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CN-122016236-A - Non-uniform wave-making equipment based on bidirectional cam groove and arc plate

CN122016236ACN 122016236 ACN122016236 ACN 122016236ACN-122016236-A

Abstract

The invention discloses non-uniform wave-making equipment based on a bidirectional cam groove and an arc-shaped plate, and belongs to the technical field of wave simulation. The device comprises a wave-making water tank and a wave-making device, wherein the wave-making device comprises an arc-shaped wave-making plate and a driving system, the driving system adopts a bidirectional grooved cam-double crank sliding block compound mechanism, and uniform rotation of a motor is directly converted into non-uniform rectangular linear reciprocating motion of the wave-making plate through a double cam groove with a specific asymmetric profile, so that the dynamic rhythm of natural wave 'fast rise and slow fall' is accurately simulated. Meanwhile, the arc wave-making plate effectively reduces water resistance and energy loss. The invention solves the problems of single motion characteristic, waveform distortion and low efficiency of the traditional push plate wave generator, can generate test waves with dynamic reality and high wave surface quality, and remarkably improves the simulation degree and reliability of a physical model test.

Inventors

  • LI HAO
  • Jiang Ruoyang
  • CHEN LIN
  • CHEN JUNHUA
  • JIANG CHUHUA
  • MIAO BINGYI

Assignees

  • 宁波大学科学技术学院

Dates

Publication Date
20260512
Application Date
20260307

Claims (10)

  1. 1. Non-uniform velocity wave-making equipment based on two-way cam groove and arc, including the wave-making basin, its characterized in that still includes: the wave generating device comprises a driving system and a wave generating plate; The driving system comprises a bidirectional grooved cam-double crank slide block composite mechanism, and the bidirectional grooved cam-double crank slide block composite mechanism converts the rotation motion of a motor into non-uniform rectangular linear reciprocating motion of the wave-making plate; The wave-making plate is an arc-shaped plate.
  2. 2. The apparatus of claim 1, wherein the bi-directional grooved cam-dual crank block compound mechanism comprises: A mounting frame; A bidirectional grooved cam mechanism rotatably arranged on the mounting frame and provided with a rotation axis, a first cam groove and a second cam groove which are positioned on two sides of the rotation axis and have different outlines; the first section of the first hinged sectional crank and the mounting frame form a first linear moving pair perpendicular to the wave-making direction through the first guiding mechanism, and the end part of the first section of the first hinged sectional crank is provided with a first roller matched with the first cam groove; The second motion chain comprises a second hinged segmented crank and a second guide mechanism, wherein a third section of the second hinged segmented crank and the mounting frame form a second linear moving pair parallel to the wave-making direction through the second guide mechanism, and the end part of the third section of the second hinged segmented crank is provided with a second roller matched with the second cam groove; The cross chute connecting rod is provided with a first chute and a second chute which are perpendicular to each other, the first driving pin shaft is arranged in the first chute in a sliding manner, and the second driving pin shaft is arranged in the second chute in a sliding manner; The double-shaft linear motion unit is arranged on the mounting frame, is connected with the cross chute connecting rod and is used for restraining the cross chute connecting rod to move only in a two-dimensional plane parallel to and perpendicular to the wave-making direction; wherein, the cross chute connecting rod is in transmission connection with the wave-making plate.
  3. 3. The apparatus of claim 2, wherein two sets of independent bidirectional grooved cam-double crank slide composite mechanisms are symmetrically arranged on two sides of the back of the wave-making plate, and cross chute connecting rods of the two sets of composite mechanisms are rigidly connected with the wave-making plate through respective connecting arm assemblies.
  4. 4. The apparatus of claim 2, wherein the profiles of the first and second cam grooves are designed according to a target non-uniform motion law so that when the bi-directional grooved cam mechanism rotates at a uniform speed, the wave-making plate is driven to produce a dynamic reciprocating motion of 'accelerating heave, decelerating fallback'.
  5. 5. The apparatus according to any one of claims 1-4, wherein the arc angle of the arcuate plate is 7-8 degrees, the radius of curvature of which is adaptively designed according to the profile of the target wave.
  6. 6. The apparatus of any one of claims 2-4, wherein the first and second guide mechanisms are linear guide pairs or guide bar slider pairs.
  7. 7. The apparatus of any one of claims 2-4, wherein the dual-axis linear motion unit comprises a base axis guide rail slider pair and a stacked axis guide rail slider pair, the guide direction of the base axis guide rail slider pair is parallel to the wave-making direction, the guide direction of the stacked axis guide rail slider pair is perpendicular to the wave-making direction, and the cross chute connecting rod is fixed on the slider of the stacked axis guide rail slider pair.
  8. 8. The apparatus of claim 2, wherein the connection of the connection arm assembly to the wave-making plate is provided with an elastic buffer or a spherical hinge.
  9. 9. The apparatus of claim 1, further comprising a circulating water system comprising a motor impeller assembly and a split divider disposed within the wave-making tank, the split divider dividing the interior of the tank into an upper flow channel and a lower flow channel disposed in parallel, the wave-making plate disposed in the upper flow channel.
  10. 10. The apparatus of claim 1 or 9, wherein the motor of the drive system is a servo motor.

