3、llwaterplaneareatwinhullbyadoptingensembleofmetamodelsSHU Le-shi1, HU Pian2, LIU Cong-wei2, ZHOU Tao-tao2, XU Hui2, JIANG Ping1(1. School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. China Ship Development and Design Center, Wuhan 43006
4、3, China)Abstract: Predicting the structural stress of small waterplane area twin hull (SWATH) is of great significance toensure the safety of navigation when the ship is impacted by the waves. The numerical calculation of stress by finite elementsoftware can be very time-consuming. Building the met
5、amodel becomes an effective way to solve this problem. Because ofthe limitation of sample size, a improper metamodel may cause low metamodel accuracy. Ensemble of metamodels (EMs)can avoid the disadvantage of single metamodel. EMs is applied to predict the the structural stress of SWATH and compared
6、with single-fidelity metamodel for metamodel accuracy. The results indicate that the EMs can ensure the metamodelaccuracy.Keywords: small waterplane area twin hull;single-fidelity metamodel;ensemble of metamodels;stressprediction;metamodel accuracy0 引 言设计选取样本点并建立Kriging模型用于型线优化设计,有效降低了潜器阻力。常海超等[
7、4]将Kriging模型小水线面双体船(small waterplane area twin hull,应用于船型优化,并验证其实用性和有效性。苟鹏等[5]SWATH)是一种综合性能优良的船型,其应用前景广将Kriging模型应用于深潜器多球交接耐压壳的结构优阔。由于小水线面双体船设计变量较多,变量间交互化中。影响较为敏感,在其设计过程中需要采用仿真方法以以上学者研究了单一近似模型在船舶工程中的应