CAJ | 학술논문

通过对某车型前独立悬架副车架横梁开裂的产生原因进行材料力学分析、CAE分析，确定横梁开裂主要原因是断面系数相对过小，本文提出增加断裂处的断面系数、降低断裂处与其四周的应力差值、增大横梁中部应变等方案进行优化。进而对优化后的横梁再进行应力计算和CAE分析，确保优化效果，最后通过应变片检测、试验验证对优化后副车架横梁的应力和可靠性进行再确认，以充分保证该横梁满足整车的可靠性要求。其中的优化方法和思路对类似产品设计和优化具有很好的参考价值。
통과대모차형전독립현가부차가횡량개렬적산생원인진행재료역학분석、CAE분석，학정횡량개렬주요원인시단면계수상대과소，본문제출증가단렬처적단면계수、강저단렬처여기사주적응력차치、증대횡량중부응변등방안진행우화。진이대우화후적횡량재진행응력계산화CAE분석，학보우화효과，최후통과응변편검측、시험험증대우화후부차가횡량적응력화가고성진행재학인，이충분보증해횡량만족정차적가고성요구。기중적우화방법화사로대유사산품설계화우화구유흔호적삼고개치。
Through material mechanical analysis and CAE analysis of the causes of cracking on sub frame cross member of front independent suspension of a certain vehicle type, the paper determines the major cause for cross member cracking is the relatively too small section modulus. It brings forward several optimization schemes accordingly such as increasing the section modulus at the cracks, reducing the difference of the stresses between the cracks and the surroundings, and increasing the strain at the cross member center. It then proposes to re-conduct stress calculation and CAE analysis on the optimized cross member and finally re-confirm with strain gauge test and experimental verification the stress on the optimized sub frame cross member and its reliability, thus fully ensuring the optimization effect and the ability of the cross member to meet the whole-vehicle reliability requirements. The proposed optimization approaches hold great reference values to similar product design and optimization.