Description

Non-uniform wave-making equipment based on bidirectional cam groove and arc plate Technical Field The invention relates to the technical field of wave simulation, in particular to high-simulation wave generating equipment for scenes such as ocean engineering experiments, port channel research, aquatic ecological simulation and the like, and particularly relates to a mechanical wave generating device capable of accurately simulating the non-uniform motion characteristics of natural waves. Background In the fields of ocean engineering, water conservancy science and technology and related experimental research, physical model tests are important means for researching interaction of waves and structures. The performance of the wave generator, which is used as core equipment for generating test waves, directly determines the accuracy and reliability of the test. At present, common wave generators are mainly divided into push plate type, piston type, pneumatic type, hydraulic type and the like according to driving modes, wherein the push plate type wave generator driven by machinery is widely applied due to relatively simple structure and direct control. The existing mechanical push plate wave generator mostly adopts a classical crank-link mechanism or a gear-rack mechanism as a motion conversion mechanism. The crank connecting rod mechanism has simple structure, but when the rotary motion is converted into linear motion, the motion track of the push plate is approximately sinusoidal and is not an ideal straight line, and the problems of unstable motion and large impact exist near the dead point position, so that the front edge of the generated wave is steep, the rear edge is trailing, and the waveform distortion is serious. Although the gear rack mechanism can realize accurate linear transmission, the requirements on manufacturing and installation precision are extremely high, the tooth surface is easy to wear, pitting and even tooth breakage under the wet and high-load reciprocating motion working condition for a long time, the maintenance cost is high, and vibration and noise are easy to generate during high-frequency operation. More importantly, the motion of the wave-making plate driven by the crank connecting rod or the gear rack is usually uniform or nearly uniform linear reciprocating motion. The motion of water particles and fluctuation of wave surfaces of real waves in the nature have obvious non-uniform characteristics, namely the rising phase (wave rising) of the wave surfaces is usually faster, the falling phase (falling) is relatively slower, and the dynamic rhythm cannot be reproduced by uniform motion. Therefore, the waves generated by the existing equipment have fundamental defects in dynamic similarity, and the modern test requirements for increasingly high wave refinement simulation requirements are difficult to meet. In addition, most of the traditional wave plates are of planar structures. In the water pushing process, the plane plate has large contact surface with the water body and direct action, so that larger wave making resistance and wave breaking phenomenon are easy to generate, the energy transfer efficiency is low, and strong vortex is easy to form behind the plate to interfere with a flow field. This results in a broken wave surface, a fast energy decay, a difficult formation of smooth, stable propulsion waves, especially for simulating the profile of deep water waves. In summary, the wave generating apparatus in the prior art has significant drawbacks in terms of stability and accuracy of motion conversion, dynamic reality of wave generation, and energy transfer efficiency. The research and development of wave-making equipment capable of realizing non-uniform precise linear driving and performing better interaction with a water body has become an urgent need for improving the simulation degree of a wave physical model test. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides non-uniform wave-making equipment based on a bidirectional cam groove and an arc plate. The device directly converts uniform rotation into non-uniform linear motion which can be accurately planned through an innovative composite transmission mechanism, and can efficiently and stably generate non-uniform waves with highly simulated natural dynamic characteristics by combining with an arc wave-making plate with optimal design. In order to achieve the above purpose, the invention adopts the following technical scheme: A non-uniform wave-making device based on a bidirectional cam groove and an arc plate mainly comprises a wave-making water tank, a wave-making device and an optional circulating water system. The wave-making device is a core improvement part and comprises a driving system and a wave-making plate. The driving system creatively adopts a bidirectional grooved cam-double crank slider composite mechanism. The core of the mechanism is a cam plate with a special