The Corcoran Gallery of Art yesterday completed the restructuring of its top management by announcing the appointment of Bruce Yenawine, president of the Swain School of Design in New Bedford, Mass., as dean of its School of Art.

The appointment follows by two months the naming of Christina Orr-Cahall, chief curator of the Oakland Museum, as director of the gallery. Orr-Cahall, who officially assumes the Corcoran directorship on Feb. 1, succeeds Michael Botwinick, whose resignation took effect last June.

David Lloyd Kreeger, president of the Corcoran board, said that Yenawine "has had a spectacular record in his career, culminating in a year of unprecedented growth at the Swain School." He succeeds William Barrett, who resigned as dean last July.

Yenawine, 37, took over the Swain School in 1982, and supervised a doubling of its programs, faculty and facilities. He recently oversaw plans for a merger of the school with Southeastern Massachusetts University, which, according to a Corcoran trustee, greatly stabilized the design school's financial future.

The Swain School, described as "somewhat smaller" than the Corcoran, was founded in 1881 and currently grants bachelor's degrees in eight disciplines. Yenawine last year added "architectural artisanry," a innovative program to train building craftsmen, to the curriculum.

From 1974 to 1982 he was director of the Louisville School of Art and holds a bachelor's degree in English and a master's in higher education from the University of Louisville. He has served on the board of directors and the commission on accreditation of the National Association of Schools of Art.

One of Yenawine's long-term challenges at the Corcoran will be to relieve overcrowding. Barrett had said the school needs nearly to double its 45,000 square feet of space to function more efficiently, and increases in enrollment last fall (from 201 to 256 full-time undergraduates in addition to 650 part-time students) have added to the problem.

Yenawine officially assumes his new job on March 1.