Static Topological Optimization Design Of The Commercial Vehicles’ Cab Under Full Truck

With the vigorous development of the automotive industry, led to the development ofheavy commercial vehicles, the cab is an important part of the commercial vehicle, the cabprovides comfort and protection for the driver. But the most heavy commercial vehicles’ cab,there is a great deal of vibration and noise problems, so that not only affect the accuracy andjudgment of the driver’s operation, but it will also affect the durability and tightness of thecab, likely to cause the cab destruction, so as to improve the performance of the cab is verynecessary. There are significant differences in the optimization analysis of the cab under thefull truck and of separate studies cab structure optimization analysis. This paper studies thenew method of the cab static topology optimization about the cab under full truck.Topology optimization is a relatively new field. Although topology optimization theoryhas been launched hundred years ago, has not been rapid progress. There are manywell-known scholars at domestic and abroad to join this field, development and expansion ofthis field is speeding, so the topology optimization theory is applied to the car structuredesign is imperative. Access to large amounts of documents, this paper studies the new cabunder full truck static topology optimization method. Based on the finite element andsensitivity analysis, put forward the concept of static modal stiffness sensitivity and theprinciple of screening design variables, and use generalized inverse iteration method todesign the cab under full truck, it includes weight savings and increased rigidity design.Creating a finite element model of the vehicle by use of the Hyperworks software. Thevehicle is divided into the cab, the cab support spring, suspension spring, frame, and cargocompartment. Finite element model each of these five parts is established, the shell elementsare used to simulate the most of the components of the vehicle. Components had no effect tothe finite element analysis of vehicle simplify into a quality unit. RBE2units are used tosimulate the connections between components. Discussed in torsion and bending conditions,to determine the appropriate load conditions and constraints, static finite element analysis ofa separate cab, cab+support spring combination system, the cab under full truck, and the cabinstall door. By calculating the static modal stiffness sensitivity, filter out the master parts as design variables.This paper proposed the new method about the cab under full truck static topologyoptimization, the cab quality lightest as the objective function, static torsion, bending modalstiffness of the cab under full truck as the constraints, by the generalizedinverse iterationmethod to obtain the optimal design. The static analysis of the optimized structure, verify thefeasibility and effectiveness of the new method of cab under full truck static topologyoptimization.