A study on The Optimization Method of Vibration Level for The New Standard of ISO6954

摘要

ISO6954 was substantially revised in December 2000. The new standard introduces the weight function and, we must evaluate overall value with the amplitude set in weight (Matsumoto, 2000. Sasajima, 1999). So we must use several frequency components. According to the revision of ISO6954, the previous optimization system (Hayashi, 2000) has been revised so that the system can correspond to the new standard. In this case, attention has to be paid to the engine force when has several frequency components and the inertia force of the engine piston and connecting rod. In this study, the relationship between engine revolution and weighted root mean square value has been derived and the peak sensitivity analysis is applied to this relationship. The validity of this sensitivity analysis is verified through comparison of the predicted results with exact solutions. Then, the optimization method for the new standard was reconstructed. In this method, the old and new standards are chosen as objective function and constraint condition. Finally, the validity of this new optimization method was verified by applying this method to a tanker model.