中小型汽车起重机车架结构多学科优化  被引量:7

Multidisciplinary Optimization of Small and Medium Truck-Crane’s Frame

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作  者:曹付义 李金龙 崔梦凯 李豪迪 CAO Fu-yi;LI Jin-long;CUI Meng-kai;LI Hao-di(Vehicle&Traffic Engineering School,Henan University of Science&Technology,He’nan Luoyang471003,China)

机构地区:[1]河南科技大学车辆与交通工程学院,河南洛阳471003

出  处:《机械设计与制造》2020年第3期39-42,共4页Machinery Design & Manufacture

基  金:河南省科技攻关计划资助项目(172102210252)。

摘  要:在Hyperworks软件中建立汽车起重机车架有限元模型,经过静强度和模态分析,其最大应力值大于材料的屈服极限值,经结构改进,车架静强度远小于材料的屈服极限,低阶模态值较低,影响乘坐舒适性。为解决改进后起重机乘坐不舒适性,建立以车架强度、刚度和振动模态等学科的多学科优化设计,采用响应面方法构件各学科结构响应的近似优化模型,最后将响应面近似模型导入ISIGHT优化软件,并用多岛遗传算法对车架进行协同优化。结果表明,车架质量减少129kg;车架的强度和刚度均满足材料要求;振动模态有所提高,达到了起重机工作状态下乘坐舒适性和车架轻量化的目的。The finite element model of truck-crane frame is established in Hyperworks software. Through static strength and modal analysis,the maximum stress value is greater than the yield limit value of the material. The static strength of frame is far less than the yield limit of the material by the improvement of structure,and its low order modal value is low,which affects the riding comfort of the crane. In order to improve the ride comfort of the improved crane,a multidisciplinary optimization design of the frame strength,stiffness and vibration modal was established,and the response surface method is used to approximate the structural response of each subject. Finally,the approximation model of the response surface is imported into the ISIGHT optimization software,and then MIGA is used for collaborative optimization of the frame. The results show that the frame quality is reduced by 129 kg;the strength and stiffness of the frame meet the requirements of the material,and the vibration mode has been improved,which meets the purpose of riding comfort and lightweight frame under crane working condition.

关 键 词:汽车起重机 车架 结构分析 多学科优化 响应面方法 乘坐舒适性 

分 类 号:TH16[机械工程—机械制造及自动化] TH122

 

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