輕卡駕駛室結(jié)構(gòu)特性的綜合仿真分析

高大威,楊　帆,馮金芝

(上海理工大學(xué) 機(jī)械工程學(xué)院,上海　200093)

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輕卡駕駛室結(jié)構(gòu)特性的綜合仿真分析

高大威,楊帆,馮金芝

(上海理工大學(xué) 機(jī)械工程學(xué)院,上海200093)

摘要運(yùn)用MSC Nastran、Ls-Dyna等CAE分析軟件,對輕型卡車駕駛室的結(jié)構(gòu)特性進(jìn)行仿真分析。建立了輕卡駕駛室有限元模型,設(shè)置載荷及邊界條件,對輕卡駕駛室的模態(tài)、靜態(tài)剛度、靜態(tài)強(qiáng)度進(jìn)行分析及評價(jià)。同時(shí),根據(jù)ECE R29安全標(biāo)準(zhǔn)建立輕卡駕駛室耐撞性分析模型,對其進(jìn)行正面擺錘沖擊試驗(yàn),通過選取駕駛員側(cè)的相關(guān)參數(shù)進(jìn)行仿真。仿真結(jié)果表明,駕駛員腿部護(hù)板到座椅墊前端的水平距離大于假人模型大腿厚度,因此,能保證有足夠空間放置假人模型。

關(guān)鍵詞輕型卡車;駕駛室;結(jié)構(gòu)特性;耐撞性

Comprehensive Simulation Analysis of Structural Characteristics of Light Truck Cab

GAO Dawei,YANG Fan,FENG Jinzhi

(School of Mechanical Engineering,University of Shanghai for Science & Technology,Shanghai 200093,China)

AbstractThe comprehensive analysis method for cab structural characteristics of a light truck is investigated with CAE analysis software such as MSC.Nastran and Ls-Dyna.The FEA model of light truck cab is established and the loads and the boundary conditions are set up.Mode,stiffness,strength and crashworthiness characteristics of the cab are analyzed and evaluated systemically.Meanwhile,according to safety standard ECE R29,the model of the crashworthiness analysis of a light truck cab is established to perform the simulation of the positive pendulum impact test.The living space of the passengers in the cab is analyzed and evaluated,referring to alternating the relative data of the side of the driver.Simulation shows that the horizontal distance between the leg protection plate of the driver and the front end of the chair is bigger than the thickness of the thigh of the dummy model,which guarantees the space for the dummy model.

Keywordslight truck;cab;structural characteristics;crashworthiness characteristics

近年來,由卡車引發(fā)的交通事故日益增加,因此提升輕型卡車的結(jié)構(gòu)安全性已成為普遍需求。同時(shí)乘用車市場遠(yuǎn)大于商用車市場,所以對于輕型卡車的研究力度相對不足,缺乏相關(guān)經(jīng)驗(yàn)支持,而有限元仿真分析法能夠有效地評價(jià)車輛在振動(dòng)與噪聲、安全性等方面的性能,是汽車產(chǎn)品前期開發(fā)的重要手段。隨著計(jì)算機(jī)技術(shù)的進(jìn)步,有限元仿真方法取得了長足的發(fā)展[1],已可較好地為輕卡駕駛室結(jié)構(gòu)做出科學(xué)評價(jià),因此能大幅降低車輛研發(fā)費(fèi)用,縮短研發(fā)時(shí)間。本文以某輕卡駕駛室為基礎(chǔ),建立有限元模型,對其模態(tài)、靜態(tài)剛度、靜態(tài)強(qiáng)度以及耐撞性進(jìn)行分析。根據(jù)對輕卡駕駛室的仿真計(jì)算結(jié)果得出結(jié)論,為結(jié)構(gòu)優(yōu)化及安全性能的提高提供了一定的參考[2]。……