The αmax is decided by d and λ, which is the ratio between the spring constant and the mass of the microstructure, and d is better than λ as far as the contribution to the α max is concerned.

The mechanics model of a closed and B-shaped MEMS planar microspring is established which is fabricated by UV-LIGA technology. The calculation formula of spring constant about B-shaped microspring in the linear range is derived by the Castigliano's second theorem of energy method.

The auxiliary parameters, including the hammer weight, the hammer fall, the spring constant of the cap-block, the coefficient of restitution of cap-block and pile-cushion, and the efficiency of the hammer, etc. , only influence the curves R=f(S) or R=f(N)but not change the value of the ac-tual bearing capacity of the pile.

A simplified method for calculating pile cap of pile raft or pile box foundation in high rise buildings,named Spring Constant Method,is developed,and the calculation formula for the spring constant based on settlement computation is presented.

By correcting the soil spring constant, the model can be used to obtain the design curves of pile displacements and to match the experimental data of in situ pile load tests.

Numerical test for the Qian-dao Lake case gave the relation that the radial force of tension legs varied with spring constant of tension legs, flexural rigidity, curvature radius and central angle of SFT.

Based on half-car model and analysis of the effect on vehicle riding comfort of increasing passive spring constant and damping constant coefficients, active filtered plus output feedback control strategy is proposed and studied in detail.

A parameter stiffness ratios is defined as the ratio of the spring constant between the two mass elements to that between one mass element and the moving plate.

The results reveal that thermal stresses vary with the aspect ratio of the inhomogeneity and the parameterh describing the spring constant of the interphase layer for four different types of inhomogeneous materials: aluminum, copper, gold and silver.

The rotational discontinuity at the crack is modeled by a torsional spring with an equivalent spring constant for the crack.

These results were then compared against an SI-traceable spring constant measurement from an electrostatic force balance (EFB).

First, a dynamic indentation-based method was used to measure the spring constant of a rectangular cantilever beam.

This paper presents a method of determining the equivalent vertical spring constant of layered subsoil. The derivation is based on an elasticity formula in succinct form, so that both accuracy and simplicity are secured. An accessary chart is provided for further labour saving.ln principle, this method may also be used to deal with the equ(?)valent Winkler's modulus or Young's modulus of layered media for the calculation of beams on elastic foundations.

Four conditions of shock vibration during chain breaking have been discussed. 1. Breaking test on simple testing machine with main cylinder fixed on a foundation. In this case the only one vibrating mass is the piston, which rigidly connected the moving clamp of chain as a whole body with one degree of freedom. 2. Breaking test on testing machine with leaf spring isolators between machine and foundation. In this case vibrations of two vibrating masses with two degrees of freedom have been discussed. 3. Strength...

Four conditions of shock vibration during chain breaking have been discussed. 1. Breaking test on simple testing machine with main cylinder fixed on a foundation. In this case the only one vibrating mass is the piston, which rigidly connected the moving clamp of chain as a whole body with one degree of freedom. 2. Breaking test on testing machine with leaf spring isolators between machine and foundation. In this case vibrations of two vibrating masses with two degrees of freedom have been discussed. 3. Strength test on testing machine with leaf spring isolators. The effect of machine frame has been taken into consideration, and thus it forms a system of three masses with three degrees of freedom. 4. The effect of accumulator during breaking test. This is a problem of vibration with variable spring constant.In each case formulas for calculating shock pressure wave in main cylinder and displacements of vibrating masses have been derived. In order to clarify the characteristics of vibrations, numerical examples are worked out in each case. The results of these examples clearly show that installing the accumulator and leaf spring isolators are effective measures to minimize the influence of shock vibration.

A conventional mass-spring-damper system tractor seat can not accpmmpdate the op-erators with various weights due to.the unadjustability of the seat characterisic pa-rameters. This study involves the development of tractor seat suspension system with adjustable equivalent spring constant and damping coefficient. The simulation progr-ams based on the mathematical model of its attenuation characteristics would pre-dict the feasibility of this adjustable system. A pilot system was constructed to veri-fy its...

A conventional mass-spring-damper system tractor seat can not accpmmpdate the op-erators with various weights due to.the unadjustability of the seat characterisic pa-rameters. This study involves the development of tractor seat suspension system with adjustable equivalent spring constant and damping coefficient. The simulation progr-ams based on the mathematical model of its attenuation characteristics would pre-dict the feasibility of this adjustable system. A pilot system was constructed to veri-fy its effectiveness and the simulation model. Eleven tests have been couducted by using this pilot system on a vibration exciter. The results show that this system is adjustable through simple mechanism. The matching qf the charateristic parameters with the weights of tractor-operators is optimized and the selecting procedure for the charateristic parameters is summarized.