Structure design method of carbon fiber composite engine hood

• Main Authors: LI HAIPENG, LIANG CHUNYONG, GE GUANGYUE, LI LELE
• Format: Patent
• Language: Chinese; English
• Published: 20.10.2017
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; MOTOR VEHICLES; PERFORMING OPERATIONS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRAILERS; TRANSPORTING

The invention discloses a structure design method of a carbon fiber composite engine hood. The method comprises the steps of establishing a mathematical model for size optimization of the composite engine hood by taking parameters such as the ply angle, the ply thickness and the thickness of a core material of a carbon fiber composite one-layer ply as the design variables during structure optimization and conducting the calculations: (1) the design target: the objective function for the size optimization design of the composite engine hood is to make the engine hood to be minimum in weight; (2) design variables; (3) design constraints; (4) calculation conditions; and (5) optimizing the analysis result. When compared with that before optimization, the composite engine hood after optimization has a weight decrease of about 16%, and is basically unchanged in various performance parameters, wherein the first-order frequency is increased, the maximum displacements under static conditions are increased, the stiffne