VARIABLE RESONANT FREQUENCY SPRING-MASS SYSTEM DEVICEdoi:US3489161 ARexford, Donald LUS3489161 * 1968年7月30日 1970年1月13日 Gen Electric Variable resonant frequency spring-mass system deviceUS3489161 * Jul 30, 1968 Jan 13, 1970 Gen Electric Variable resonant frequency spring-mass system device...
is directly proportional to its displacement as shown in the following equation:a=ωo2xwhere a is acceleration experienced by the proof mass, x is its displacement and ωo is resonant frequency of the proof mass given byωo2=kmwhere k is its mechanical spring constant and m is its mass. ...
Resonance is a phenomenon in which an external force or a vibrating system forces another system around it to vibrate with greater amplitude at a specified frequency of operation.
to find a resonance frequency of a spring. "π" is a long number, but for calculation purposes, it can be rounded down to 3.14. The letter "m" stands for the mass of the spring, whereas "k" represents the spring constant, which can be given in a problem. ...
When a mechanical or acoustical system is acted upon by an external periodic driving force whose frequency equals a natural free oscillation frequency of the system, the amplitude of oscillation becomes large and the system is said to be in a state of resonance. A knowledge of both the resonanc...
The reduction in fluid equivalent mass causes the excitation frequency to deviate from the natural frequency of the multi-DOF acoustic resonant system, thus significantly reducing the dynamic response of the coupled system. Furthermore, the fluctuation of the fluid equivalent mass induces a quasi-...
For positive values of α, the effective modulus reduces to the elastic modulus of the elastic spring at zero frequency K~(ω=0)=K. The mechanical response of the generalized dashpot (σd=K(−iωτ)αε) is purely elastic when α=0, and purely viscous when α=1. The generalized fr...
This paper deals with the most important characteristics of a generic bidimensional dissipative system, subject to a small external excitation in resonance or in quasi-resonance with the primary resonance frequency of the system. In particular, the appearance of limit cycles and bifurcations is consider...
under the first resonant mode has been reported18; however, when the coupling beam is combined in the resonant structure, the second mode is usually selected as the working mode, and the relationship between the inner stress of the resonant beam and the working mode frequency needs to be ...
It is found that resonance-type and Bragg-type band gaps coexist in the LR plate, and the bandwidth of these gaps can be dramatically affected by the resonant frequency of local resonators. In particular, a super-wide pseudo-directional gap can be formed by a combination of the resonance ...