Dynamic analysis of nonlocal-gradient elastic nano-beams resting on an elastic foundation is investigated in this paper. The nonlocal-gradient elastic beam model, which has two independent gradient coefficients, based on the classical nonlocal elasticity theory and strain gradient theory, can be interpreted...

In this article, the process model of an active vibration isolator including the secondary path and the primary path are developed based on state space theory and NR-LMS identification method. The frequency response functions from the identified model and the experiment are compared, The results indicate...

A energy-absorber device with gravity pendulum of car seat headrest is introduced in this paper, and has a analysis at the dynamic characteristics of headrest by use the method of three component-force detection. A force measuring system from the three component-force detection is brought up to reseach...

the design of signal conditioning circuit module is mainly used for weak signal sensor noise amplification and regulation, the module uses LM386 integrated audio amplifier for signal preamplifier, using precision rectifier converts the amplified signal to the DC output, at the same time using differential...

Due to imperfect water entry, a high speed supercavitating vehicle, while moving in the forward direction, rotatesinside the cavity. This rotation leads to a series of impacts between the vehicle body and the cavity wall. The impacts affect the trajectory as well as the stability of motion of the vehicle....

The post porcelain insulator is pulled by bus, which will produce stress in post porcelain insulator, and stress concentration is in the root of the umbrella. Therefore, there will be break accident if it is not installed properly. Firstly, the fracture theory of porcelain insulator is summarized from...

Eulerian-Eulerian two-phase flow model was used to calculat the rheological properties of foam fracturing fluid. In the model, the foam fluid is treated as pseudoplastic fluid. And the calculation results of the model show that the non-Newtonian behavior of foam fracturing fluid is determined by the...

According to the characteristics of the corresponding rigid points in the actual force signal, the background and characteristics of signal analysis are described in this paper for the purpose of obtaining this feature point and the extraction and calculation of the moment of the force signal is realized,...

According to the characteristics of the corresponding rigid points in the actual force signal, the background and characteristics of signal analysis are described in this paper for the purpose of obtaining this feature point and the extraction and calculation of the moment of the force signal is realized,...

in this paper, the simulation method based on AMESim for the common fault of hydraulic system is discussed, two most basic fault simulation methods are summarized, namely parameter setting method and additional element method, and the detailed analysis of each method is given. At last these two methods...

This paper carries out a research to analyze system transient response and its effect on sound speed measurement based on two frequency continuous wave (TFCW). Because the bandwidth of an actual measurement system is limited, the received signal is generally polluted by a system transient response, and...

Based on the molecular motion and collision law of the gas in the aerostatic guide way of inflatable support area, proposed the stratification theory of the gas film, the gas in inflatable support area was divided into near wall layer, thin layer, continuous flow layer along its height direction, proposed...

Based on comprehensive considerations of influences generated by stiffness excitation, deviation excitation, meshing impact excitation, friction of tooth surface, and other kinds of nonlinear factors, it established a nonlinear coupled vibration model of bending-torsion-axial-swing coupled helical gear...