Feature : wide suitability , firm welding spot , easy operation , stable function , safety & stability and so on 特點(diǎn):該機(jī)具有適應(yīng)范圍廣、焊點(diǎn)牢固、操作方便、性能穩(wěn)定、安全可靠等優(yōu)點(diǎn)。
And it could shorten the time to build the body model and ensure the enough accurate rate on engineering . secondly , the methods to deal with the welded spots in this dissertation are used to build the fem model of biw ( body in white ) 然后,將本文對(duì)車(chē)身焊點(diǎn)的處理方法應(yīng)用到白車(chē)身有限元模型的建立中,其有限元模態(tài)分析結(jié)果與樣車(chē)的實(shí)驗(yàn)?zāi)B(tài)分析結(jié)果吻合較好。
If the weld spot size is the same , the welding - parameter both high voltage , short pulse width and low voltage , long pulse width can get the same pws of lh . but the range of influence of thermal stress by long pulse is larger than by high voltage 在光斑尺寸相同的條件下,高電壓小脈寬和低電壓大脈寬可以使激光錘校正偏移達(dá)到相同的效果,但是高電壓小脈寬的焊接參數(shù)比低電壓大脈寬的焊接參數(shù)對(duì)材料的熱應(yīng)力影響區(qū)要小。
Firstly , the fem is applied to study the typical connecting means - welded spots on the car body that has great influence on the correctness rate of the fem model in the dissertation . combing the experiment modal of the typical metal sheet , five models used to replace the welded spots are discussed 首先,論文利用有限元法對(duì)影響車(chē)身有限元模型準(zhǔn)確度的典型連接方式?焊點(diǎn)進(jìn)行研究,結(jié)合典型焊接金屬板件的試驗(yàn)?zāi)B(tài),探討了五類(lèi)焊點(diǎn)有限元模型的模擬精度。
The fem ( finite element method ) offers an advanced method for the analysis and design of vehicles . during the initial stages of design the fem analysis of vehicles could help engineers find the problem that exist in the design . nevertheless , during the process of the fem analysis of vehicles , the technologies of building the typical connecting means - welded spots on the car body is the key technology to ensure the correctness and the higher accurate rate of the fem model analysis results 有限元法為車(chē)身結(jié)構(gòu)設(shè)計(jì)提供了先進(jìn)的手段,在設(shè)計(jì)初期對(duì)車(chē)身進(jìn)行有限元計(jì)算,可以找出設(shè)計(jì)中存在的問(wèn)題,但是在應(yīng)用有限元法進(jìn)行車(chē)身結(jié)構(gòu)分析計(jì)算的過(guò)程中,車(chē)身典型連接件?焊點(diǎn)的有限元模型建模技術(shù)是保證計(jì)算結(jié)果正確并有較高精度的關(guān)鍵技術(shù)。