto R＆D Center Changan Automobile Co.Ltd.

ISBN: (纸本)9789811035272;9789811035265

Fatigue simulation is executed for a car *** spectra are collected by real- vehicle test on enhanced road surfaces,and the load history for each intereface point is acquired by using multibody dynamics virtual *** on a finite element model and the mode superposition method,transient response of the car body is *** the stress history is obtained using the modal stress recovery *** S-N method is applied to predict fatigue damage distribution of the full car *** the fatigue analysis,material Haigh diagrams are defined to introduce the mean stress influence and critical cutting plane method is applied to treat the multi-axial *** on the presented numerical scheme,fatigue analysis and structural improvement for the car body can be carried out at the earlier stage of the vehicle development project.

关键词： car body road loading spectra transient response mode superposition method fatigue analysis

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

car body Durability Analysis Based on Modal Superposition Method

Car Body Durability Analysis Based on Modal Superposition Me...

引用

2019中国汽车工程学会年会

作者： Zhang Zichun Wu Changpeng Wu Zhaoming Lei Yanbing Dongfeng Nissan Technical Center

Common car durability developing methods are firstly introduced,and then focus on simulation ***,there are two simulation methods to get structural stress in time-domain:quasi-static method and modal superposition *** former cannot consider structural dynamic response while the latter can do,which is used to calculate car body stress and damage with fatigue *** to comparing results between test and simulation,results of modal superposition method has better consistency with test results than quasi-static method where local modes ***,it is easy to use modal superposition method to search countermeasures without extra software and calculation resources,which has good application prospect.

关键词： car body durability analysis quasi-static method modal superposition method

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Vibra-acoustic Characteristic Matching of Mini-car body Structure and Interior Acoustic Cavity in Low Frequency Range

Vibra-acoustic Characteristic Matching of Mini-car Body Stru...

引用

2012 3rd International Conference on Applied Mechanics and Mechanical Engineering(ICAMME 2012)

作者： Qian Wang Yang Yu Yuanbao Li Shoukui Li Weijuan Zheng College of Automotive Engineering Jilin University R&D CENTER China FAW Co. Ltd.

This paper focused on the interior boom noise of a mini-car when driving at high speeds. Vehicle interior noise rotor drum tests in semi-anechoic room showed that vehicle interior boom noise in narrow frequency band exited near 250 Hz. Structural and acoustic finite element analysis certified the front roof and rear floor coupled with interior acoustic cavity around this frequency, causing acoustic cavity resonance. On the base of sensitivity analysis technology, a structural improvement schemes pasting free damping fin on the front roof and rear floor of mini-car body for vibration and noise reduction was proposed. Finite element Modal analysis of the mini-car body after improving indicated that local modal amplitude of the mini-car body at the front roof and rear floor around 250 Hz was controlled effectively. Mini-car rotating drum test results after improving showed that vehicle interior boom noise was decreased obviously after pasting free damping fin at the front roof and rear floor. The improving schemes and noise reduction effects proposed in this paper were validated.

关键词： car body Sound cavity Finite element Sensitivity analysis Vibra-acoustic match

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Success Story of Market Exploration of New Technology in China

引用

International English Education Research 2016年第4期 2-3页

作者： XI Songshan

Market exploration is always not easy. That of tailored-blank technology in China can not be an exception. After taking over the marketing and sales job of Andritz Soutec products, I spent the first 2 years promoting and pushing just the application of Tailored-blank technology. When the first project came, we unfortunately were confronting tough and ＂asymmetrical＂ competition. Even the management of Andritz Soutec intended to give up. My choice was ＂to still fight＂. After perseverance and great efforts, we finally concluded the first contract in China. As the Chinese saying goes ＂A good beginning is half of the success.＂ In the over 10 years after that, 57 Andritz Soutec Tailored-blank laser welding lines were sold in China market, which represents over 2/3 market share. For me it is one of the most successful stories.

关键词： market exploration tailor-welded blanks (TWB) / tailored-blanks (TB) car body car model OEM

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：