本文選題：FSAE賽車 + 車架　； 參考：《浙江工業(yè)大學(xué)》2016年碩士論文

【摘要】：為了鍛煉學(xué)生利用理論知識(shí)研制方程式賽車的能力,本校大學(xué)生組團(tuán)報(bào)名參加了2015年的FSAE賽事。FSAE賽車車架的功用是支承連接賽車各部件,并承受來(lái)自車內(nèi)外的各種載荷,其強(qiáng)度、剛度直接影響到車架的本身承載能力和車架上各零部件的相對(duì)安裝位置,進(jìn)而影響到賽車的操縱穩(wěn)定性,車架的振動(dòng)特性則影響賽車的動(dòng)態(tài)性能。本課題應(yīng)用拓?fù)鋬?yōu)化設(shè)計(jì)技術(shù),設(shè)計(jì)新的車架(簡(jiǎn)稱“新車架”),分析與對(duì)比初始車架(本校賽車隊(duì)根據(jù)大賽要求以及參考優(yōu)秀車隊(duì)設(shè)計(jì)經(jīng)驗(yàn)設(shè)計(jì)出的車架)與新車架結(jié)構(gòu)的強(qiáng)度、剛度,并對(duì)新車架系統(tǒng)進(jìn)行模態(tài)分析,具體研究工作包括:(1)運(yùn)用HyperWorks/OptiStruct模塊,建立車架的拓?fù)鋬?yōu)化模型,對(duì)車架進(jìn)行拓?fù)鋬?yōu)化得到拓?fù)浣Y(jié)構(gòu),再結(jié)合大賽對(duì)車架結(jié)構(gòu)的要求以及車身各部件的裝配要求,設(shè)計(jì)出具體的車架結(jié)構(gòu)。(2)運(yùn)用數(shù)值模擬軟件ANSYS,分別對(duì)初始車架和新車架在滿載行駛時(shí)的彎曲、制動(dòng)和彎扭組合工況條件下進(jìn)行等效靜強(qiáng)度仿真分析,對(duì)賽車車架扭轉(zhuǎn)和彎曲工況分別進(jìn)行扭轉(zhuǎn)和彎曲剛度仿真分析,得出車架在不同工況下的應(yīng)力分布情況以及抗扭和彎曲剛度。分析對(duì)比初始車架與新車架的各項(xiàng)靜力學(xué)性能與質(zhì)量,結(jié)果表明了新車架的靜力學(xué)性能比初始車架優(yōu)越且質(zhì)量更輕,且滿足靜力學(xué)性能要求。(3)對(duì)新車架系統(tǒng)進(jìn)行模態(tài)分析,包括車架自身的自由模態(tài)分析和“懸架-車架”系統(tǒng)、“車架-負(fù)載”系統(tǒng)和“懸架-車架-負(fù)載”系統(tǒng)的模態(tài)分析,綜合分析了車架結(jié)構(gòu)形式、懸架彈簧和車架負(fù)載對(duì)整個(gè)車架系統(tǒng)的動(dòng)態(tài)性能的影響。分析結(jié)果為車架結(jié)構(gòu)的改進(jìn),避免共振提供理論依據(jù)。研究結(jié)果表明了該車架系統(tǒng)能夠避免低階共振,高階局部振動(dòng)不足以引起車架的疲勞破壞,該車架滿足動(dòng)態(tài)性能要求。根據(jù)分析結(jié)果新車架局部結(jié)構(gòu)得以修改并被賽車隊(duì)采用。本校車隊(duì)已前往上海參加了2015年的FSAE賽事,并且最終賽車的設(shè)計(jì)報(bào)告取得了第9名的成績(jī)。
[Abstract]:In order to train students to make use of their theoretical knowledge to develop formula racing cars, our college students organized a regiment to participate in the 2015 FSAE event. The function of the frame is to support and connect the various parts of the car and bear various loads from inside and outside the car. Its strength and stiffness directly affect the bearing capacity of the frame and the relative installation position of the components on the frame, and then affect the handling stability of the car, and the vibration characteristics of the frame affect the dynamic performance of the car. This topic applies the topology optimization design technology, Design a new frame ("new frame" for short), analyze and compare the strength and stiffness of the original frame (the frame designed by our school's racing team according to the requirements of the competition and the design experience of the excellent team) and the new frame structure, And the modal analysis of the new frame system is carried out. The specific research work includes the use of HyperWorks/OptiStruct module to establish the topology optimization model of the frame, and the topology structure of the frame is obtained by topology optimization. Combined with the requirements of the frame structure and the assembly requirements of the various parts of the body, the concrete frame structure is designed. (2) the numerical simulation software ANSYSis is used to bend the initial frame and the new car frame at full load, respectively. The equivalent static strength is simulated and analyzed under the condition of combined braking and bending, and the torsion and bending stiffness of the frame of the racing car are simulated under the torsion and bending conditions, respectively. The stress distribution and torsional and bending stiffness of the frame under different working conditions are obtained. The static performance and quality of the initial frame and the new frame are analyzed and compared. The results show that the static performance of the new frame is superior and lighter than the initial frame, and meets the requirements of static performance. Including the free modal analysis of the frame itself and the modal analysis of the "suspension-frame" system, the "frame-load" system and the "suspension-frame-load" system. The influence of suspension spring and frame load on the dynamic performance of the whole frame system. The results provide a theoretical basis for improving the frame structure and avoiding resonance. The results show that the frame system can avoid the low order resonance and the high order local vibration is not enough to cause fatigue damage of the frame. The frame meets the requirements of dynamic performance. According to the analysis, the local structure of the new frame was modified and adopted by the racing team. The school team has travelled to Shanghai for the 2015 FSAE, and the final design report of the car scored 9th place.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U463.32;U469.696

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