Shock attenuation through bolted joints
Web31 Jul 2024 · In many applications, where a bolted joint connects a sensitive component to the rest of a structure, it is important to interpret shock propagation through the bolted … Webexcept at the charge point or line. In general, joints and bolted connections representing structure discontinuities tend to greatly attenuate the pyroshock amplitudes. With regard …
Shock attenuation through bolted joints
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Webb. Experimentally estimate the materiel's fragility level in relation to pyroshock in order that shock mitigation procedures may be employed to protect the materiel’s structural and … Webactivity joint riser shock attenuation Prior art date 2024-08-25 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis …
Web1 Jun 2007 · The purpose of this study is to demonstrate that it is necessary to keep in account the damping effect due to bolted and riveted joints to analyse the dynamics of structures subjected to pyrotechnic shock, and that numerical analyses using the finite elements method are able to provide sufficiently accurate results even on structures … WebBolt pre-tightening force is one of the key parameters affecting contact stiffness. Attenuation of the pre-tightening force due to vibration and other factors will di rectly …
Web1 Jun 2007 · The shock-absorbing insert reduced propagating shock for the joint structure, and the shock response of the mounted equipment was significantly attenuated. The … Web1 Mar 1993 · Bolted joints have multiple nonlinearities such as friction, contact stiffness, and impact loading. Joint models are typically complex and computationally expensive. These problems become even more challenging when the bolted joint is …
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Web2 Oct 2024 · First, the microscopic contact mechanism of the bolted joint surface was revealed, and then a joint contact load and contact stiffness model based on Hertz … dishes that don\u0027t scratchWeb31 Jul 2024 · Base on the spectral formation , the response of bolted flange joints contained three physical phenomena, forced vibration, structural vibration, and shock response, and can be expressed as follows: where T d is the duration of excitation, T n is the natural period, T S is the period of the shockwave in the flange, and ω corresponds to the radical … dishes that fit in dishwasherWeb29 May 2012 · In an embodiment of the invention, a separation system includes shock attenuation features formed as an integral part of the joint structure. Shock attenuation is achieved through use of, for example, slots or grooves that are machined directly, or otherwise formed integrally, into the separation system structure. dishes that contain lactoseWebJoint attenuation is highly dependent on the ratio of the joint bending stiffness to that of the beam or primary structure. The frequency content of the incident energy is another … dishes that do not get hot in microwaveWeb26 Apr 2007 · Bolted joints take on vibrations and shock. Almost any fastened joint will fail if subjected to strong enough vibrations for a long enough time. A new approach, the … dishes that feed a crowdWeb3. Research on Influencing Factors of Loosening. The sinusoidal excitation used in this test was as follows: where is the displacement amplitude (mm) and is the vibration frequency (Hz). The displacement amplitude was kept constant. The maximum velocity excitation and maximum acceleration excitation would be changed through changing the frequency . … dishes that go with chiliWeb4 Oct 2024 · Maintaining preload in bolted joints is critical for the safe and efficient operation of nearly all built-up structures. Dynamic loss of preload during operation occurs when sufficient shear force is applied to the joint such that slip is induced in at least the threads if not the entire bolt. dishes that go with brisket