4results about How to "Reduce lateral stiffness" patented technology

The utility model discloses a composite assembled shear wall of arrangement distribution steel bar based on principal stress, its characterized in that, include: wall body and hidden column, wall body inside is provided with oblique direction steel bar, and oblique direction steel bar is along the arrangement of principal stress direction, and the wall body is filled with light thermal -insulated material, and hidden column sets up at the both sides of wall body, and the end of oblique direction steel bar extends out of wall body, and extends into hidden column, and is connected with the pouring of hidden column. The utility model discloses the shear wall can reduce lateral stiffness, improve the thermal -insulating, sound insulation effect.

The invention relates to an underwater structure excitation device, and relates to the field of underwater structure dynamic characteristic excitation and test technology, the underwater structure excitation device comprises an excitation machine, an excitation rope is arranged between the excitation machine and a tested piece, a pre-tightening force adjusting assembly is arranged between the excitation machine and the excitation rope, the excitation rope and the tested piece are oppositely connected, and the pre-tightening force adjusting assembly is arranged between the excitation rope and the tested piece. And a sensor is arranged on the excitation rope. According to the invention, the excitation device is small in transverse rigidity and small in vibration interference; the excitation force and direction are adjustable, and the excitation system is convenient to install.

A multi-direction low-frequency piezoelectric vibration energy collector comprises a base, a flexible beam, an inertial mass body and a piezoelectric plate. The base is of a cylindrical hollow structure; the inertial mass body is located in the center of the base in a static state; the flexible beam is a sheet which is deformable and has a self-recovery trend during deformation, and the width direction of the flexible beam is along the axial direction of the base; the flexible beam is bent along a fold line in the width direction of the flexible beam and is divided into a piezoelectric flexible beam and an elastic connecting beam which are located on the two sides of the bend, and the included angle between the piezoelectric flexible beam and the elastic connecting beam is smaller than 90 degrees. Wherein the elastic connecting beam is connected with the inertial mass body, and the piezoelectric flexible beam is connected with the edge of the base; and the piezoelectric plate is arranged on the surface of the piezoelectric flexible beam. According to the multi-direction low-frequency piezoelectric vibration energy collector, the inherent frequency of the structure is reduced, the collection efficiency of vibration energy is further improved, and therefore multi-direction and low-frequency vibration energy collection is achieved.

The invention discloses a rigidity-adjustable buffer pad for a damping system of a compressor of a new energy commercial vehicle. An upper buffer pad is formed by vulcanizing an upper buffer pad stainless metal framework, a lower wear-resistant layer framework and a rubber body; the lower buffering cushion is formed by vulcanizing a lower buffering cushion stainless metal framework, a lower buffering cushion upper flanging framework and a rubber body, the upper flanging framework is embedded into the rubber body after being vulcanized, outer layer rubber coating is achieved, the product appearance is improved, and the anti-rust capacity of the frameworks is improved. The height size of the central pipe is 3 mm shorter than that of the cushion pads in a natural state after the cushion pads are assembled, the upper cushion pad, the lower cushion pad and the central pipe form a whole after the whole vehicle is assembled and tightened, the rubber body bears certain compression, and the fatigue life of the cushion pads is prolonged. The inner walls of the rubber bodies of the upper buffer cushion and the lower buffer cushion are arranged to be conical surfaces, and a gap of 1mm is formed between the inner walls and the outer circle of the central pipe, so that the central pipe is convenient to assemble, meanwhile, the transverse rigidity of the buffer cushions can be reduced, rigidity matching of a whole compressor vibration reduction system is integrally realized, and the NVH performance of a whole vehicle is improved.