| The sports floor is a special floor that can withstand people's high-intensity sports and provide sports protection functions,and is an important part of the gym floor paving facilities.The research on sports flooring in China started late and the foundation is weak,and the research on the mechanical properties,testing methods and testing instruments of sports flooring is relatively lacking.This subject is a joint research between Heilongjiang Institute of Wood Science and Northeast Forestry University,and is responsible for the Heilongjiang Natural Science Foundation project:"Evaluation Mechanism and Structural Design Optimization of Functional Sports Physiology of Sports Floors(Project Number:C201045)."The subject research is based on the theory of sports biomechanics and adopts human motion simulation analysis,algorithm prediction,experimental verification and other methods,and takes the two important load indicators of sports floor impact and rolling as the research object to study the impact of impact load on the human lower limb;according to the impact load experiment and Simulation and simulation methods to optimize the structure parameters of sports floor shock-absorbing pads to improve sports floor impact absorption performance;based on the measurement principle of laser displacement sensor,a sports floor rolling load detection method is proposed;combined with mechanical structure stress analysis and testing standard design requirements,design sports floor comprehensive load Detector.Based on the relevant theory of sports biomechanics,mathematical equations and human body simulation models are established to solve the maximum impact load that can be absorbed by the lower limbs of the human body through their own motion laws during the jumping and falling process;Threshold;provide data support for the optimization of the structural parameters of sports floor cushions according to the obtained threshold range.According to the impact load experiment and simulation data,impact load detection methods and standards,the BP neural network prediction model algorithm and SPSS multiple linear regression equation fitting algorithm are used to construct the relationship between the structure parameters of the cushion and the anti-impact force;application training A good BP neural network prediction model obtains the prediction parameters of the sports floor cushion structure,and takes the volume ratio and the algebra and the minimum of the anti-impact force as the optimization goals to obtain the optimal structure parameters of the cushion,and verifies that the sports floor under this parameter has Good impact absorption rate.Based on the laser displacement ranging technology,combining the laser displacement sensor with the sports floor rolling load detection,a detection method of dual laser displacement sensor,two rows of scanning point arrangement,and two scanning difference measurement is proposed;this detection method is verified by experiments High detection accuracy.Combined with the mechanical structure stress analysis and testing standard design requirements,and based on the research on the sports floor impact and rolling load testing standard methods,the overall structure design and problem solution of the sports floor comprehensive load detector are proposed;the impact dynamic control mechanism and The rolling load operating mechanism performs structural design and finite element statics simulation analysis to verify the rationality,feasibility and safety of the sports floor comprehensive detector design.The subject research provides a new idea for the method of solving the impact load of the lower limbs of the human body,provides a theoretical basis for improving the sports floor sports protection function by optimizing the structure parameters of the shock absorbing pad,provides a new method for improving the accuracy of the sports floor rolling load detection,and promotes the sports The development of floor production and testing technology. |
PDF Full Text Request