Body Torsional Stiffness - Validation & Design Optimization
Typ
Examensarbete för masterexamen
Program
Applied mechanics (MPAME), MSc
Publicerad
2019
Författare
Ranga Ramanujam, Krishna Desigan
Seshanna, Nitish Malangi
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
This Thesis is a validation work, wherein, the body torsional stiffness calculated from a test-rig experiment is validated against the simulations. Earlier, the body torsional stiffness was calculated in the test-rig using a Body-In-Gray (BIG) structure (see section 2.2) and this method correlated exactly with the CAE simulation method. Hence, this test-rig experiment method was stopped and the simulations were enough
for evaluating the body torsional stiffness. Later, a new test-rig experiment method (current method) was introduced, in which a full-scale car model is used to evaluate the body torsional stiffness. This method was introduced mainly to measure and compare the body torsional stiffness of the competitors’ models. As this method did not correlate well with the CAE simulation, the impact of the Chassis on the BIG model is investigated. This is done to get a better correlation of the results between the simulation and the test-rig experiment. Also, to evaluate the body torsional stiffness similar to that of the test-rig method, a new simulation method is introduced during the thesis. Finally, the results from both the simulations are
compared against the test-rig method to recommend the best simulation method for validating the test-rig experiment. As a second part of the thesis, a Design Optimization study is performed to reduce
the weight of the BIG structure with no change in the body torsional stiffness.
Beskrivning
Ämne/nyckelord
validation , body torsional stiffness , correlation , test-rig experiment , optimization , reduced mass