Wave in shallow water produced by a travelling model is observed at Mach numbers up to 11.
The characteristics of wave patterns taken by photographs are in good accordance with the results derived from the linear theory of surface wave.

抄録全体を表示

It is known that the mean and standard deviation for the life of a structure are lower than those for either of the components when the lives of the components follow the same normal distribution.
In this paper the author studies the relations between the life of a structure and those of its components in severl typical cases when the latter follow different normal or logarithmic normal distributions.
Analysis has been performed theoretically and by experiments, using random normal numbers, and the results obtained are summarized in several charts. In most cases considered, the life of the structure has been found to follow a normal or logarithmic normal distribution approximately.
Finally it is shown with two examples that the obtained results will be successfully applied to more practical and complicated problems than those treated in the present paper.

抄録全体を表示