【摘要】 三圆弧波纹膜片(见图1)是一种常用的膜片。膜片的外边缘波可以有不同的大小,虽然都是圆弧波纹,但随边缘波的大小不同,膜片特性,应力值,有效面积也不同。作者利用环壳理论和初参数法,对不同边缘波的三圆弧波纹膜片进行了大量计算,并与实验做了比较,拟合出不同边缘波的三圆弧波纹膜片的工程简便公式,为工程设计提供了实用而可靠的设计公式和方法。更多还原

【Abstract】 The three-convolution circular are corrugated diphragms(see Fig.1) are now in common use. Their outer fringe circular are wave varys in measurement. The waves of diaphrams are all in the shape of circular arc, but the characteristies, stress values and effective areas of the diaphragms themselves are different, owing to their different outer fringe waves. This paper, by means of toroidal shell theory (see V.V. Novozilov[1])and initial parameter method of numerical integration, presents the calculation of three-convolution circular arc corrugated diaphragms with various outer fringe waves, compares the results of the calculation with experiments (see W. A. Wildhack [3]) and with orthogonal anisotropy plate theory (see L, E, Andrewa[2]). Through much calculation the the paper works out some fitted formulae for three types of three-convolution circular arc corrugated diaphragms with various outer fringe waves and for general cases with an arbitrary measurement of outer fringe circular arc wave. These formulae can be applied to calculating the characteristie and maximum composite stress of a diaphragm, when the diaphragm is subjected to a uniform pressure or a concentrated load at the center. They can also be applied to calculating the effective area of the diaphragm. These formulae are not only reliable but also simple and convenient for engineering workers who can use them with only pocket calculators. This paper also discusses the influence of outer fringe wave on design of corrugated diaphragms and shows that when diaphragms are subjected to uniform pressure, the larger the outer fringe wave is,the higher the sensitivity of the diaphragms and the smaller maximum composite stress. The sensitivity of symmetrical corrugated diaphragms is low, their composite stress is big, but their characteristics in two directions are identical. When diaphragms are subjected to concentrated load, the influence of outer fringe wave is slightly different from under uniform pressure. The effective area of diaphragms is, by and large, independent of the measurement of outer wave. Finally, the paper gives an example showing the way to design a diaphragm with the fitted formulae.更多还原