弹出式发动机罩对行人保护的仿真分析.pdf

T?îw›¦¹¥_‡s叶 昕, 房怀庆, 盘朝奉(~ÊvÐÚÐŒYýñÐý,~Ê“~ 212013)K1:综合分析了交通安全事故和行人保护的现状,阐述了基于行人保护的弹出式发动机罩装置的结构特点,并通过 PC-Crash建立汽车以及行人多刚体模型,进行仿真分析并计算相关参数,同时通过对碰撞点分布的研究提出了进一步的改进方法,并在 ANSYSW orkbench中得到验证b通过分析研究,证明了装置的合理性,也为汽车设计工作的展开提供了理论依据和参考方法b1oM:›¦¹;·; PC- Crash;µKísÏms Ë|: U461. 91 ÓDSM’: B ÓcI|: 1006- 0006( 2011) 02- 0044- 05SimulativeAnalysis of BonnetLifter System on Pedestrian ProtectionYeXin, FANGHuai-qing, PAN Chao-feng( School ofAutomotive andTrafficEngineering, JiangsuUniversity, Zhenjiang 212013, China)Abstrac:t Comprehensive analysis of the present situation of traffic accidents and pedestrian protection is provided,and the structural characteristics ofbonnet lifter system are elaborated. The automobile and pedestrianmult-ibodymodels arebuilt based on PC- Crash, w ith the calculation of related parameters in simulation process. At the same time, an improvedmethod is put forward based on the distribution of collision points on hood cover, which is demonstrated through ANSYSW orkbench. The rationality of the device is proved through the analysis, and which can provide a theoretical basis andreferencemethods for practical automobile designingwork.Keywords: Pedestrian protection; Collision; PC- Crash; Finite element analysis1 ß›¦¹^Ú½†ùî5×¥×1Ù5­B,Â…¿ÉÚ¥²•”,9F† Ø7µr¥Â,[KvK¹hl›¦¥],^Ú›R½†ùî¥×1=¸­Bb d9,ÄM†ovÿµ120£¦µ¿¡^ŒYY#,YVØ°¡^ŒYY#¥à è,sAUÍ70%¥›¦ÐÚ¥-†?3·,Âm1îU[1]bm1 ÚЛ¦·Ä¥sƒFig. 1 Distribution ofContactPoint ofPedestrian]H,›¦s¥ø×ñÐÚÎ^áMM1¥,ŒYY#ÏÚ¥ÎsƒÂm2îUb0~60 km /h¥ÚÎS¶ Ú,?3¥Y#ÿ]îµ¦Ú·Y#9”¥96%,î[sÚ›¦¥]V[ö1 InƒBÎuWb Ÿ¥ùî¦ô[#ªMž,ô ›¦¹¥?5,!9¥Â€!! Ÿ4ÚÚ¥½†Ÿ?, V[ In¥Z_ “T„cw[#B×a?îw‹¥ªÄ!9©bm2 Y#ÚÎsƒFig. 2 D istribution ofCollision Speed ofAccident Carlà°ù: 2010-10-15#44#»38 »2ù € ˜Ðj¨{Ú Vo.l 38 No. 22011M4 Tractor& Farm Transporter Apr. , 20112 T?îwÂ¥²sT?îw®“ ýa.Ëa\îaeÅ©†sFî[2],’Ú„›¦?3·(€|1?3·)H,.Ë"žƒB·,.ó eÅECU,Ü eÅsª eÅ\îýT,YV„c“ ýê 7?îw,P?îwªH
6BçÚ,[4@¥? bW[ržÐ V?hl›¦sñ¥"¥,²Âm3îUbm3 T?îwÂ¥ð ØmFig. 3 StructureofBonnet LifterSystemNÂ98#BÕ·.Ë"d[ 3]bÚ?3žë·H,Q‹HW40 ms[=b?î„c õ¤\îa?îw“ ý„.Ëb\îP„cÂáÎ6,„àMî6iKÔP„cªV6ÿ100 mmb\î¥T¨HW‹5~ 30 ms[=,P¦h†¤(?îw-XP„cÂ6ÀKÚÿbM¿ðSÚ˜,·VñÏ1î6¥„c‚Œ4@v¥‹M™ bW,Eçh†·ž„cÂ/¥T—†q,Â?î#ð£ùÂ,V7ªÄ·¥˜,iO·VñÏ,®ƒÂ?îwÂ/¥Aâ½†5l†s?,V7†®›¦å¥ñb®¿¦Ú·Y#Ï,yÁµ†ÊÏh†]64%,h†]^/î›¦µ§¥ö1ðy[4],yNö1InN›¦h†]¥¹T¨b3 ›¦h†sßN#Â¥_‡s3. 1 ›¦h†sßNS¹h†]É› 8ßN,"-S=YȐ¨h†]SHIC (Head Injury Criterion)b¾S¿1971M®Versace4,$ÅS¡^½†T¹FMVSS208[î,,^BÕGSI(GaddSeverity Index)¿É¥h†]ßNS[ 5]b9ØT¹HIC = (t2 - t1) 1t2 - t1 Qt 2t1adt2. 5( 1)TÏ, a¹h†×FÎ,´¹× ïFÎg¥”; t1¹FÎo™¥©iHW; t2¹M¿HICKvH¥HW,Ðt1Wï36ms[=bCòS¥îÚ½†S+¬û^¨HIC= 1 000T¹½†¸K´,N9ʨƒB´T¹›¦h†¹¥ßNS´b3. 2 ¿PC-Crash¥_‡sV20W@70M}[ Ÿ,¦Ì›¦¹5×É›v'Æ¥ùî[’çY#?3¥ðy,[EçY#?3„h›¦/î¥åb¹÷zس‚]Ìâ/›¦¥îÿY‹„åÅ,µA1¾ùî5×Ùsµr¥ùîZE„ý bÛ"9Ø—q„Èq¥ yÎ?Z, Ÿ¹‹¨_‡s¥ZE·Y#É›ùîb¹£N›¦¹¥¿ÉT¨,¨ŒYY#EÈqPC-CrashÉ›_‡sbô ·-ª¥?oš„ÜMîoš,n5PC-CrashÏy ë¦8Ð8˜,iÊ|50äsÊîM30¥¦83 ØЕ”,':8×= 78 kg,&Ú=175 cm,ðò[¦83þ ïЕ” Ÿ1PC-CrashL¦S”  obبÈq¥MultibodyModelv,¨20ñ‡o ŸVU›¦¥haàa£´aÝaªavyalyaa–©òFî†s,i|&8ò†sYV19ño™1« õ¤,Âm4îUbm4 PC-CrashÏ›¦Ð8˜Fig. 4M ult-ibody PedestrianM odel in PC- Crash]H,y ë·Ú¥˜,PC-CrashÚo=Ê|AUDI80Éh˜ŸÚT¹·Ú,|SÚι60 km /h,]H¿vSçlÚ'j,’ç%ç¥† US"oxyz,„ÚM õ¥ÚUS"ocxcyczc[#Äñ}ø¥»ØUS"odxdydzd,iØœ¦Ú¥SÊÂÿ„ÅCÆmb’ç·˜ò•”„ßNSª,YVPC-CrashÏ¥3D w indowÉ›˜¥£。