7 results about "Beam vibration" patented technology

A modular intelligent pipe support, belonging to the field of pipeline vibration control, includes a support body, sensors, a vibration signal acquisition, analysis, and alarm module, and a dynamic vibration absorption module. This invention is geared towards practical engineering applications. While retaining the boundary constraints and vibration control functions of existing pipe supports, it adds a modular device that integrates dynamic vibration absorption, energy harvesting, vibration monitoring, anomaly alarms, and wireless communication functions. This solves the problems of existing pipe supports having limited functionality, being unable to effectively handle pipeline spectrum vibrations, and requiring significant manpower and resources for routine safety inspections. Its core technology lies in utilizing a cantilever beam-mass block structure to provide targeted dynamic vibration absorption reaction force, effectively controlling pipeline spectrum vibrations; using piezoelectric materials to convert the mechanical energy generated during the cantilever beam vibration process into electrical energy, thereby powering the online monitoring module; and using sensors to collect the support vibration signals in real time, thus realizing the monitoring and analysis of support vibrations.

This application relates to a wooden main structure, belonging to the field of wooden building technology. It includes a supporting plane positioned between two walls. The supporting plane includes supporting beams, connecting beams, and inclined beams. Several supporting beams are erected between the two walls, and several connectors are evenly and fixedly installed on each supporting beam. Several connecting beams are vertically arranged between adjacent supporting beams, with their ends fixed to the connectors. Several inclined beams are inclinedly arranged between adjacent supporting beams, with their ends fixed to the connectors. A damping pile is fixedly installed at the bottom of each connector, and damping rods are installed between adjacent damping piles. The damping rods are arranged along both the length and width of the supporting plane. This application has the effect of reducing excessive load concentration and beam vibration when a wooden building supports a unidirectional inclined plane, thereby improving its load-bearing capacity and seismic resistance.

This invention discloses an optimized design and intensity noise suppression method for a fiber optic cantilever beam vibration accelerometer with an inclined end face, belonging to the field of fiber optic sensing and vibration measurement technology. It includes sensor optimization design steps and intensity noise suppression steps. In the optimization design step, an analytical relationship model between the optical power transmission coefficient and the input acceleration is established in the main sensing axis direction and the transverse direction. Based on a given acceleration range and key structural parameter range, the influence curves of key structural parameters on key performance parameters are simulated, thereby determining the accelerometer structure. In the intensity noise suppression step, noise suppression is achieved by normalizing the DC component of the vibration acceleration signal of the designed sensor using a noise reduction method based on the DC component normalization of the same optical path. This invention simultaneously achieves high sensitivity, low nonlinearity, and low transverse sensitivity ratio accelerometer design and noise suppression, improving the accuracy and stability of acceleration measurement in complex environments.

This invention provides a method and system for identifying vibration modes of a ship's hull beam based on a wireless mesh network. The method includes: acquiring vibration acceleration signals from multiple measuring points on the hull beam during a preset navigation period; the multiple measuring points are uniformly distributed along the ship's length and symmetrically arranged on both port and starboard sides, and the vibration acceleration signals from these points are obtained through distributed synchronous measurement based on a wireless mesh network; determining the vibration velocity signal corresponding to each measuring point based on the vibration acceleration signals from the multiple measuring points; extracting features from the vibration velocity signal corresponding to each measuring point to determine the velocity spectrum corresponding to each measuring point; and identifying the vibration modes of the hull beam based on the velocity spectrum corresponding to each measuring point and a vibration frequency consistency algorithm to determine the target vibration mode of the hull beam at a target vibration frequency. The solution provided by this invention can achieve convenient, reliable, and high-precision vibration measurement and modal identification of ship's hull beams.

This application relates to the field of vibration reduction technology, specifically disclosing a cosine beam vibration damping clamp and a vibration absorption device. The vibration damping clamp includes an inner ring, an outer ring, and multiple annular cosine beams coaxially disposed therebetween. Each annular cosine beam has a different radial dimension, the same number of cosine periods, and is arranged in a staggered manner. They are connected at the crests and troughs by interlayer connectors to form an all-metal elastic energy dissipation structure. The vibration absorption device includes a support fixed to the outer ring of the clamp, on which an acoustic black hole vibration absorption unit composed of a helical black hole beam and an additional mass is integrated. This application uses a pure metal cosine beam configuration instead of rubber, which has the characteristics of high temperature resistance, radiation resistance, and small deformation under large loads. It can achieve quasi-zero stiffness vibration reduction and compression-shear coupling energy dissipation. By utilizing the helical black hole beam to expand the characteristic size in a limited space, the vibration absorption frequency is pushed to below 50Hz. Furthermore, by flexibly tuning the bandgap through replaceable additional masses, the low-frequency line spectrum control capability and engineering versatility are significantly improved.

This invention discloses a piezoelectric energy recovery device and control method for ship bearings. A piezoelectric cantilever beam vibration energy harvesting device (6) is fixed on the lower surface of the outer ring of the bearing (4). A GAM-DRCN monitoring system (9) incorporates a GAM-DRCN model, which includes a sequentially connected Gram angle difference field conversion layer, an MSS multi-scale denoising module, a CBAM attention module, and an FEM feature enhancement module. The MSS multi-scale denoising module adopts a Res2NeXt structure combined with SE channel attention and a soft threshold denoising mechanism. The system is configured to receive vibration signals collected by sensors and output the voltage prediction results of the piezoelectric device. This invention can adapt to passive monitoring scenarios in actual ship navigation, as well as real-world scenarios where vibration signals are affected by multiple factors such as marine environmental noise and equipment coupling interference during actual ship navigation. It is suitable for rapid processing and monitoring of noisy signals in scenarios with low computational load and small sample size.