natural frequency造句
31. The swing is a pendulum with a single natural frequency depending on its length.
32. It is the natural frequency of emission of the hydrogen atoms in space.
33. The mode analysis of liquid-solid coupled system yields the first order natural frequency, vibration shape and the diaphragm amplitude-frequency relationship.
34. Synthesizing modal parameters, such as natural frequency, strain mode and so on, indirect index method of damage detection is presented.
35. The static displacement, the vibration modes and the natural frequency are discussed.
36. The optimal structural parameters of U - type tube are determined based on the lowest natural frequency principle.
37. Both increasing the mass and reducing the support stiffness of the slab can reduce the natural frequency of the FST system to achieve better performance of vibration isolation.
38. Natural frequency of culvert tail rotor of some kind of helicopter with uncertain composites was studied.
39. The natural frequency and sensibility are affected markedly when stiffness changes in low level range.
40. The results also demonstrate that the frequency which is obtained in the experiment by using the extrapolation method is the natural frequency of the metal bar indeed.
41. To study the influence of rotary inertia on gear flowmeter natural frequency, keep damping and leakage coefficient as constant.
42. The aluminum alloy bridge deck designed in chapter four was used for the footbridge, and the stiffness, natural frequency and stability factor is calculated also.
43. In the case of the small angular displacement, the natural frequency of the corresponding undamped linear system is obtained, which is consistent with the experimental observation.
44. The vibration modal in ultrasonic frequency band is extracted and the natural frequency of work modal is determined through analyzing the characteristics of principal mode.
45. Keywords: micro - gyroscope , silicon single crystal, three - axis angular - rate sensing, natural frequency and mode shapes.
46. The test proves that vibration cutting efficiency is high and cutting resistance force is small when the vibration frequency is nearly equal to the natural frequency of cutting material.
47. The transient term is an oscillation of damped natural frequency , of whelloch the amplitude decays according to .
48. The results show that, the natural frequency, dynamic amplification factor and acceleration root of mean square of seat suspension will decrease with the increase of proportional valve input voltage.
49. A nonlinear parametric excitation equation is obtained for ships in longitudinal waves, and the dynamic stability is analyzed when the natural frequency of heave and roll are approximately equal.
50. The natural frequency of the press is far higher than the frequency of inertial force.
51. Natural frequency and dominant mode shape of FGM beams under four kinds of boundary conditions were obtained.
52. Also, with changes in boundary density, the natural frequency would show significant changes ( p 0.05 ).
53. Fatigue life of random vibration can be calculated by the fatigue life of sinusoidal vibration under first natural frequency.
12