Disposable Deep-sea Surface Sediment Sdevelopment Of Mechanical Performance Measuring Devices

As humans gradually attach importance to marine resources,the resources contained in the ocean are gradually entering the public view;countries in the world are actively engaged in the development and utilization of marine resources,and due to the disputes existing in the use of marine resources by various countries,the territorial sea has been aggravated.Regional conflicts.Submarine installation of deep-sea mining equipment;submersibles,submarines,etc.landing in the deep sea;deep-sea torpedoes buried;strengthening China’s control of territorial waters,etc.,need to have a certain understanding of the mechanical properties of deep-sea sediments.The disposable subsea penetration instrument studied in this paper can achieve a rough determination of the mechanical properties of surface sediments in the deep sea and provide the prerequisite guarantee for subsequent detailed data measurements.Firstly,the research and development status of various physical quantity measuring equipments in the mechanical properties of surface sediments in deep sea are described at home and abroad.The development status at home and abroad and the working principle of the determination of shear strength of deep-sea surface sediments and the actual working environment in the deep sea floor are presented.A new type of method for measuring shear strength is designed to design a low-cost,simple-to-use,rapid-detection measurement device,the disposable subsea penetration instrument,which enables the measurement of shear strength in the mechanical properties of deep-sea surface sediments..According to the working principle of the device measurement,the corresponding electronic component module is selected,each module is combined according to the working principle of each module,so that it has a specific test function,and the designed module is welded to become a sensor with a certain working ability.After the design is completed,the sensor can perform the measurement of the acceleration during the movement,the launch of the positioning signal,the information interaction of the Bluetooth module,and the adsorption and release of the electromagnet module.According to the size of the sensor,the buoyancy block system of the disposable subsea penetration instrument and the overall three-dimensional modeling of the main equipment components are completed.The corresponding sealing method is selected according to the actual working conditions to further design the size of the sealing groove,according to the calculation of the pressure component.The calibration formula calculates and analyzes the pressure parts of the design.According to the working principle and process of the equipment movement,the corresponding elements of the design are subjected to corresponding finite element simulation analysis.Solidworks software was used to model the equipment’s buoyancy block system and the disposable subsea penetration apparatus main equipment.Then the force analysis during the installation and work of the O-ring was completed using the Workbench software and the O-ring seal was used.The choice of the ring design the seal groove size,use the finite element analysis software to complete the pressure analysis of the equipment body and the buoyancy block system to ensure that the main body of the equipment and the buoyancy block system can work normally in a deep sea environment with a water depth of 7000 meters.The requirements and sealing effect are good.Using the fluid dynamics analysis software Fluent and the data processing software Matlab under the finite element analysis software,the contact probes of the main equipment of disposable subsea penetration instrument are optimized.The size of the impact head in the lower part of the disposable subsea penetration instrument body is designed as a series of gradient dimensions.The fluid dynamics analysis of the equipment corresponding to the different size contact probes is performed using Fluent software to solve the corresponding seawater resistance values of the different size equipment.The obtained resistance values are processed using Matlab,and the data is processed into a smooth curve by using interpolation method,and the size value of the device corresponding to the minimum resistance value is solved,and the resistance value of the touch probe when moving in water is solved.Compare the calculated resistance value with the previously solved resistance value to ensure that the dimension value is the minimum resistance point.After the design of the electrical components and mechanical structures are processed,experiments are performed.Firstly,the pressure analysis was performed on the electrical components and mechanical equipment to simulate the deep-sea conditions.After the pressure analysis was completed,the laboratory experiments were conducted.Different types of soils were selected to simulate deep-sea surface sediments.The mechanical properties of the soils to be tested were determined using a disposable subsea penetration meter.The mechanical properties of the soils to be tested were measured using a cross-plate shear test method.Comparing the two sets of data,a range of coefficients is obtained,which is the conversion coefficient range of the two measurement methods.