The important action of eigenvector in estimating stability margin is investigated, and the limitation of both system damping and logarithmicdecrement criteria is pointed out.
The natural logarithm of this ratio is called the logarithmicdecrement.
此比率自然对数称为对数的减量。
3
The results show that in traditional aging temperature, the stress relaxation curve of 7050 aluminum alloys exhibits a classical logarithmicdecrement curve.